YYKit系列之——YYModel使用

目录

• JSON转字符串
• 普通字典转模型
• 模型属性有自定义的模型YYUSer
• 属性有数组（数组里自定义模型），还有字典和集合
• 字典里的key与模型里的属性名不一致

常用的几个方法：

# json转模型
+ (instancetype)yy_modelWithJSON:(id)json;

# 模型转字符串
- (NSString *)yy_modelToJSONString 

# 字典转模型
+ (instancetype)yy_modelWithDictionary:(NSDictionary *)dictionary ;

# 声明数组、字典或者集合里的元素类型时要重写
+ (nullable NSDictionary<NSString *, id> *)modelContainerPropertyGenericClass；

# 字典里的key值与模型的属性值不一致要重复
+ (nullable NSDictionary<NSString *, id> *)modelCustomPropertyMapper;

# 下面两者是属性值在两个dic与模型之间的转化方法（自己看代码吧~

- (BOOL)modelCustomTransformFromDictionary:(NSDictionary *)dic ；
- (BOOL)modelCustomTransformToDictionary:(NSMutableDictionary *)dic；
代码演示和转模型注释：
一、JSON转字符串
执行代码：
// JSON ->模型 （内部实现：json -> 字典 -> 模型）
YYBook *book = [YYBook yy_modelWithJSON:@"     \
                {                                           \
                \"name\": \"Harry Potter\",              \
                \"pages\": 512,                          \
                \"publishDate\": \"2010-01-01\"          \
                }"];
//模型 -> 字符串
NSString *bookJSON = [book yy_modelToJSONString];
NSLog(@"Book: %@", bookJSON);
二、普通字典转模型
模型代码：
@property (nonatomic, copy) NSString *name;
@property (nonatomic, assign) uint64_t pages;
@property (nonatomic, strong) NSDate *publishDate;
执行代码：
 NSDictionary *dic = @{
                          @"name": @"Harry Potter",
                          @"pages": @(512),
                          @"publishDate": @"2010-01-01"
                          };
YYBook *book1 = [YYBook yy_modelWithDictionary:dic];
NSString *bookJSON1 = [book1 yy_modelToJSONString];
NSLog(@"bookJSON: %@",bookJSON1);
三、模型属性有自定义的模型YYUSer
模型代码：
@property (nonatomic, assign) uint64_t rid;
@property (nonatomic, copy) NSString *name;
@property (nonatomic, strong) NSDate *createTime;
@property (nonatomic, strong) YYUser *owner;  #自定义模型
执行代码：
NSDictionary *dic = @{
                      @"rid": @(123456789),
                      @"name": @"YYKit",
                      @"createTime" : @"2011-06-09T06:24:26Z",
                      @"owner": @{
                              @"uid" : @(989898),
                              @"name" : @"mawenxing"
                              }
                      };

YYRepo *repo1 = [YYRepo yy_modelWithDictionary:dic];
NSLog(@"Repo1: %@\nowner.name=%@", repo1.name,repo1.owner.name);
四、属性有数组属性里有数组（数组里自定义模型），还多字典和集合
模型代码：
# YYAlbum.h
@property (nonatomic, copy) NSString *name;
@property (nonatomic, strong) NSArray *photos; # Array<YYPhoto>
@property (nonatomic, strong) NSDictionary *likedUsers; # Key:name(NSString) Value:user(YYUser)
@property (nonatomic, strong) NSSet *likedUserIds; # Set<NSNumber>

# YYPhoto.h
@property (nonatomic, copy) NSString *url;
@property (nonatomic, copy) NSString *desc;

# YYAlbum.m
#把数组里面带有对象的类型专门按照这个方法，这个格式写出来
-(nullable NSDictionary<NSString *, id> *)modelContainerPropertyGenericClass{
    return @{
             @"photos"       : YYPhoto.class,
             @"likedUsers"   : YYUser.class,
             @"likedUserIds" : NSNumber.class
             };
}
执行代码：
///源代码这里有些成字典的，大家如果看不懂这个JSON可以看字典
YYAlbum *album = [YYAlbum yy_modelWithJSON:@"          \
                      {                                                   \
                      \"name\" : \"Happy Birthday\",                      \
                      \"photos\" : [                                      \
                      {                                               \
                      \"url\":\"http://example.com/1.png\",       \
                      \"desc\":\"Happy~\"                         \
                      },                                              \
                      {                                               \
                      \"url\":\"http://example.com/2.png\",       \
                      \"desc\":\"Yeah!\"                          \
                      }                                               \
                      ],                                                  \
                      \"likedUsers\" : {                                  \
                      \"Jony\" : {\"uid\":10001,\"name\":\"Jony\"},   \
                      \"Anna\" : {\"uid\":10002,\"name\":\"Anna\"}    \
                      },                                                  \
                      \"likedUserIds\" : [10001,10002]                    \
                      }"];
    NSString *albumJSON = [album yy_modelToJSONString];
    NSLog(@"Album: %@", albumJSON);
五、字典里的属性名与模型里的属性名不一致
模型代码：
# YYMessage.h
@property (nonatomic, assign) uint64_t messageId;
@property (nonatomic, strong) NSString *content;
@property (nonatomic, strong) NSDate *time;

# YYMessage.m
/*!
 *  1.该方法是 `字典里的属性Key` 和 `要转化为模型里的属性名` 不一样 而重写的
 *  前：模型的属性   后：字典里的属性
 */

+ (nullable NSDictionary<NSString *, id> *)modelCustomPropertyMapper{

    return @{@"messageId":@"i",
             @"content":@"c",
             @"time":@"t"};
}

/*!
 *  2. 下面的两个方法 `字典里值`与`模型的值`类型不一样`需要转换`而重写的方法
 *   NSDate *time     dic[@"t"]是double类型的的秒数
 */

/// Dic -> model
- (BOOL)modelCustomTransformFromDictionary:(NSDictionary *)dic {

    self.time = (NSDate *)[NSDate dateWithTimeIntervalSince1970:[dic[@"t"] doubleValue]/1000];

    return YES;
}

/// model -> Dic
- (BOOL)modelCustomTransformToDictionary:(NSMutableDictionary *)dic {

    dic[@"t"] = @([self.time timeIntervalSince1970] * 1000).description;

    return YES;
}
执行代码：
/*!
 *  第一种：字典版
 */
NSDictionary *dic = @{@"i":@2000000001,
                      @"c":@"Hello",
                      @"t":@1437237598000};

YYMessage *message = [YYMessage yy_modelWithDictionary:dic];


NSString *messageJSON = [message yy_modelToJSONString];

NSLog(@"messageJSON: %@", messageJSON);

/*!
 *  第二种：JSON版
 */
YYMessage *message = [YYMessage yy_modelWithJSON:@"{\"i\":\"2000000001\",\"c\":\"Hello\",\"t\":\"1437237598000\"}"];
NSString *messageJSON = [message yy_modelToJSONString];
NSLog(@"messageJSON: %@", messageJSON);
演示源码：吻我


 

  

 
 

  

 
 

  
  

  
开篇说明： 
虽然网上有很多讲解YYModel使用方法的文章，包括YYModel作者也在github上对其做了使用说明。 
但在我实际使用过程中，依然发现文档的不完善，比如对于复杂的模型（如多层嵌套）讲解的仍不透彻，同时本文也会介绍一神器配合YYModel使用，让你感受分分钟搞定模型创建的酸爽。 
当然为了减少读者的学习成本，本会对YYModel作者的文档进行丰富和扩展。
  
可在github上下载Demo，以便更直观了解各种使用场景详细代码。 
文章只要包含：
  

   

     
详解YYModel的多种使用场景

     
拓展插件，让你一分钟搞定所有的模型的创建和调用。
  
  
一、YYModel的使用场景
  
1.简单的 Model 与 JSON 相互转换
  
<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// JSON:</span>
{
    <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"uid"</span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">123456</span>,
    <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"name"</span>:<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"Harry"</span>,
    <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"created"</span>:<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"1965-07-31T00:00:00+0000"</span>
}

<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// Model:</span>
<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@interface</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">User</span> : <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">NSObject</span></span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> UInt64 uid;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *name;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDate</span> *created;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@end</span>

<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@implementation</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">User</span></span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@end</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li></ul>
  
-
  
<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 将 JSON (NSData,NSString,NSDictionary) 转换为 Model:</span>
User *user = [User yy_modelWithJSON:json];

<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 将 Model 转换为 JSON 对象:</span>
<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDictionary</span> *json = [user yy_modelToJSONObject];</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li></ul>
  
当 JSON/Dictionary 中的对象类型与 Model 属性不一致时，YYModel 将会进行如下自动转换。自动转换不支持的值将会被忽略，以避免各种潜在的崩溃问题。
  
JSON/Dictionary
Model
NSString
NSNumber,NSURL,SEL,Class
NSNumber
NSString
NSString/NSNumber
C
 number (BOOL,int,float,NSUInteger,UInt64,…)
NaN and Inf will be ignored
NSString
NSDate
 parsed with these formats:
yyyy-MM-dd
yyyy-MM-dd HH:mm:ss
yyyy-MM-dd’T’HH:mm:ss
yyyy-MM-dd’T’HH:mm:ssZ
EEE MMM dd HH:mm:ss Z yyyy
NSDate
NSString
 formatted with ISO8601:
“YYYY-MM-dd’T’HH:mm:ssZ”
NSValue
struct
 (CGRect,CGSize,…)
NSNull
nil,0
“no”,”false”,…
@(NO),0
“yes”,”true”,…
@(YES),1
  
2.Model 属性名和 JSON 中的 Key 不相同
  
<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// JSON:</span>
{
    <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"n"</span>:<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"Harry Pottery"</span>,
    <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"p"</span>: <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">256</span>,
    <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"ext"</span> : {
        <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"desc"</span> : <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"A book written by J.K.Rowing."</span>
    },
    <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"ID"</span> : <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">100010</span>
}

<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// Model:</span>
<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@interface</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">Book</span> : <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">NSObject</span></span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *name;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSInteger</span> page;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *desc;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *bookID;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@end</span>
<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@implementation</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">Book</span></span>
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//返回一个 Dict，将 Model 属性名对映射到 JSON 的 Key。</span>
+ (<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDictionary</span> *)modelCustomPropertyMapper {
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> @{@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"name"</span> : @<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"n"</span>,
             @<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"page"</span> : @<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"p"</span>,
             @<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"desc"</span> : @<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"ext.desc"</span>,
             @<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"bookID"</span> : @[@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"id"</span>,@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"ID"</span>,@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"book_id"</span>]};
}
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@end</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li><li style="box-sizing: border-box; padding: 0px 5px;">25</li><li style="box-sizing: border-box; padding: 0px 5px;">26</li></ul>
  
你可以把一个或一组 json key (key path) 映射到一个或多个属性。如果一个属性没有映射关系，那默认会使用相同属性名作为映射。 
在 json->model 的过程中：如果一个属性对应了多个 json key，那么转换过程会按顺序查找，并使用第一个不为空的值。 
在 model->json 的过程中：如果一个属性对应了多个 json key (key path)，那么转换过程仅会处理第一个 json key (key path)；如果多个属性对应了同一个 json key，则转换过过程会使用其中任意一个不为空的值。
  
3.Model 包含其他 Model
  
<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// JSON</span>
{
    <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"author"</span>:{
        <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"name"</span>:<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"J.K.Rowling"</span>,
        <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"birthday"</span>:<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"1965-07-31T00:00:00+0000"</span>
    },
    <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"name"</span>:<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"Harry Potter"</span>,
    <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"pages"</span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">256</span>
}

<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// Model: 什么都不用做，转换会自动完成</span>
<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@interface</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">Author</span> : <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">NSObject</span></span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *name;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDate</span> *birthday;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@end</span>
<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@implementation</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">Author</span></span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@end</span>

<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@interface</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">Book</span> : <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">NSObject</span></span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *name;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> NSUInteger pages;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> Author *author; <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//Book 包含 Author 属性</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@end</span>
<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@implementation</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">Book</span></span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@end</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li><li style="box-sizing: border-box; padding: 0px 5px;">25</li></ul>
  
-
  
4.容器类属性
  
<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@class</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">Shadow</span>, <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">Border</span>, <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">Attachment</span>;</span>

<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@interface</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">Attributes</span></span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *name;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSArray</span> *shadows; <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//Array<Shadow></span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> NSSet *borders; <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//Set<Border></span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSMutableDictionary</span> *attachments; <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//Dict<NSString,Attachment></span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@end</span>

<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@implementation</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">Attributes</span></span>
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 返回容器类中的所需要存放的数据类型 (以 Class 或 Class Name 的形式)。</span>
+ (<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDictionary</span> *)modelContainerPropertyGenericClass {
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> @{@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"shadows"</span> : [Shadow class],
             @<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"borders"</span> : Border<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.class</span>,
             @<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"attachments"</span> : @<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"Attachment"</span> };
}
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@end</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li></ul>
  
在实际使用过过程中，[Shadow class]，Border.class，@"Attachment"没有明显的区别。 
这里仅仅是创建作者有说明，实际使用时，需要对其遍历，取出容器中得字典，然后继续字典转模型。（YYModel的核心是通过runtime获取结构体中得Ivars的值，将此值定义为key,然后给key赋value值，所以我们需要自己遍历容器（NSArray，NSSet，NSDictionary），获取每一个值，然后KVC）。
  
-
  
具体的代码实现如下：
  
<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDictionary</span> *json =[<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">self</span> getJsonWithJsonName:@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"ContainerModel"</span>];
ContainerModel *containModel = [ContainerModel yy_modelWithDictionary:json];
<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDictionary</span> *dataDict = [containModel valueForKey:@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"data"</span>];
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//定义数组，接受key为list的数组</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">self</span><span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.listArray</span> = [dataDict valueForKey:@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"list"</span>]; 
 <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//遍历数组</span>
[<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">self</span><span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.listArray</span> enumerateObjectsUsingBlock:^(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">id</span>  _Nonnull obj, NSUInteger idx, <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">BOOL</span> * _Nonnull stop) {
        <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDictionary</span> *listDict = obj;
        <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//获取数组中得字典</span>
        List *listModel = [List yy_modelWithDictionary:listDict];
        <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//获取count 和 id</span>
        <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *count = [listModel valueForKey:@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"count"</span>];
        <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">id</span> = [listModel valueForKey:@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"id"</span>];
</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li></ul>
  
-
  
5.黑名单与白名单
  
<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@interface</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">User</span></span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *name;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> NSUInteger age;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@end</span>

<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@implementation</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">Attributes</span></span>
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 如果实现了该方法，则处理过程中会忽略该列表内的所有属性</span>
+ (<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSArray</span> *)modelPropertyBlacklist {
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> @[@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"test1"</span>, @<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"test2"</span>];
}
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 如果实现了该方法，则处理过程中不会处理该列表外的属性。</span>
+ (<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSArray</span> *)modelPropertyWhitelist {
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> @[@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"name"</span>];
}
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@end</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li></ul>
  
-
  
6.数据校验与自定义转换
  
实际这个分类的目的比较简单和明确。 
就是对判断是否为时间戳，然后对时间戳进行处理，调用 
_createdAt = [NSDate dateWithTimeIntervalSince1970:timestamp.floatValue]; 
获取时间。
  
<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// JSON:</span>
{
    <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"name"</span>:<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"Harry"</span>,
    <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"timestamp"</span> : <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1445534567</span>     <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">//时间戳</span>
}

<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// Model:</span>
<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@interface</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">User</span></span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *name;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDate</span> *createdAt;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@end</span>

<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@implementation</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">User</span></span>
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 当 JSON 转为 Model 完成后，该方法会被调用。</span>
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 你可以在这里对数据进行校验，如果校验不通过，可以返回 NO，则该 Model 会被忽略。</span>
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 你也可以在这里做一些自动转换不能完成的工作。</span>
- (<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">BOOL</span>)modelCustomTransformFromDictionary:(<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDictionary</span> *)dic {
    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSNumber</span> *timestamp = dic[@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"timestamp"</span>];
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (![timestamp isKindOfClass:[<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSNumber</span> class]]) <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> <span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">NO</span>;
    _createdAt = [<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSDate</span> dateWithTimeIntervalSince1970:timestamp<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.floatValue</span>];
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> <span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">YES</span>;
}

<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 当 Model 转为 JSON 完成后，该方法会被调用。</span>
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 你可以在这里对数据进行校验，如果校验不通过，可以返回 NO，则该 Model 会被忽略。</span>
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 你也可以在这里做一些自动转换不能完成的工作。</span>
- (<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">BOOL</span>)modelCustomTransformToDictionary:(<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSMutableDictionary</span> *)dic {
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> (!_createdAt) <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> <span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">NO</span>;
    dic[@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"timestamp"</span>] = @(n<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.timeIntervalSince1970</span>);
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> <span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">YES</span>;
}
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@end</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li><li style="box-sizing: border-box; padding: 0px 5px;">25</li><li style="box-sizing: border-box; padding: 0px 5px;">26</li><li style="box-sizing: border-box; padding: 0px 5px;">27</li><li style="box-sizing: border-box; padding: 0px 5px;">28</li><li style="box-sizing: border-box; padding: 0px 5px;">29</li><li style="box-sizing: border-box; padding: 0px 5px;">30</li><li style="box-sizing: border-box; padding: 0px 5px;">31</li><li style="box-sizing: border-box; padding: 0px 5px;">32</li></ul>
  

   
需要注意的时，如果用插件，对时间戳类型或默认创建为NSUInteger类型，需要将其更改为NSDate类型。
  
  
-
  
7.Coding/Copying/hash/equal/description
  
以下方法都是YYModel的简单封装，实际使用过程和系统方法区别不大。对其感兴趣的可以点进方法内部查看。
  
<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: "Source Code Pro", monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@interface</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">YYShadow</span> :<span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">NSObject</span> <<span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">NSCoding</span>, <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">NSCopying</span>></span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> (<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">nonatomic</span>, copy) <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *name;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@property</span> (<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">nonatomic</span>, <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">assign</span>) <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">CGSize</span> size;
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@end</span>

<span class="hljs-class" style="box-sizing: border-box;"><span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@implementation</span> <span class="hljs-title" style="box-sizing: border-box; color: rgb(102, 0, 102);">YYShadow</span></span>
<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">// 直接添加以下代码即可自动完成</span>
- (<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">void</span>)encodeWithCoder:(NSCoder *)aCoder { 
    [<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">self</span> yy_modelEncodeWithCoder:aCoder]; 
}
- (<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">id</span>)initWithCoder:(NSCoder *)aDecoder {
     <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">self</span> = [<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">super</span> init];
     <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> [<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">self</span> yy_modelInitWithCoder:aDecoder]; 
}
- (<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">id</span>)copyWithZone:(NSZone *)zone { 
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> [<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">self</span> yy_modelCopy]; 
}
- (NSUInteger)hash { 
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> [<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">self</span> yy_modelHash]; 
}
- (<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">BOOL</span>)isEqual:(<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">id</span>)object { 
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> [<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">self</span> yy_modelIsEqual:object]; 
}
- (<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> *)description { 
    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">return</span> [<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">self</span> yy_modelDescription]; 
}
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">@end</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right: 1px solid rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li><li style="box-sizing: border-box; padding: 0px 5px;">25</li><li style="box-sizing: border-box; padding: 0px 5px;">26</li><li style="box-sizing: border-box; padding: 0px 5px;">27</li></ul>
  
-
  
二、ESJsonFormat与YYModel的结合使用
  
彩蛋 
给大家介绍一款插件，配合ESJsonFormat
  
配图： 

  
使用方法： 
快捷键：shift + control + J 
插件安装方法比较简单，在此不赘述，不知道可自行google。
  
好处：
  

   

     
可以直接将json数据复制，ESJsonFormat会根据数据类型自动生成属性。（建议还是要自行检查，比如时间戳，系统会默认帮你生成为NSUInteger，而我们想要的为NSDate类型）

     
对于多模型嵌套，不必创建多个文件，ESJsonFormat会自动在一个文件下创建多重类型,极其便捷。
  
  
- 
至此YYModel的使用已讲解完毕，关于YYModel的底层核心是运用runtime获取类结构体中Ivars，进行KVC操作，然后根据不同情况进行分别处理。 
此处只是传递给大家一个概念，不展开讲解，网上有很多源码分析文章，可自学google学习。