UIView中点击事件寻找viewController或者其他

记录:可以写成扩展

• (UIViewController *)viewController
  {
  UIResponder *next = [self nextResponder];
  do {
  if ([next isKindOfClass:[UIViewController class]]) {
  return (UIViewController *)next;
  }

    next = [next nextResponder];
  

  } while (next != nil);

return nil;

}