"performSelector may cause a leak because its selector is unknown"解决方案

Because you're dynamically assigning action, the compiler sees a possible leak with ARC. In the future, the LLVM compiler may allow you to suppress the warning. Until then, you can avoid the warning by using the runtime's objc_msgSend() instead of -performSelector:.

First, import the runtime message header

#import <objc/message.h>

Next, replace  performSelector:  with  objc_msgSend()

 

 // [object performSelector:action]; objc_msgSend(object, action);

 

或者禁止warning

 

In the LLVM 3.0 compiler in Xcode 4.2 you can suppress the warning as follows:

#pragma clang diagnostic push #pragma clang diagnostic ignored "-Warc-performSelector-leaks" [object performSelector:action]; #pragma clang diagnostic pop

Thanks to Scott Thompson (about this similar question: performSelector may cause a leak because its selector is unknown) for the answer.