iOS 強制螢幕轉向(force view orientation)

最近一個專案的需求，在整個專案裡的某一個View要強制轉成橫的，Google了好久，卡了1天才解決這個需求

1. 在Targets裡面要記得設定App支援的螢幕方向，Targets->Deployment Info->Device Orientation

2. 在要被強制轉向的View裡加入以下的code，做法就是進入viewDidLoad的時候把原本的螢幕方向記下來，然後轉成你要的方向，在viewWillDisappear的時候轉回來，override var shouldAutorotate, supportedInterfaceOrientations, preferredInterfaceOrientationForPresentation

    //記錄原本的螢幕方向

    var oldOrientation: Int = 0

    

    override func viewDidLoad() {

        super.viewDidLoad()

        

        //記下原本的螢幕方向

        oldOrientation = UIDevice.current.orientation.rawValue

        

        //強制landscapeRight

        UIDevice.current.setValue(UIInterfaceOrientation.landscapeRight.rawValue, forKey: "orientation")

    }

    

    override var shouldAutorotate:Bool {

        return false

    }

    

    override var supportedInterfaceOrientations:UIInterfaceOrientationMask {

        return UIInterfaceOrientationMask.landscapeRight

    }

    

    override var preferredInterfaceOrientationForPresentation:UIInterfaceOrientation {

        return UIInterfaceOrientation.landscapeRight

    }

    

    override func viewWillDisappear(_ animated: Bool) {

        super.viewDidDisappear(animated)

        //轉回來原來的方向

        UIDevice.current.setValue(oldOrientation, forKey: "orientation")

    }

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