iphone 常用函数汇总

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];

        }