在通知中播放歌曲

Question

我想播放一首歌曲。当有通知时。当应用程序处于前景模式时，我的代码工作正常。我想在应用程序处于后台模式时播放歌曲。请帮忙。

Answer 1

添加自定义的声音到本地通知

雨燕3.0

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any]) { 
    var state: UIApplicationState = application.applicationState 
    if state == .active { 
     var soundID: SystemSoundID 
     var mainBundle: CFBundleRef = CFBundleGetMainBundle() 
     var ref: CFURLRef? = CFBundleCopyResourceURL(mainBundle, ("mySoundName.wav" as? CFString), nil, nil) 
     AudioServicesCreateSystemSoundID(ref, soundID) 
     AudioServicesPlaySystemSound(soundID) 
    } 
    else { 
     // Push Notification received in the background 
    } 
} 

推送通知 一下添加到有效载荷..

{ 
aps = 
{ 
    alert = "message"; 
    sound = "pushSound.caf";//this file will have to your bundle 
    }; 
} 

Answer 2

你需要做一些修改在plist文件中。

1.）将所需背景模式设置为App播放音频。

2）套装应用程序不能在后台运行到YES

代码

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any]) { 
var state: UIApplicationState = application.applicationState 
if state == .active { 
    print("User Info : \(userInfo.description)") 
    print("User Info Alert Message : \(userInfo["aps"]["alert"])") 
    var messageString: String? = "\((userInfo["aps"] as? String)?["alert"] as? String)" 
    var playSoundOnAlert: String? = "\((userInfo["aps"] as? String)?["sound"] as? String)" 
    var url = URL(fileURLWithPath: "\(Bundle.main.resourcePath)/\(playSoundOnAlert)") 
    var error: Error? 
    audioPlayer = try? AVAudioPlayer(contentsOf: url) 
    audioPlayer.numberOfLoops = 0 
    audioPlayer.play() 
} 
}