iOS 8 - 在关闭全屏AVPlayerViewController时将方向改回肖像

Question

我的应用程序是一个仅限肖像的应用程序,但我有一个视图控制器,它使用AVPlayerViewController显示实时流.

为了允许横向播放该播放器的全屏视图,我在AppDelegate.swift中编写了这个方法:

func application(application: UIApplication, supportedInterfaceOrientationsForWindow window: UIWindow?) -> Int {
    var orientation =  UIInterfaceOrientationMask.Portrait

    if let presentedController = window?.rootViewController?.presentedViewController? {

        if presentedController.isKindOfClass( NSClassFromString("AVFullScreenViewController").self ) {
            orientation = .AllButUpsideDown
        } else if let navController = presentedController as? UINavigationController {
            if navController.topViewController.isKindOfClass( NSClassFromString("AVFullScreenViewController").self ) {
               orientation = .AllButUpsideDown
            }
        }
    }

    return  Int(orientation.rawValue)
}

这就是我调用初始化我的AVPlayer的方法:

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "showLiveStream" {

        SVProgressHUD.show()
        var queue: dispatch_queue_t = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)

        dispatch_async(queue, {
            let streamURL = NSURL(string: liveStreamURL)
            let playerItem = AVPlayerItem(URL: streamURL)
            let player = AVPlayer(playerItem: playerItem)

            dispatch_async(dispatch_get_main_queue(), {
                SVProgressHUD.dismiss()
                var playerViewController = segue.destinationViewController as AVPlayerViewController
                playerViewController.player = player
            })
        })
    }
}

问题:当我打开播放器的全屏视图,然后更改为横向,然后单击"完成"以关闭全屏视图,我的应用程序保持在横向.但我想让它再次旋转成肖像.我怎样才能做到这一点？

Answer 1

而不是application(_:supportedInterfaceOrientationsForWindow:)尝试supportedInterfaceOrientations()在每个视图控制器上实现。例如：

override func supportedInterfaceOrientations() -> Int {
    return Int(UIInterfaceOrientationMask.Portrait.rawValue)
}

这将确保视图控制器无法横向显示，因此当关闭视频播放器时，它将直接返回到纵向窗口。

更新Objective-C：

- (NSUInteger)supportedInterfaceOrientations { 
    return UIInterfaceOrientationMaskPortrait; 
}