问题描述
我正在为iOS创建可以使用MPRemoteCommandCenter进行控制的应用程序.效果很好.
I am creating an application for iOS that can be controlled using the MPRemoteCommandCenter. This works fine.
将应用程序AVAudioSession类别从AVAudioSessionCategoryPlayback更改为AVAudioSessionCategoryPlayback, withOptions: .MixWithOthers时，它将停止接收远程控制事件.很好.
When changing the application AVAudioSession category from AVAudioSessionCategoryPlayback to AVAudioSessionCategoryPlayback, withOptions: .MixWithOthers, it stops receiving remote control events. This is fine.
但是当我将类别更改回AVAudioSessionCategoryPlayback时，没有收到预期的MPRemoteCommandCenter事件.
But when I change the category back to AVAudioSessionCategoryPlayback, I do not receive events from MPRemoteCommandCenter as expected.
如何为我的应用程序恢复正在播放"状态?
How can I reclaim "Now Playing" status for my application?
推荐答案
我发现设置AVAudioSessionCategory时保留了这些选项.因此，通过先调用setCategory(AVAudioSessionCategoryPlayback, withOptions: .MixWithOthers)然后再调用setCategory(AVAudioSessionCategoryPlayback)，.MixWithOthers选项始终有效.
I did discover that when setting AVAudioSessionCategory the options are retained. So by calling setCategory(AVAudioSessionCategoryPlayback, withOptions: .MixWithOthers) first and then setCategory(AVAudioSessionCategoryPlayback) later, the .MixWithOthers option was always in effect.
我找不到AVAudioSessionCategoryOptions.None选项，但是提供一个空数组确实重置了类别选项.
I was unable to find a AVAudioSessionCategoryOptions.None option, but supplying an empty array did reset the category options.
.setCategory(AVAudioSessionCategoryPlayback, withOptions: [])
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