解决ARC下performselector-may-cause-a-leak-because-its-selector-is-unknown 警告

在ARC下使用 

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1	[theTarget performSelector:theTarget withObject:Nil];

会出现警告：performselector-may-cause-a-leak-because-its-selector-is-unknown 

解决方法：

1：添加如下宏

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

2：使用宏

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1	SuppressPerformSelectorLeakWarning([theTarget performSelector:theAction withObject:@"hello"]);

　　

参考：http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown