在 iOS10+ 中播放完成后,如何让播放器控件从锁屏中消失?

How to vanish player controls from lockscreen after the playback has finished in iOS10+?

在后台模式下播放音频时,播放器控件会出现在锁定屏幕上。音频停止时如何将其删除?如果尝试设置:

MPNowPlayingInfoCenter.default().nowPlayingInfo = nil

播放器仍在锁定屏幕上,但字段 artist/song 为空

UPD(我的音频会话代码):

在 AppDelegate 中:

func setupAudioSession() {

    let audioSession = AVAudioSession.sharedInstance()

    do {
        try audioSession.setCategory(AVAudioSessionCategoryPlayback)
        try audioSession.setActive(true)

    } catch {
        print("Setting category to AVAudioSessionCategoryPlayback failed.")
    }
}

在播放器中 class:

private func clearRemotePlayerInfo() { // call after stop button pressed
    try? AVAudioSession.sharedInstance().setActive(false)
    MPNowPlayingInfoCenter.default().nowPlayingInfo = [:]
}

TL;DR

Github 上的示例:https://github.com/JakubMazur/SO52243428


您不应该将 nil 分配给此 nowPlayingInfo

你应该做的是:

  1. 停止播放(没有必要,但最好清理您创建的内容)
  2. 将您的会话设置为不活动
  3. 清除nowPlayingInfo

因此代码将如下所示:

self.player?.stop() // Where self.player is AVAudioPlayer
try? self.session?.setActive(false, with: .notifyOthersOnDeactivation) // Where self.session is AVAudioSession. You should do it with do-catch to good error catching.
MPNowPlayingInfoCenter.default().nowPlayingInfo = [:]

它会像这样:

编辑:

我写了一个尽可能简单的例子来试试看。它在 Github https://github.com/JakubMazur/SO52243428 上可用。请随时检查它是否符合您的情况。

对我有用。

func setupNowPlaying() {
    var nowPlayingInfo = [String : Any]()
    nowPlayingInfo[MPMediaItemPropertyTitle] = "my video"
    if let image = UIImage(named: "video image") {
        nowPlayingInfo[MPMediaItemPropertyArtwork] =
            MPMediaItemArtwork(boundsSize: image.size) { size in
                return image
        }
    }
    let playerItem = self.player?.currentItem
    
    nowPlayingInfo[MPNowPlayingInfoPropertyElapsedPlaybackTime] = playerItem?.currentTime().seconds
    nowPlayingInfo[MPMediaItemPropertyPlaybackDuration] = playerItem?.asset.duration.seconds
    nowPlayingInfo[MPNowPlayingInfoPropertyPlaybackRate] = self.player?.rate
 
    
    MPNowPlayingInfoCenter.default().nowPlayingInfo = nowPlayingInfo
    
    UIApplication.shared.beginReceivingRemoteControlEvents()
    
}


func closeVideo() {
    self.player?.pause()
    
    let sessionAV = AVAudioSession.sharedInstance()
    try? sessionAV.setActive(false, options: AVAudioSession.SetActiveOptions.notifyOthersOnDeactivation)
    
    
    MPNowPlayingInfoCenter.default().nowPlayingInfo = [:]
    
    UIApplication.shared.endReceivingRemoteControlEvents()
}