ios - 默认纵向，一些特殊的屏幕如何自动旋转或强制某些屏幕横向？

Question

在我的应用程序中，方向默认为纵向，但在某些特殊屏幕中，我希望 View Controller 自动旋转或强制方向为横向。

在 AppDelegate.swift 中:

class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?

// portrait by default
var interfaceOrientations:UIInterfaceOrientationMask = .portrait {
    didSet{
        // force to portrait
        if interfaceOrientations == .portrait {
            UIDevice.current.setValue(UIInterfaceOrientation.portrait.rawValue,
                                      forKey: "orientation")
        }
            // force to landscape
        else if !interfaceOrientations.contains(.portrait){
            UIDevice.current.setValue(UIInterfaceOrientation.landscapeRight.rawValue,
                                      forKey: "orientation")
        }
    }
}

func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
    return interfaceOrientations
}

仅在纵向 vc 中:

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    appDelegate.interfaceOrientations = .portrait
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)

    appDelegate.interfaceOrientations = .portrait
}

在自动旋转的 vc 中:

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    appDelegate.interfaceOrientations = .allButUpsideDown
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)

    appDelegate.interfaceOrientations = .portrait
}

仅在横向 vc 中:

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    appDelegate.interfaceOrientations = [.landscapeLeft, .landscapeRight]
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)

    appDelegate.interfaceOrientations = .portrait
}

但它仍然有错误...帮帮我

Answer 1

你应该强制旋转:

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

您还必须启用自动旋转

override var shouldAutorotate: Bool{
    return true
}

当然，在您的项目设置中，您必须同时启用纵向和横向模式。