1.作为属性的声明
@property(nonatomic,assign)SEL startSelect;
2.作为方法的参数
- (void)setHudView:(UIView*)hudview withShow:(SEL)showHUD hidden:(SEL)hiddenHUD;
3.调用传递的方法
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
if ([self.hud respondsToSelector:self.startSelect]) {
[self.hud performSelector:self.startSelect];
}
#pragma clang diagnostic pop
