warning:performSelector may cause a leak because its selector is unknown

在ARC项目中使用performSelector: withObject: 函数出现“performSelectormay cause a leak because its selector is unknown”。在stackoverflow找到了一个解决方案，地址：http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown。

主要是警告信息，在非ARC项目中没有这个警告。如果是在某一处修改只需要加入下列代码：

#pragma clang diagnostic push

#pragma clang diagnostic ignored"-Warc-performSelector-leaks"
    [self.ticketTargetperformSelector:self.ticketAction withObject:self];//此处是你调用函数的地方

#pragma clang diagnostic pop
如果在程序中多处使用，可以写一个宏定义，如下：

#define SuppressPerformSelectorLeakWarning(Stuff) \

do { \

_Pragma("clang diagnostic push") \

_Pragma("clang diagnostic ignored\"-Warc-performSelector-leaks\"") \

Stuff; \

_Pragma("clang diagnostic pop") \

} while (0)

如果没有返回结果，可以直接按如下方式调用：

 SuppressPerformSelectorLeakWarning(
       [_targetperformSelector:_action withObject:self]
);

如果要返回结果，可以按如下方式调用:

   id result;

   SuppressPerformSelectorLeakWarning(
         result = [_targetperformSelector:_action withObject:self]
      );