[英]Sync video in AVPlayerLayer and AVPlayerViewController
我正在使用AVPlayer
來顯示播放視頻,其中包含一個URL
。 它有兩個部分:
1.首先,我使用AVPlayerLayer
將AVPlayer
嵌入到視圖的子層中,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()
}
}
上面的代碼工作正常,視頻正在播放。
2.其次,在UIButton
tap上,我使用我之前創建的相同AVPlayer
實例呈現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()
}
}
我面臨的問題是,在AVPlayerViewController
打開后,視頻停止播放但音頻仍在播放。
我想要的是同步 AVPlayerLayer
和AVPlayerViewController
的視頻 。
我認為將已經創建的播放器共享到AVPlayerViewController時會出現問題。 我不知道為什么要停止,但如果你為該控制器創建一個新的AVPlayer,它就不會發生。 同步播放器和AVPlayerViewController的方法可能是這樣的:
首先,您創建一個通知名稱,當AVPlayerViewController被解雇時您將使用該通知名稱(蘋果不會讓您知道用戶何時解雇AVPlayerViewController):
extension Notification.Name {
static let avPlayerDidDismiss = Notification.Name("avPlayerDidDismiss")
}
然后,您將擴展AVPlayerViewController以在要解除時發布此通知並發送用戶離開視頻的時間:
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,您可以觀察到該通知,獲取您想要的seekTime並使用它來設置您的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()
}
}
}
缺點:它將為每個AVPlayerViewController發送通知。 您需要在需要此信息時將您添加為觀察者。 希望它可以提供幫助。
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