ios - 收到本地通知时无法播放音乐，当应用程序快速处于后台状态时

Question

我正在安排一个本地通知作为应用程序的闹钟，我在其中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，只有默认的通知音乐，即只有一次，不会重复，并且会发生单一振动。

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

}

Answer 1

在 AppDelegate.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，使用以下函数安排您的通知，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)
}