Ios popoverPresentationController（u:willRespositionPopOverto:in:）正在尝试更改不同方向上弹出窗口的大小

我有一个弹出窗口，当方向改变时，我试图改变宽度。当弹出窗口以当前方向显示时，我得到了所需的宽度，但当我从.trait->.scape切换时，我没有得到所需的宽度。例如，它只保留了一次.trait

我阅读了关于popoverPresentationController的文档（u3;：willPopOverto:in:）

但我不知道它是怎么工作的。 事实上，当我改变方向时，它甚至没有调用。我使用的UIPopoverPresentationControllerDelegate的其余部分工作正常

这是更改弹出窗口大小的正确方法，还是我应该使用其他方法

有什么帮助吗？非常感谢

func popoverPresentationController(_ popoverPresentationController: UIPopoverPresentationController, willRepositionPopoverTo rect: UnsafeMutablePointer<CGRect>, in view: AutoreleasingUnsafeMutablePointer<UIView>) {

        if popoverPresentationController.presentingViewController is PopUpTextPickerViewController{
            let viewFrame = popoverPresentationController.presentingViewController.view.frame

            let newRect = CGRect(x: viewFrame.origin.x, y: viewFrame.origin.y, width: self.view.bounds.width, height: 100)
            let newView = UIView(frame: newRect)
            rect.pointee =  newRect
            view.pointee = newView

        }
        print("popoverPresentation:willRepositionPopOverTo")
    }

    //Shows the PopUpTextPickerViewController on the screen
    @IBAction func fontButtonPressed(_ sender: UIBarButtonItem) {

        subscribeToNotifications(notification: .popUpTextPickerViewController)
        let fontController = storyboard?.instantiateViewController(withIdentifier: "popUpTextPickerViewController") as! PopUpTextPickerViewController
        fontController.fontName = self.fontName
        fontController.fontSize = self.fontSize
        fontController.modalPresentationStyle = UIModalPresentationStyle.popover
        fontController.popoverPresentationController?.delegate = self
        fontController.popoverPresentationController?.barButtonItem = fontButton
        fontController.popoverPresentationController?.backgroundColor = .clear
        fontController.popoverPresentationController?.sourceView = self.view
        fontController.preferredContentSize = CGSize(width: self.view.bounds.width, height: 100)
        present(fontController, animated: true, completion: nil)
    }

func popoverPresentationController（popoverPresentationController:UIPopoverPresentationController，将PopOverTo rect:UnsafemeutablePointer重新定位到视图中：AutoreleasingUnsafemeutablePointer）{
如果popoverPresentationController.presentingViewController是PopupExtPickerServiceController{
让viewFrame=popoverPresentationController.presentingViewController.view.frame
设newRect=CGRect（x:viewFrame.origin.x，y:viewFrame.origin.y，宽度：self.view.bounds.width，高度：100）
让newView=UIView（帧：newRect）
rect.pointee=newRect
view.pointee=newView
}
打印（“popoverPresentation:WillPopOverto”）
}
//在屏幕上显示PopUpTextPickerViewController
@iAction func fontButtonPressed（u发件人：UIBarButtonItem）{
subscribeToNotifications（通知：.popUpTextPickerViewController）
让fontController=storyboard？.InstanceEviewController（标识符为：“popUpTextPickerViewController”）作为！popUpTextPickerViewController
fontController.fontName=self.fontName
fontController.fontSize=self.fontSize
fontController.modalPresentationStyle=UIModalPresentationStyle.popover
fontController.popoverPresentationController？.delegate=self
fontController.popoverPresentationController？.barButtonItem=fontButton
fontController.popoverPresentationController？.backgroundColor=.clear
fontController.popoverPresentationController？.sourceView=self.view
fontController.preferredContentSize=CGSize（宽度：self.view.bounds.width，高度：100）
当前（fontController，动画：真，完成：无）
}

尝试在父视图控制器中实现以下代码。UIKit在更改显示的视图控制器视图的大小之前调用此方法-

override func viewWillTransition(to size: CGSize,
                        with coordinator: UIViewControllerTransitionCoordinator) {

    super.viewWillTransition(to: size, with: coordinator)

    if let myVC = self.presentedViewController as? MyViewController {
            myVC.preferredContentSize = CGSize(width: {yorWidth}, height: {yourHeight})
    }
}

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尝试在父视图控制器中实现以下代码。UIKit在更改显示的视图控制器视图的大小之前调用此方法-

override func viewWillTransition(to size: CGSize,
                        with coordinator: UIViewControllerTransitionCoordinator) {

    super.viewWillTransition(to: size, with: coordinator)

    if let myVC = self.presentedViewController as? MyViewController {
            myVC.preferredContentSize = CGSize(width: {yorWidth}, height: {yourHeight})
    }
}

---

你明白了吗？你明白了吗？