iphone 常用函数汇总

最新推荐文章于 2022-09-21 11:10:42 发布

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最新推荐文章于 2022-09-21 11:10:42 发布

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本文介绍了如何通过Objective-C语言，利用setValuesForKeysWithDictionary函数，将字典中的键值对自动赋值给对象的各个成员变量。详细解释了实现过程，包括定义类、初始化对象以及遍历字典进行赋值。

1：将字典中的键值对赋值给对象的各个成员变量。关键字：

setValuesForKeysWithDictionary

1.1先定义一个类，该类为Quotation 声明如下：

@interface Quotation : NSObject {

}

@property (nonatomic, retain) NSString *character;
@property (nonatomic, assign) NSInteger act;
@property (nonatomic, assign) NSInteger scene;
@property (nonatomic, retain) NSString *quotation;

@end

@implementation Quotation

@synthesize character, act, scene, quotation;

- (void)dealloc {
    [character release];
    [quotation release];
    [super dealloc];
}

@end

1.2 然后自动从字典中将值取到对象中。使用了“setValuesForKeysWithDictionary”这么一个函数，代码如下：

NSArray *quotationDictionaries = [playDictionary objectForKey:@"quotations"];

        NSMutableArray *quotations = [NSMutableArray arrayWithCapacity:[quotationDictionaries count]];

        for (NSDictionary *quotationDictionary in quotationDictionaries) {

            Quotation *quotation = [[Quotation alloc] init];
            [quotation setValuesForKeysWithDictionary:quotationDictionary];

            [quotations addObject:quotation];
            [quotation release];

}