用户获取推送通知时如何播放自定义声音文件？
问题描述：
我在应用程序包中有一个声音文件，我希望在用户获得推送通知时播放该声音文件。
I have a sound file in the app bundle, i want to play that sound file when user will get push notification.
如果是，是否可以在iOS中播放那么请建议实现这一目标的方法。
IS it possible in iOS if yes, then please suggest the way to achieve this.
谢谢，
答
要播放此声音，您必须在通知有效负载中指定声音的文件名。例如，假设您已将一个名为example.caf的声音文件添加到您的应用程序中，我们可以使用通知有效负载播放此声音，如下所示：
To play this sound you must specify the filename of the sound in the notification payload. For example, lets say you've added a sound file named example.caf into your application, we can play this sound with the notification payload as below:
{
aps =
{
alert = "test example notification message";
sound = "example.caf";
};
}
然后，当您的通知到达时，自定义声音将会播放。
Then the custom sound will play when your notification arrives.