在 viewWillTransition 上重新定位视图

Question

我有一个适用于 iOS 的应用程序，它有 3 个容器视图（A、B 和 C）。顶部容器视图 (A) 是静态的，下面是一个容器视图 (B)，带有一个按钮，可将其“移动”到一侧以显示第三个容器视图 (C)。我遇到的问题是，当我从 B 移动到 C 然后将手机侧翻时 B 和 C 重叠，如果我按下移动按钮，它们不会保留它们的位置并且位置突然重叠，因为它们都是重叠他们都走出了屏幕。我添加了 3 个显示行为的屏幕截图：
https://imgur.com/a/wluCkpT

到目前为止，这是我在 viewDidLoad 上的设置，我调用了 resetPositions()：

class HomeVC: UIViewController{
 var isMainContainer: Bool = true

func resetPositions() {
        if isMainContainer {
            if UIApplication.shared.statusBarOrientation.isLandscape {
                containerViewBot.center.y = containedView.center.y
                containerViewBotBack.center.y = containedView.center.y - offset
            } else {
                containerViewBot.center.x = self.view.center.x
                containerViewBotBack.center.x = self.view.center.x - offset
            }
        } else {
            if UIApplication.shared.statusBarOrientation.isLandscape {
                containerViewBotBack.center.y = containedView.center.y
                containerViewBot.center.y = containedView.center.y + offset
            } else {
                containerViewBotBack.center.x = self.view.center.x
                containerViewBot.center.x = self.view.center.x + offset
            }
        }
    }

现在，当我按下按钮从一个视图“移动”到另一个视图时，“isMainContainer”会发生变化：

func getMore(from: String) {
        //from is the sender
        if from == "homeResults" {
            containerViewBotBack.isHidden = false
            goToCommute()
        } else {
            //containerViewBotBack.isHidden = true
            containerViewBot.isHidden = false
            goToResults()
        }
    }

最后是 goToCommute 和 goToResults 方法：

func goToCommute() {
    let duration = 0.5
    if UIApplication.shared.statusBarOrientation.isLandscape {
        UIView.animate(withDuration: duration, animations: {
            self.moveUp(view: self.containerViewBot)
            self.moveUp(view: self.containerViewBotBack)
        }) { (_) in
            self.containerViewBotBack.isHidden = false
            self.containerViewBot.isHidden = true
        }
    } else {
        UIView.animate(withDuration: duration, animations: {
            self.moveRight(view: self.containerViewBot)
            self.moveRight(view: self.containerViewBotBack)
        }) { (_) in
            self.containerViewBotBack.isHidden = false
            self.containerViewBot.isHidden = true
        }
    }
    isMainContainer = false
}

func goToResults() {
    let duration = 0.5
    if UIApplication.shared.statusBarOrientation.isLandscape {
        UIView.animate(withDuration: duration, animations: {
            self.moveDown(view: self.containerViewBot)
            self.moveDown(view: self.containerViewBotBack)
        }) { (_) in
            self.containerViewBot.isHidden = false
            self.containerViewBotBack.isHidden = true
        }
    } else {
        UIView.animate(withDuration: duration, animations: {
            self.moveLeft(view: self.containerViewBot)
            self.moveLeft(view: self.containerViewBotBack)
        }) { (_) in
            self.containerViewBot.isHidden = false
            self.containerViewBotBack.isHidden = true
        }
    }
    isMainContainer = true
}

我在覆盖 viewWillTransition(...) 时调用“resetPositions()”命令

Answer 1

您可以通过以下方式检测设备旋转并重新定位您的项目。

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    NotificationCenter.default.addObserver(self, selector: #selector(deviceRotated), name: NSNotification.Name.UIDeviceOrientationDidChange, object: nil)
}

override func viewWillDisappear(_ animated: Bool) {
    NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIDeviceOrientationDidChange, object: nil)
}

func deviceRotated(){
    if UIDeviceOrientationIsLandscape(UIDevice.current.orientation) {
        print("Landscape")
        // Resize other things
    }
    if UIDeviceOrientationIsPortrait(UIDevice.current.orientation) {
        print("Portrait")
        // Resize other things
    }
}