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

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在ARC項目中使用 performSelector: withObject: 函數出現“performSelector may cause a leak because its selector is unknown”。在stackoverflow找到了一個解決方案，地址：http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown。

主要是警告資訊，在非ARC項目中沒有這個警告。如果是在某一處修改只需要加入下列代碼：

 

#pragma clang diagnostic push#pragma clang diagnostic ignored "-Warc-performSelector-leaks"    [self.ticketTarget performSelector: self.ticketAction withObject: self];//此處是你調用函數的地方#pragma clang diagnostic pop

如果在程式中多處使用，可以寫一個宏定義，如下：

#define SuppressPerformSelectorLeakWarning(Stuff)     do {         _Pragma("clang diagnostic push")         _Pragma("clang diagnostic ignored \"-Warc-performSelector-leaks\"")         Stuff;         _Pragma("clang diagnostic pop")     } while (0)

如果沒有返回結果，可以直接按如下方式調用：

SuppressPerformSelectorLeakWarning(    [_target performSelector:_action withObject:self]);

如果要返回結果，可以按如下方式調用:

id result;SuppressPerformSelectorLeakWarning(    result = [_target performSelector:_action withObject:self]);