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

在ARC项目中使用 performSelector: withObject: 函数出现“performSelector may 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.ticketTarget performSelector: 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(    [_target performSelector:_action withObject:self]);
如果要返回结果,可以按如下方式调用:
id result;SuppressPerformSelectorLeakWarning(    result = [_target performSelector:_action withObject:self]);