如何检查设备是否通过airplay连接？

Question

我有问题要检查我是否连接到airplay设备，以及是否通过镜像或流连接。但是检查需要在视频开始之前完成。

如果视频已经开始，airPlayVideoActive仅返回YES。

Answer 1

这是我的解决方案

- (BOOL)isAudioSessionUsingAirplayOutputRoute
{
    /**
     * I found no other way to check if there is a connection to an airplay device
     * airPlayVideoActive is NO as long as the video hasn't started 
     * and this method is true as soon as the device is connected to an airplay device
     */
    AVAudioSession* audioSession = [AVAudioSession sharedInstance];
    AVAudioSessionRouteDescription* currentRoute = audioSession.currentRoute;
    for (AVAudioSessionPortDescription* outputPort in currentRoute.outputs){
        if ([outputPort.portType isEqualToString:AVAudioSessionPortAirPlay])
            return YES;
    }
    return NO;
}

要检查airplay连接是否正在镜像，您只需检查屏幕数量。

if ([[UIScreen screens] count] < 2)) {
    //streaming
}
else {
    //mirroring
}

如果有更好的解决方案，请告诉我

Answer 2

快速版本：

var isAudioSessionUsingAirplayOutputRoute: Bool {

    let audioSession = AVAudioSession.sharedInstance()
    let currentRoute = audioSession.currentRoute

    for outputPort in currentRoute.outputs {
        if outputPort.portType == AVAudioSessionPortAirPlay {
            return true
        }
    }

    return false
}

并检查屏幕计数：

if UIScreen.screens.count < 2 {
    //streaming
} else {
    //mirroring
}