在ARC下使用

[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

#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

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

　　

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

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