應用程序在后台Swift Xcode不能播放音樂

Question

我已經編寫了這段代碼來在我的應用程序運行時播放音樂，但是當我轉到另一個應用程序時，音樂就會停止。

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    do {
        try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
        print("AVAudioSession Category Playback OK")
        do {
            try AVAudioSession.sharedInstance().setActive(true)
            print("AVAudioSession is Active")
        } catch let error as NSError {
            print(error.localizedDescription)
        }
    } catch let error as NSError {
        print(error.localizedDescription)
    }
    playBackgroundMusic("anti.mp3")


}

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

import AVFoundation

var backgroundMusicPlayer = AVAudioPlayer()

func playBackgroundMusic(filename: String) {
    let url = NSBundle.mainBundle().URLForResource(filename, withExtension: nil)
    guard let newURL = url else {
        print("Could not find file: \(filename)")
        return
    }
    do {
        backgroundMusicPlayer = try AVAudioPlayer(contentsOfURL: newURL)
        backgroundMusicPlayer.numberOfLoops = -1
        backgroundMusicPlayer.prepareToPlay()
        backgroundMusicPlayer.play()
    } catch let error as NSError {
        print(error.description)
    }
}

我還在所需的背景模式下在info.plist中添加了音頻字符串。

我也得到了此輸出，因此我認為在使用其他應用程序時它將繼續在后台播放，但事實並非如此。

AVAudioSession Category Playback OK
AVAudioSession is Active
AVAudioSession Category Playback OK
AVAudioSession is Active

Answer 1

確保在background modes下在project setup下target下的capabilities下檢查Audio,Airplay and picture in picture

檢查截圖