远程通知中的自定义声音 iOS 10, swift 3 [英] Custom sounds in remote notifications iOS 10, swift 3

问题描述

远程通知中的自定义声音有一个大问题.

I've a big problem with a custom sounds in remote notifications.

这是我的场景:

我有两种类型的通知，每一种都有自定义声音.当我的应用程序处于非活动状态或在后台时，声音就像一个魅力，操作系统在通知中心横幅警报中显示通知.

I've two types of notifications each one with a custom sound. The sound, plays like a charm, when my app is inactive or in background, and the OS shows the notification in notification center banner-alert.

当在前台状态收到通知时，我处理通知，提取 aps 声音元素并通过 AVAudioPlayer 播放声音:

When the notification is received in foreground state, I process the notification, extract the aps sound element and I play the sound via AVAudioPlayer:

func playSound(_ sound: String) {
    myLog("Let's play sound \(sound)")

    // Plays new sound file
    DispatchQueue.main.async  {
        // Stops last player if playing
        if (self.soundPlayer != nil) {
            if (self.soundPlayer.isPlaying) {
                self.soundPlayer.stop()
            }
        }
        do {
            let path = Bundle.main.path(forResource: sound, ofType:nil)!
            let url = URL(fileURLWithPath: path)
            self.soundPlayer = try AVAudioPlayer(contentsOf: url)
            self.soundPlayer.delegate = self
            if (self.soundPlayer.prepareToPlay()) {
                self.soundPlayer.play()
            }
        } catch let error  {
            myLog("Error playing .caf file: \(error)")
        }
    }

}

问题由此开始.如果应用程序返回后台 - 当我的播放器代码执行时处于非活动状态，通知中心的操作系统警报将不再播放自定义声音.

And here start the problem. If the app returns to background - inactive when my player code is executed the OS alert in notification center never plays again the custom sounds.

总结:

• 应用处于非活动状态 - 后台收到通知 -> 自定义声音播放正常.

• App inactive - background it receives notification -> Custom sounds plays ok.

应用前台收到通知 -> 代码通过 playSound 函数播放声音，然后如果应用在后台非活动状态下收到其他通知，操作系统播放默认通知声音.

App foreground it receives notification -> code plays sound via playSound function then if app receives other notification in background-inactive state OS plays default notification sound.

提前致谢.

推荐答案

问题已自动解决.删除应用程序，声音恢复正常.

Problem auto-solved. Deleting app, sound return to normal behaviour.

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