Swift 2: 屏幕旋转仅适用于全屏视频

Question

这是一个热门问题，但我找不到任何适用于 Swift 2.

的解决方案

该应用仅支持纵向。但是在观看全屏视频（例如 YouTube）时，用户应该能够旋转到横向。

在Objective C上，这是最简单的解决方案，我用了很长时间：

AppDelegate file:

static NSString * const VIDEO_CONTROLLER_CLASS_NAME_IOS7 = @"MPInlineVideoFullscreenViewController";
static NSString * const VIDEO_CONTROLLER_CLASS_NAME_IOS8 = @"AVFullScreenViewController";

- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window{

    if ([[window.rootViewController presentedViewController] isKindOfClass:NSClassFromString(VIDEO_CONTROLLER_CLASS_NAME_IOS7)] ||
[[window.rootViewController presentedViewController] isKindOfClass:NSClassFromString(VIDEO_CONTROLLER_CLASS_NAME_IOS8)]) {

        return UIInterfaceOrientationMaskAllButUpsideDown;

    } else {

    return UIInterfaceOrientationMaskPortrait;

    }

}

当视频全屏播放时，这允许所有方向。否则，仅纵向。

但我很难在 Swift 上完成这项工作。在 Swift 上播放全屏视频时是否可以使屏幕旋转？

Answer 1

这样的事情怎么样？

func application(application: UIApplication, supportedInterfaceOrientationsForWindow window: UIWindow?) -> UIInterfaceOrientationMask {

        var classesToCheckFor = [AnyClass]()

        if let ios7Class = NSClassFromString("MPInlineVideoFullscreenViewController") {
            classesToCheckFor.append(ios7Class)
        }

        if let ios8Class = NSClassFromString("AVFullScreenViewController") {
            classesToCheckFor.append(ios8Class)
        }

        for classToCheckFor in classesToCheckFor {
            if (self.window?.rootViewController?.presentedViewController?.isKindOfClass(classToCheckFor) != nil) {
                return .AllButUpsideDown
            }
        }

        return .Portrait
    }

NSClassFromString 可能 return nil，但 isKindOfClass 需要一个非可选的 AnyClass。我正在检查是否每个 class 都可以加载到平台上，将加载的 classes 添加到数组，然后遍历 classes 的数组，检查查看 presentedViewController 是否属于 class。如果是，我们 return .AllButUpsideDown。如果 class 都无法加载，或者 presentedViewController 不是 class 中的任何一个，那么我们 return .Portrait.

Answer 2

这里是 iOS 10 的解决方案：

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

if let presentedViewController = window?.rootViewController?.presentedViewController {
    let className = String(describing: type(of: presentedViewController))
    if ["MPInlineVideoFullscreenViewController", "MPMoviePlayerViewController", "AVFullScreenViewController"].contains(className)
    {
        return UIInterfaceOrientationMask.allButUpsideDown
    }
}

return UIInterfaceOrientationMask.portrait

}

Answer 3

我正在根据其他人的回答使用此代码

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

        if let videoClass = NSClassFromString("AVFullScreenViewController"), self.window?.rootViewController?.presentedViewController?.isKind(of: videoClass) != nil {
            return .allButUpsideDown
        }

    return [.portrait]
  }

Answer 4

Swift Natividad Lara Diaz 2.2 版回答：

if let presentedViewController = window?.rootViewController?.presentedViewController {
    let className = String(presentedViewController.dynamicType)
    if ["MPInlineVideoFullscreenViewController", "MPMoviePlayerViewController", "AVFullScreenViewController"].contains(className) {
       return UIInterfaceOrientationMask.All
   }
}

Answer 5

我发现这个解决方案很容易工作 swift 3:

在AppDelegate.swift中添加这个函数：

func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
    if window == self.window {
        return .portrait
    } else {
        return .allButUpsideDown
    }
}

Swift 2: 屏幕旋转仅适用于全屏视频

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