Question

我正在创建一个音频应用程序，我希望音频能够继续在后台播放。（屏幕关闭）

在xcode上启用了后台模式，我实现了“AVAudioSession.sharedInstance”，但是在屏幕关闭后音频不会继续播放。有什么想法解决这个问题吗？

        var player:AVAudioPlayer!

        init(withStartingClosure block1:@escaping(_ dict:[String:Any],_ index:Int) -> Void,andStopingClosure block2:@escaping(_ index:Int) -> Void,finishedAllClosure block3:((_ finished:Bool) -> Void)? = nil) {
            self.didStartPlaying = block1
            self.didStopPlaying = block2
            self.didFinishPlaying = block3
        }
        deinit {
            self.mode = .stopped
        }
    }
        extension AudioPlayer {
        func getURL(ofAudio name:String) -> URL {
            let url = URL(string: name)!
            let nm = url.deletingPathExtension().absoluteString
            let type = url.pathExtension
            let path = Bundle.main.url(forResource: nm, withExtension: type)!
            return path
        }

        func setupPlayer(withData data:[String:Any]){
            let name = data["audio"] as! String
            var idx = self.currentIndex - 1
            if idx < -1 {
                idx = -1
            }
            print("\nCurrentIndex = \(idx),and Audio is = \(data)")
            let path = self.getURL(ofAudio: name)
            do {
                try self.setupAudioSession()
                self.player = try AVAudioPlayer(contentsOf: path)
                self.player.delegate = self
                if self.player.prepareToPlay() == true {
                    self.player.play()
                    self.didStartPlaying?(data, idx)
                }else{
                    print("----------Can't Play \(data)")
                }
            }
            catch {
                print(error.localizedDescription)
                let alert = UIAlertView(title: "Error!", message: error.localizedDescription, delegate: nil, cancelButtonTitle: "OK")
                alert.show()
            }


        }

   // func backgroundSession()
             func backgroundSession() {
                let audioSession = AVAudioSession.sharedInstance()
                do{
                    try audioSession.setCategory(AVAudioSessionCategoryPlayback)
                }
                catch {
                }
            }

Answer 1

您可以将其称为功能......

func backgroundSession() {
    var audioSession = AVAudioSession.sharedInstance()
    do{
      try audioSession.setCategory(AVAudioSessionCategoryPlayback)
    }
    catch {  
    }
}

Answer 2

确保在Info.plist中＆＃34; UIBackgroundModes＆＃34;密钥包括＆＃34;音频＆＃34;值。

此外，我建议按以下顺序使用AVAudioSession共享实例和AVAudioPlayer实例：

配置AVAudioSession共享实例。
创建第一个AVAudioPlayer实例并播放它。
停止第一次。
创建第二个AVAudioPlayer实例并播放它。
停止第二次。
...

希望它有所帮助。

实现音频时出错

2 个答案: