PerformSelector may cause a leak because its selector is unknown

本人使用的方法，需要针对每个warning进行添加

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"

id value = [weakSelf performSelector:getSel];//产生warning的代码

#pragma clang diagnostic pop

---------------------------------另一种方法--------------------------------------

另附全局宏定义的方法，也需要处理每个warning，大同小异

#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]
);