强制进行横向模式而不设置自动旋转

Question

我有一个简单的例子：

视图中间的一个按钮。我想按下该按钮强制横向模式，然后再次按下强制纵向模式，但我不希望它自动旋转。我知道如果我设置shouldAutorotate -> true，它会起作用，但在我的情况下，我不想要自动旋转模式。

class ViewController: UIViewController {

    var isLanscape = false

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    @IBAction func rotate(_ sender: Any) {
        isLanscape = !isLanscape
        if isLanscape == true {
            let value = UIInterfaceOrientation.landscapeRight.rawValue
            UIDevice.current.setValue(value, forKey: "orientation")
        } else {
            let value = UIInterfaceOrientation.portrait.rawValue
            UIDevice.current.setValue(value, forKey: "orientation")
        }

    }

    override var shouldAutorotate: Bool {
        return false
    }
}

Answer 1

最后，我找到了这种情况的解决方案。

如果shouldAutorotate -> false，你永远无法旋转屏幕，所以我在这里做了一些技巧。

class ViewController: UIViewController {

    var isLanscape = false
    var shouldRotate = false

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    @IBAction func rotate(_ sender: Any) {
        isLanscape = !isLanscape
        shouldRotate = true
        if isLanscape == true {
            let value = UIInterfaceOrientation.landscapeRight.rawValue
            UIDevice.current.setValue(value, forKey: "orientation")
        } else {
            let value = UIInterfaceOrientation.portrait.rawValue
            UIDevice.current.setValue(value, forKey: "orientation")
        }
        self.shouldRotate = false
    }

    override var shouldAutorotate: Bool {
        let orientation = UIDevice.current.value(forKey: "orientation") as! Int
        if (orientation == 1 || orientation == 3) && shouldRotate == true {
            return true
        } else {
            return false
        }
    }

    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return [.portrait, .landscapeRight]
    }
}