当使用AVPLayer播放视频时，它会停止背景音乐ios

Question

我正在使用AVPlayer播放视频，它会阻止iPhone的背景音乐。请帮我解决

let item1 = AVPlayerItem.init(URL: NSURL(string:path))
player = AVPlayer(playerItem: item1)
layer?.player = player;
player?.play()

Answer 1

我的电影是为了动画;他们没有声音。为了让其他声音继续播放，在Swift：

    // None of our movies should interrupt system music playback.
    _ = try? AVAudioSession.sharedInstance().setCategory(AVAudioSession.Category.playback, mode: .default, options: .mixWithOthers)

感谢Marcus Adams的原始答案。

Answer 2

使用允许混合的category for the AVAudioSession，例如AVAudioSessionCategoryPlayback和添加AVAudioSessionCategoryOptionMixWithOthers。

来自文档：

• AVAudioSessionCategoryOptionMixWithOthers 将此会话中的音频与来自其他活动会话的音频混合。 仅在会话类别为AVAudioSessionCategoryPlayAndRecord或AVAudioSessionCategoryPlayback时有效。 （如果会话类别是AVAudioSessionCategoryAmbient，则隐含。） 如果您在使用此选项时激活会话，则应用的音频不会中断来自其他应用（例如音乐应用）的音频。如果不使用此选项（或可隐式混合的类别），则激活会话将中断其他不可混合的会话。 适用于iOS 6.0及更高版本。

Answer 3

在快速4.2请尝试这一个。

do {
        try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, mode: AVAudioSessionModeDefault, options: .mixWithOthers)
        try AVAudioSession.sharedInstance().setActive(true)
   } catch {
        print(error)
   }

Answer 4

根据Apple的说法

https://developer.apple.com/documentation/avfoundation/media_assets_playback_and_editing/creating_a_basic_video_player_ios_and_tvos/playing_audio_from_a_video_asset_in_the_background

如果要继续播放音频，请在进入后台时断开AVPlayer实例与演示文稿的连接，并在返回前台时重新连接。

func applicationDidEnterBackground(_ application: UIApplication) {

     // Disconnect the AVPlayer from the presentation when entering background

     // If presenting video with AVPlayerViewController
     playerViewController.player = nil

     // If presenting video with AVPlayerLayer
     playerLayer.player = nil
}

func applicationWillEnterForeground(_ application: UIApplication) {
     // Reconnect the AVPlayer to the presentation when returning to foreground

    // If presenting video with AVPlayerViewController
    playerViewController.player = player

    // If presenting video with AVPlayerLayer
    playerLayer.player = player
}

例如，使用AVPlayer的ViewController

步骤1

启用背景模式用于图片中的音频，AirPlay和图片功能

第2步

AppDelegate.swift

do {
        try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, with: .mixWithOthers)
        print("Playback OK")
        try AVAudioSession.sharedInstance().setActive(true)
        print("Session is Active")
    } catch {
        print(error)
    }

步骤：3

YourViewcontroller.swift

override func viewDidLoad() {
    super.viewDidLoad()
    addPlayerNotifications()
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)
    removePlayerNotifations()
}

 func addPlayerNotifications() {

    NotificationCenter.default.addObserver(self, selector: #selector(applicationWillEnterForeground), name: NSNotification.Name.UIApplicationWillEnterForeground, object: nil)
    NotificationCenter.default.addObserver(self, selector: #selector(applicationDidEnterBackground), name: NSNotification.Name.UIApplicationDidEnterBackground, object: nil)
}

func removePlayerNotifations() {

    NotificationCenter.default.removeObserver(self, name:NSNotification.Name.UIApplicationWillEnterForeground, object: nil)
    NotificationCenter.default.removeObserver(self, name:NSNotification.Name.UIApplicationDidEnterBackground, object: nil)
}

//App enter in forground.
@objc func applicationWillEnterForeground(_ notification: Notification)        {

    yourPlayerLayer.player = yourplayer

}

//App enter in forground.
@objc func applicationDidEnterBackground(_ notification: Notification) {

    yourPlayerLayer.player = nil

}