UIAlertController是Crashed（iPad）

8 回答

• 4

  为了使设备保持独立，请使用它，如下面的代码段所示 . 此代码将在iPhone /紧凑型设备上为popoverPresentationController返回nil，因此您可以安全地在通用项目中使用它 .

  if let popoverPresentationController = shareMenu.popoverPresentationController {
      popoverPresentationController.sourceView = self.view
      popoverPresentationController.sourceRect = sender.bounds
  }
  self.presentViewController(shareMenu, animated: true, completion: nil)
  

  回复于 2024-04-16T19:43:31+08:00
• 38

  试试这段代码：

  shareMenu.popoverPresentationController.sourceView = self.view
  shareMenu.popoverPresentationController.sourceRect = CGRectMake(self.view.bounds.size.width / 2.0, self.view.bounds.size.height / 2.0, 1.0, 1.0)
  
  self.presentViewController(shareMenu, animated: true, completion: nil)
  

  回复于 2024-04-16T19:43:31+08:00
• 0

  斯威夫特4

  popoverPresentationController.permittedArrowDirections = .init(rawValue: 0) popoverPresentationController.sourceView = self.view popoverPresentationController.sourceRect = CGRect(x: self.view.bounds.midX, y: self.view.bounds.midY, width: 0, height: 0)

  回复于 2024-04-16T19:43:31+08:00
• 1

  我也面临同样的问题，最后得到了解决方案 . 这是我对Objective c的解决方案

  UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Select you option:"
                                                                           message:nil
                                                                    preferredStyle:UIAlertControllerStyleActionSheet];
  
  UIAlertAction *action = [UIAlertAction actionWithTitle:@“share”
                                                       style:UIAlertActionStyleDefault
                                                     handler:^(UIAlertAction *action) {
                                                         // do other things
                                                     }];
  [alertController addAction:action];
  
  UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel"
                                                         style:UIAlertActionStyleCancel
                                                       handler:^(UIAlertAction *action) {
                                                       }];
  [alertController addAction:cancelAction];
  
  // Remove arrow from action sheet.
  [alertController.popoverPresentationController setPermittedArrowDirections:0];
  
  //For set action sheet to middle of view.
  CGRect rect = self.view.frame;
  rect.origin.x = self.view.frame.size.width / 20;
  rect.origin.y = self.view.frame.size.height / 20;
  alertController.popoverPresentationController.sourceView = self.view;
  alertController.popoverPresentationController.sourceRect = rect;
  
  [self presentViewController:alertController animated:YES completion:nil];
  

  回复于 2024-04-16T19:43:31+08:00
• 31

  我使用这个方便的扩展来创建永不崩溃的动作表

  extension UIAlertController {
  
      class func actionSheetWith(title: String?, message: String?, sourceView: UIView?, sourceFrame: CGRect?) -> UIAlertController {
          let actionController = UIAlertController(title: title, message: message, preferredStyle: .actionSheet)
          if actionController.responds(to: #selector(getter: popoverPresentationController)) {
              actionController.popoverPresentationController?.sourceView = sourceView ?? StoryboardHelper.tabBarControllerTopController()?.view
              actionController.popoverPresentationController?.sourceRect = sourceFrame ?? CGRect(x: 0, y: 0, width: 0, height: 0)
          }
          return actionController
      }
  
  }
  

  回复于 2024-04-16T19:43:31+08:00
• 0

  我使用这段代码，非常容易理解，也许我可以为任何人提供帮助

  //if iPhone
      if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
          [self presentViewController:actionSheet animated:YES completion:nil];
      }
      //if iPad
      else {
          // Change Rect to position Popover
          UIPopoverController *popup = [[UIPopoverController alloc] initWithContentViewController:actionSheet];
          [popup presentPopoverFromRect:CGRectMake(self.view.frame.size.width/2, self.view.frame.size.height/4, 0, 0)inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
      }
  

  回复于 2024-04-16T19:43:31+08:00
• 0

  斯威夫特3

  shareMenu.popoverPresentationController?.sourceView = self.view
  shareMenu.popoverPresentationController?.sourceRect = 
      CGRect(x: view.bounds.size.width, 
             y: view.bounds.size.height-80, 
             width: 1.0, height: 1.0)
  

  source rect是你要显示popover视图的点 .

  回复于 2024-04-16T19:43:31+08:00
• 1

  reference: ActionSheet Popover on iPad in Swift

  创建popoverController：

  let alertController = UIAlertController(title: nil, message: "Alert message.", preferredStyle: .actionSheet)
  self.present(alertController, animated: true, completion: nil)
  

  如果你想要显示警报与指标视图应该：

  if let popoverController = alertController.popoverPresentationController {
      popoverController.barButtonItem = sender
  }
  

  with indicator

  在中心显示提醒：

  if let popoverController = alertController.popoverPresentationController {
    popoverController.sourceView = self.view
    popoverController.sourceRect = CGRect(x: self.view.bounds.midX, y: self.view.bounds.midY, width: 0, height: 0) 
  }
  

  center with indicator

  中心无指标：

  if let popoverController = alertController.popoverPresentationController {
    popoverController.sourceView = self.view
    popoverController.sourceRect = CGRect(x: self.view.bounds.midX, y: self.view.bounds.midY, width: 0, height: 0)
    popoverController.permittedArrowDirections = []
  }
  

  center no indicator

  回复于 2024-04-16T19:43:31+08:00