iOS json数据解析(1)

最新推荐文章于 2018-08-28 11:14:00 发布

Nackery

最新推荐文章于 2018-08-28 11:14:00 发布

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分类专栏： iOS 文章标签： iOS json 原生数据解析

本文链接：https://blog.youkuaiyun.com/NoPolun_iOS/article/details/56487041

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本文介绍了一个iOS应用中JSON数据解析的实例，展示了如何使用NSJSONSerialization将不同类型的JSON字符串转换为Objective-C对象，并通过具体代码演示了从简单的字典到复杂的嵌套结构的解析过程。

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原生解析：

#import "ViewController.h"
/*自己简单制作的一些JSON数据

{"name":"Jack","age":"30"}
{"user":{"name":"Jack","age":"30"}}
[{"name":"Jack"},{"name":"Jim"}]
{"user":[{"name":"Jack"},{"name":"Jim"}]}
*/
@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}
- (IBAction)clickBtn:(UIButton *)sender {
    [self simple4];

}
-(void)simple1{

字典

    NSString *jsonStr = @"{\"name\":\"Jack\",\"age\":\"30\"}";

    NSData *jsonData = [jsonStr dataUsingEncoding:NSUTF8StringEncoding];
    id jsonObj = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:nil];
    if ([jsonObj isKindOfClass:[NSDictionary class]]) {
        NSDictionary *dic =(NSDictionary*)jsonObj;

        NSLog(@"%@", [dic objectForKey:@"name"]);


    }
    if ([jsonObj isKindOfClass:[NSArray class]]) {

    }




}
-(void)simple2{

字典(字典)

   NSString *jsonStr =@"{\"user\":{\"name\":\"Jack\",\"age\":\"30\"}}" ;
    NSData *jsonData = [jsonStr dataUsingEncoding:NSUTF8StringEncoding];
    id jsonObj = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:nil];
    if ([jsonObj isKindOfClass:[NSDictionary class]]) {
        NSDictionary *dic =(NSDictionary*)jsonObj;
        NSDictionary *dic1 =[dic objectForKey:@"user"];
        NSLog(@"%@", [dic1 objectForKey:@"name"]);
    }
    if ([jsonObj isKindOfClass:[NSArray class]]) {

    }

}
-(void)simple3{

数组(字典)

   NSString *jsonStr =@"[{\"name\":\"Jack\"},{\"name\":\"Jim\"}]" ;
    NSData *jsonData = [jsonStr dataUsingEncoding:NSUTF8StringEncoding];
    id jsonObj = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:nil];
    if ([jsonObj isKindOfClass:[NSDictionary class]]) {
        NSDictionary *dic =(NSDictionary*)jsonObj;
        NSDictionary *dic1 =[dic objectForKey:@"user"];
        NSLog(@"%@", [dic1 objectForKey:@"name"]);
    }
    if ([jsonObj isKindOfClass:[NSArray class]]) {
        NSArray *array = (NSArray *)jsonObj;
        for (NSDictionary *dic in array) {
            NSLog(@"%@",[dic objectForKey:@"name"]);
        }
    }

}
-(void)simple4{

字典(数组(字典))

    NSString *jsonStr =@"{\"user\":[{\"name\":\"Jack\"},{\"name\":\"Jim\"}]}";
    NSData *jsonData = [jsonStr dataUsingEncoding:NSUTF8StringEncoding];
    id jsonObj = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:nil];
    if ([jsonObj isKindOfClass:[NSDictionary class]]) {
        NSDictionary *dic =(NSDictionary*)jsonObj;
        NSArray *array =[dic objectForKey:@"user"];
        for (NSDictionary *dic in array) {
            NSLog(@"%@",[dic objectForKey:@"name"]);
        }

    }
    if ([jsonObj isKindOfClass:[NSArray class]]) {
        NSArray *array = (NSArray *)jsonObj;
        for (NSDictionary *dic in array) {
            NSLog(@"%@",[dic objectForKey:@"name"]);
        }
    }

}
@end