NSObject方法: - (id)forwardingTargetForSelector:(SEL)aSelector;+ (BOOL)resolveInstanceMethod:(SEL)sel;
摘要:
1.(forwardingTargetForSelector):{ forwardingTargetForSelector是NSObject的函数,用户可以在派生类中对其重载,从而将无法处理的selector转 发给另一个对象。还是以上面的uppercaseString为例,如果用户自己定义的CA... 阅读全文