UIAlertController在外部点击时处理解除（IPad）

3 回答

• 43

  您可以使用样式添加动作：UIAlertActionStyleCancel，当用户点击弹出窗口外，将调用此动作的处理程序 .

  if ([UIAlertController class]) {
      UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Alert Title" message:@"A Message" preferredStyle:UIAlertControllerStyleActionSheet];
  
      [alertController addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
          NSLog(@"User clicked button called %@ or tapped elsewhere",action.title);
      }]];
  
      [alertController addAction:[UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
          NSLog(@"User clicked button called %@",action.title);
      }]];
  
      [alertController addAction:[UIAlertAction actionWithTitle:@"Other" style:UIAlertActionStyleDestructive handler:^(UIAlertAction *action) {
          NSLog(@"User clicked button called %@",action.title);
      }]];
  
      UIControl *aControl = (UIControl *) sender;
      CGRect frameInView = [aControl convertRect:aControl.bounds toView:self.view];
      alertController.popoverPresentationController.sourceRect = frameInView;
      alertController.popoverPresentationController.sourceView = self.view;
      alertController.popoverPresentationController.permittedArrowDirections = UIPopoverArrowDirectionAny;
      [self presentViewController:alertController animated:YES completion:nil];
  }
  

  回复于 2024-04-30T03:47:06+08:00
• 16

  适用于UIAlertController并具有警报风格的解决方案 . 只需要为alertController superview添加手势识别器 .

  [self presentViewController: alertController
                     animated: YES
                   completion:^{
                       alertController.view.superview.userInteractionEnabled = YES;
                       [alertController.view.superview addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget: self action: @selector(alertControllerBackgroundTapped)]];
                   }];
  
  - (void)alertControllerBackgroundTapped
  {
      [self dismissViewControllerAnimated: YES
                               completion: nil];
  }
  

  回复于 2024-04-30T03:47:06+08:00
• 1

  UITapGestureRecognizer对我不起作用所以我用这种方式：

  func addDismissControl(_ toView: UIView) {
      let dismissControl = UIControl()
      dismissControl.addTarget(self, action: #selector(self.dismissAlertController), for: .touchDown)
      dismissControl.frame = toView.superview?.frame ?? CGRect.zero
      toView.superview?.insertSubview(dismissControl, belowSubview: toView)
  }
  
  func dismissAlertController() {
      self.dismiss(animated: true, completion: nil)
  }
  
  func presentAlertController(title: String?, message: String?, preferredStyle: UIAlertControllerStyle,  handler: ((UIAlertAction) -> Swift.Void)? = nil, completion: (() -> Swift.Void)? = nil) {
  
      let alertController = UIAlertController(title: title, message: nil, preferredStyle: .actionSheet)
      alertController.addAction(UIAlertAction(title: "OK", style: .default) { (alertAction) -> Void in
          handler?(alertAction)
      })
  
      self.present(alertController, animated: true, completion: {
          self.addDismissControl(alertController.view)
          completion?()
      })
  }
  
  func someWhereInYourViewController() {
      // ...
      presentAlertController(title: "SomeTitle", message: "SomeMessage", preferredStyle: .actionSheet, handler: { (alertAction) -> Void in
          //do some action
      }, completion: {
          //do something after presentation
      })
      // ...
  }
  

  回复于 2024-04-30T03:47:06+08:00