使用创建自定义视频播放器时AVPlayer
+ AVPlayerLayer
+ AVPictureInPictureController
对于运行 iOS 14(beta 7)的 iPhone,当应用程序进入后台后,视频不会自动进入画中画模式player.start()
从 UIButton 操作调用。
使用以下命令不会重现该问题AVPlayerViewController
这似乎表明有问题AVPictureInPictureController
一般来说,在 iOS 14 上,但我想知道是否有其他人遇到过这个问题并知道任何解决方法。我也已向 Apple 提交了此问题rdar://8620271
示例代码。
import UIKit
import AVFoundation
import AVKit
class ViewController: UIViewController {
private let player = AVPlayer(url: URL(string: "https://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4")!)
private var pictureInPictureController: AVPictureInPictureController!
private var playerView: PlayerView!
private var playButton: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
playerView = PlayerView(frame: CGRect(x: 0, y: 44, width: view.bounds.width, height: 200))
playerView.backgroundColor = .black
playerView.playerLayer.player = player
view.addSubview(playerView)
playButton = UIButton(frame: CGRect(x: view.bounds.midX - 50, y: playerView.frame.maxY + 20, width: 100, height: 22))
playButton.setTitleColor(.blue, for: .normal)
playButton.setTitle("Play", for: .normal)
playButton.addTarget(self, action: #selector(play), for: .touchUpInside)
view.addSubview(playButton)
pictureInPictureController = AVPictureInPictureController(playerLayer: playerView.playerLayer)
do {
let audioSession = AVAudioSession.sharedInstance()
try audioSession.setCategory(.playback)
try audioSession.setMode(.moviePlayback)
try audioSession.setActive(true)
} catch let e {
print(e.localizedDescription)
}
}
@objc func play() {
player.play()
}
}
class PlayerView: UIView {
override class var layerClass: AnyClass {
return AVPlayerLayer.self
}
var playerLayer: AVPlayerLayer! {
return layer as? AVPlayerLayer
}
}
问题的根本原因最终有两个:
-
AVAudioSession.sharedInstance().setActive(true)
必须被称为before the AVPictureInPictureController
已初始化。
-
框架尺寸为AVPlayerLayer
宽高比必须不大于 16/9(作为单独的错误提交,rdar://8689203
)
-
对于 iPad,视频的宽度必须与设备相同(在任何给定方向)。没有单独的雷达,因为苹果已经承认了另一个错误。
(上面的例子中没有出现第二个问题)
苹果已经承认了这些错误,并向我报告它们已经/将被修复(雷达实际上会产生回复的罕见情况!)
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