MVC, model注意事项

model中去掉多余的model属性,即key,

- (void)setValue:(id)value forUndefinedKey:(NSString *)key

{

}

model中含有id,并且给model中的id重命名为id_, model中的.m中代码如下:

-(void)setValue:(id)value forKey:(NSString *)key

{

     [super setValue:value forKey:key];

     if ([key isEqualToString:@"id"]) {

           self.id_ = value;

     }

}