我如何使用<代码>id的关键性编码信息(编号Value:ForKey:等等)? 关键价值编码程序作为非正式程序实施,因此不列入<代码><NSObject> protocol,我只能说id<NSObject> setValue:ForKey:。
仅指这种方法。 汇编者在<代码>id变量上为未知方法赢得了短片警告。
id myObj = [myArray objectAtIndex:0];
[myObj setValue:@"value" forKey:@"key"];
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