iOS9 popover始终指向锚点的左上角

Question

我正在使用一个故事板segue,它将视图控制器呈现为popover.seque有一个自定义UIView作为其锚点.在iOS9之前,popover会正确指向自定义的中心底部UIView(在UIView下面显示).在iOS9上,它指向的左上角UIView.

我确实试图跟踪所有选择器调用到自定义,UIView以找出我可能需要在我的自定义中实现什么,UIView以提供弹出窗口的"热点",但找不到任何东西

有任何想法吗..？谢谢

感谢@Igor Camilo他的回复 - 如果它对某些人有用,这就是我在我的代码中修复它的方法:

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

     UIPopoverPresentationController* possiblePopOver = segue.destinationViewController.popoverPresentationController;
     if (possiblePopOver != nil) {
         //
         // iOS9 -- ensure correct sourceRect
         //
         possiblePopOver.sourceRect = possiblePopOver.sourceView.bounds;
     }
    ...
 }

示例: "短"按钮触发弹出窗口,弹出窗口指向"排序"控件的左上角

Answer 1

我有同样的问题.我刚刚通过在prepareForSegue中设置sourceRect来解决它:

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    switch segue.identifier {
    case "Popover Identifier"?:
        if #available(iOS 9.0, *) {
            segue.destinationViewController?.popoverPresentationController?.sourceRect = anchorView.bounds
        }
    default:
        break
    }
}

Answer 2

有同样的问题,但我的应用程序有多个弹出窗口,所以我为修复程序创建了一个集中的功能(但仍然必须在每个具有弹出窗口的视图控制器上使用它).

// Fix for IOS 9 pop-over arrow anchor bug
// ---------------------------------------
// - IOS9 points pop-over arrows on the top left corner of the anchor view
// - It seems that the popover controller's sourceRect is not being set
//   so, if it is empty  CGRect(0,0,0,0), we simply set it to the source view's bounds
//   which produces the same result as the IOS8 behaviour.
// - This method is to be called in the prepareForSegue method override of all
//   view controllers that use a PopOver segue
//
//   example use:
//
//          override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) 
//          {
//             fixIOS9PopOverAnchor(segue)   
//          }
//      
extension UIViewController
{
   func fixIOS9PopOverAnchor(segue:UIStoryboardSegue?)
   {
      guard #available(iOS 9.0, *) else { return }          
      if let popOver = segue?.destinationViewController.popoverPresentationController,
         let anchor  = popOver.sourceView
         where popOver.sourceRect == CGRect()      
            && segue!.sourceViewController === self 
      { popOver.sourceRect = anchor.bounds }   
   }       
}

Answer 3

这是Igor Camilo在Objective-C中的片段的一个例子.

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    // If the sender is a UIView, we might have to correct the sourceRect of
    // a potential popover being presented due to an iOS 9 bug. See:
    // https://openradar.appspot.com/22095792 and http://stackoverflow.com/a/32698841/368674
    if ([sender isKindOfClass:UIView.class]) {
        // Fetch the destination view controller
        UIViewController *destinationViewController = [segue destinationViewController];

        // If there is indeed a UIPopoverPresentationController involved
        if ([destinationViewController respondsToSelector:@selector(popoverPresentationController)]) {
            // Fetch the popover presentation controller
            UIPopoverPresentationController *popoverPresentationController =
            destinationViewController.popoverPresentationController;

            // Set the correct sourceRect given the sender's bounds
            popoverPresentationController.sourceRect = ((UIView *)sender).bounds;
        }
    }
}

Answer 4

这是我的解决方案,里面prepareForSegue:

segue.destinationViewController.popoverPresentationController?.sourceRect = CGRectMake(anchorView.frame.size.width/2, anchorView.frame.size.height, 0, 0)

这会将指针移动到锚点视图的底部中间