[英]Sync video in AVPlayerLayer and AVPlayerViewController
我正在使用AVPlayer
来显示播放视频,其中包含一个URL
。 它有两个部分:
1.首先,我使用AVPlayerLayer
将AVPlayer
嵌入到视图的子层中,即
var player: AVPlayer?
func configure() {
let urlString = "https://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4"
if let url = URL(string: urlString) {
self.player = AVPlayer(url: url)
let playerLayer = AVPlayerLayer(player: self.player)
playerLayer.frame = self.view.bounds
self.view.layer.addSublayer(playerLayer)
player.play()
}
}
上面的代码工作正常,视频正在播放。
2.其次,在UIButton
tap上,我使用我之前创建的相同AVPlayer
实例呈现AVPlayerViewController
,即
@IBAction func onTapVideoButton(_ sender: UIButton) {
self.player?.pause()
let controller = AVPlayerViewController()
controller.player = self.player
self.present(controller, animated: true) {
self.player?.play()
}
}
我面临的问题是,在AVPlayerViewController
打开后,视频停止播放但音频仍在播放。
我想要的是同步 AVPlayerLayer
和AVPlayerViewController
的视频 。
我认为将已经创建的播放器共享到AVPlayerViewController时会出现问题。 我不知道为什么要停止,但如果你为该控制器创建一个新的AVPlayer,它就不会发生。 同步播放器和AVPlayerViewController的方法可能是这样的:
首先,您创建一个通知名称,当AVPlayerViewController被解雇时您将使用该通知名称(苹果不会让您知道用户何时解雇AVPlayerViewController):
extension Notification.Name {
static let avPlayerDidDismiss = Notification.Name("avPlayerDidDismiss")
}
然后,您将扩展AVPlayerViewController以在要解除时发布此通知并发送用户离开视频的时间:
extension AVPlayerViewController {
open override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
if let seekTime = player?.currentTime() {
let userInfo = ["seekTime": seekTime]
NotificationCenter.default.post(name: .avPlayerDidDismiss, object: nil, userInfo: userInfo)
}
}
}
在ViewController中,您可以观察到该通知,获取您想要的seekTime并使用它来设置您的avPlayer:
class ViewController: UIViewController {
var player: AVPlayer?
deinit {
NotificationCenter.default.removeObserver(self)
}
override func viewDidLoad() {
super.viewDidLoad()
configure()
NotificationCenter.default.addObserver(self, selector: #selector(avPlayerDidDismiss), name: .avPlayerDidDismiss, object: nil)
}
func configure() {
self.player = getPlayer()
let playerLayer = AVPlayerLayer(player: self.player)
playerLayer.frame = self.view.bounds
self.view.layer.addSublayer(playerLayer)
self.player?.play()
}
@IBAction func onTapVideoButton(_ sender: UIButton) {
self.player?.pause()
let controllerPlayer = getPlayer()
controllerPlayer.currentItem?.seek(to: self.player!.currentTime(), completionHandler: nil)
let controller = AVPlayerViewController()
controller.player = controllerPlayer
self.present(controller, animated: true, completion: {
controller.player?.play()
})
}
func getPlayer() -> AVPlayer {
let url = URL(string: "https://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4")!
return AVPlayer(url: url)
}
@objc
private func avPlayerDidDismiss(_ notification: Notification) {
if let seekTime = notification.userInfo?["seekTime"] as? CMTime {
player?.currentItem?.seek(to: seekTime, completionHandler: nil)
player?.play()
}
}
}
缺点:它将为每个AVPlayerViewController发送通知。 您需要在需要此信息时将您添加为观察者。 希望它可以提供帮助。
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