iOS 通过View,获取该View的ViewController

//获取View的ViewController

• (UIViewController )viewController {
  //便利
  for (UIView next = [self superview]; next; next = next.superview) {
  //响应者链
  UIResponder *nextResponder = [next nextResponder];
  //判断View所述的ViewController
  if ([nextResponder isKindOfClass:[UIViewController class]]) {
  return (UIViewController *)nextResponder;
  }
  }
  return nil;
  }

原理:
通过 便利 响应者链 判断 是否是该 View 的VIewControll