我能够找到解决方法/破解/解决方案。我将我的应用程序锁定为纵向，但覆盖了 AppDelegate 方法以获得允许的方向。
class AppDelegate: UIResponder, UIApplicationDelegate {
...
func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
return OrientationManager.allowedOrientations
}
...
}
我创建了一个OrientationManager，它只是一个帮助类，允许我强制旋转并更改允许的方向。
class OrientationManager {
/// The currently allowed orientations of the application (default: .portrait)
static var allowedOrientations: UIInterfaceOrientationMask = .portrait
/**
* Method to force the current orientation of the device.
*
* - Parameter orientation: The orientation to change to.
*
* - Warning: This method uses setValue(_, forKey:) which accesses values that may change in the future
*/
static func forceOrientation(_ orientation: UIInterfaceOrientation) {
let orientationRawValue = orientation.rawValue
UIDevice.current.setValue(orientationRawValue, forKey: "orientation")
UINavigationController.attemptRotationToDeviceOrientation()
}
}
我需要做的最后一件事是弄清楚视频何时进入和退出全屏。我发现一些通知似乎在视频进入和退出全屏时可靠地触发。发生这种情况时，我启用视图旋转功能，这允许它转到全屏视频后面的横向。视频关闭后，我的视图现在（不幸地）以横向显示，然后我可以强制方向并将其重新锁定为纵向。
在UIViewController 带有webview：
class WebViewWithVideoViewController: UIViewController {
...
// MARK: Properties
var videoDidFullScreenNotification: NSObjectProtocol?
var videoDidMinimizeNotification: NSObjectProtocol?
...
// MARK: Lifecycle
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
self.beginObserving()
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
self.endObserving()
}
// MARK: Observers
func beginObserving() {
// This is a solution to the video causing a half black screen when the device is rotated to landscape.
// The outline of the solution is that when the video is put into full screen mode, we update the
// available orientations to include both landscape directions. Upon the video being closed,
// we force the device orientation back to portrait and then lock it back to portrait only.
// This seems to work because the UIViewController is actually in landscape once complete
// and then it animates back to the portrait orientation and seems to keep the proper ratios
// and sizes.
if self.videoDidFullScreenNotification == nil {
self.videoDidFullScreenNotification = NotificationCenter.default.addObserver(
forName: UIWindow.didBecomeVisibleNotification,
object: self.view.window,
queue: nil
) { notification in
OrientationManager.allowedOrientations = .allButUpsideDown
}
}
if self.videoDidMinimizeNotification == nil {
self.videoDidMinimizeNotification = NotificationCenter.default.addObserver(
forName: UIWindow.didBecomeHiddenNotification,
object: self.view.window,
queue: nil
) { notification in
OrientationManager.forceOrientation(.portrait)
OrientationManager.allowedOrientations = .portrait
}
}
}
func endObserving() {
if let videoDidFullScreenNotification = self.videoDidFullScreenNotification {
NotificationCenter.default.removeObserver(videoDidFullScreenNotification)
}
if let videoDidMinimizeNotification = self.videoDidMinimizeNotification {
NotificationCenter.default.removeObserver(videoDidMinimizeNotification)
}
}
...
}
这似乎解决了在嵌入视频进入和退出全屏后屏幕显示半黑的问题。不幸的是，当您从全屏视频返回时，会有一个轻微的动画，但对于一个非常奇怪的错误来说，这是一个小小的牺牲。
希望这可以帮助其他人解决这个（或类似的问题）和快乐的编码！