IMP用法

/// 请求回调 通用处理

- (void)makeCommonResponse:(id)responseObject selector:(SEL)selector {

    int code = [response ObjectintForKey:@"status"];

    NSString *msg = [response ObjectstringForKey:@"msg"];

    if(code ==200) {

        IMP imp = [self methodForSelector:selector];

        void(*func)(id,SEL,id) = (void*)imp;

        func(self, selector, responseObject);

    }

}

可以调用传过来的 方法！