收到本地通知时无法播放音乐，当应用程序处于后台状态时

Posted 2023-03-15

【中文标题】收到本地通知时无法播放音乐，当应用程序处于后台状态时

【英文标题】：Not able to play the music when recived LocalNotification, when app is in background state in swift

【发布时间】：2019-10-14 04:49:56

【问题描述】：

我正在安排一个本地通知作为应用程序的警报，我正在设置收到本地通知时的音乐和振动。当应用程序处于前台状态时，一切正常，播放音乐，振动。

但是当应用程序处于后台状态时，只会出现默认通知音乐，即仅一次不重复且会发生单次振动。

func application(_ application: UIApplication, didReceive notification: UILocalNotification) 

    //show an alert window
    var isSnooze: Bool = false
    var soundName: String = ""
    var index: Int = -1
    if let userInfo = notification.userInfo 
        isSnooze = userInfo["snooze"] as! Bool
        soundName = userInfo["soundName"] as! String
        index = userInfo["index"] as! Int
    

    playSound(soundName)
            let storyboard = UIStoryboard(name: "Main", bundle: nil)
            let mainVC = storyboard.instantiateViewController(withIdentifier: "HomeViewController") as? HomeViewController
            mainVC?.notification = notification
            mainVC?.isFromNotificationDelegate = true

    let nav = UINavigationController(rootViewController: mainVC!)
            self.window?.rootViewController = nav

【参考方案1】：

在 AppDellegate.swift 中注册通知

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool 
    application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes: .Sound | .Alert | .Badge, categories: nil))
    return true

现在，使用以下功能安排您的通知，它会在收到通知时自动播放您的自定义声音

func localnotification (firedate:NSDate)  
    var localNotification:UILocalNotification = UILocalNotification()
    localNotification.fireDate = firedate
    localNotification.alertBody = "time to woke up"
    localNotification.soundName = "alarm.wav"

    UIApplication.sharedApplication().scheduleLocalNotification(localNotification)

【讨论】：

应用在后台时会播放吗？

是的，它会播放，用你的文件名替换声音名称。

检查用默认声音替换声音然后看看它是否工作