弹出窗口没有指向按钮 [英] Pop over doesn't point over the button

问题描述

我的应用程序兼容iPhone和iPad布局。对于iPhone布局，我已经创建了Action Sheet和Pop over iPad。问题是弹出箭头没有指向我点击的按钮。下面是我的代码....

I have an application that is compatible with both iPhone and iPad layouts. For iPhone layout I have created Action Sheet and Pop over for iPad. The problem is pop over's arrow does not point over the button I clicked. Below is my code....

let actionSheet = UIAlertController(title: "Choose an option",
            message: "Message",
            preferredStyle: .ActionSheet)
...

if UIDevice.currentDevice().userInterfaceIdiom == UIUserInterfaceIdiom.Pad
{
     // for iPad
     actionSheet.popoverPresentationController?.sourceView = self.view
     actionSheet.popoverPresentationController?.sourceRect = self.view.bounds;
     actionSheet.popoverPresentationController?.permittedArrowDirections = UIPopoverArrowDirection.allZeros;
}

self.presentViewController(actionSheet, animated: true, completion: nil)

推荐答案

设置 sourceView 和 sourceRect 作为按钮和 button.bounds 。

您可以根据视图的布局选择allowedArrowDirections。

Set the sourceView and sourceRect as the button and button.bounds.
You can choose the permittedArrowDirections depending on the layout of your view.

actionSheet.popoverPresentationController?.sourceView = button
actionSheet.popoverPresentationController?.sourceRect = button.bounds;
actionSheet.popoverPresentationController?.permittedArrowDirections = UIPopoverArrowDirection.Left;

如果按钮是BarButtonItem，请使用此代码。

If the button is a BarButtonItem use this code.

actionSheet.popoverPresentationController?.barButtonItem = button
actionSheet.popoverPresentationController?.permittedArrowDirections = UIPopoverArrowDirection.Up;

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