ios - 使用 AVPlayer 获取 AirPlay 设备的名称

Question

在 MPMoviePlayerController 中启用 AirPlay 时，它会显示文本“此视频正在设备名称上播放”。将 AirPlay 与 AVPlayer 一起使用时，有没有办法以编程方式获取设备名称？

Answer 1

从 iOS7 AudioToolbox API 开始， currentRoute 已弃用：

Apple 改为在 AudioSession 中为您提供 currentRoute API，它允许检索它的端口信息以及以一种很好的方式收听 audioRouteChangeNotification：

NSString* airplayName = [self activeAirplayOutputRouteName];
if (airplayName) {
    //airplay is active

}

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(audioRouteHasChangedNotification:) name:AVAudioSessionRouteChangeNotification object:[AVAudioSession sharedInstance]];

（你想要得到的是of portType）：portDescriptionaudioSession.currentRoute

- (NSString*)activeAirplayOutputRouteName
{
    AVAudioSession* audioSession = [AVAudioSession sharedInstance];
    AVAudioSessionRouteDescription* currentRoute = audioSession.currentRoute;
    for (AVAudioSessionPortDescription* outputPort in currentRoute.outputs){
        if ([outputPort.portType isEqualToString:AVAudioSessionPortAirPlay])
            return outputPort.portName;
    }

    return nil;
}

- (void)audioRouteHasChangedNotification:(NSNotification*)notification
{
    //do something
}

Answer 2

在其他框架中搜索了你连接的Apple TV的名称后，我终于在AudioToolbox框架中找到了这个信息。可能还有其他方法可以做到这一点，但到目前为止我还没有找到其他方法。希望这可以帮助。

您需要导入 AudioToolbox 框架：

#import <AudioToolbox/AudioToolbox.h>

然后是当你想检测airplay是否可用时调用的方法

- (BOOL)isAirplayActive {
  CFDictionaryRef currentRouteDescriptionDictionary = nil;
  UInt32 dataSize = sizeof(currentRouteDescriptionDictionary);
  AudioSessionGetProperty(kAudioSessionProperty_AudioRouteDescription, &dataSize, &currentRouteDescriptionDictionary);

  self.deviceOutputType = nil;
  self.airplayDeviceName = nil;

  if (currentRouteDescriptionDictionary) {
    CFArrayRef outputs = CFDictionaryGetValue(currentRouteDescriptionDictionary, kAudioSession_AudioRouteKey_Outputs);
    if(CFArrayGetCount(outputs) > 0) {
      CFDictionaryRef currentOutput = CFArrayGetValueAtIndex(outputs, 0);

      //Get the output type (will show airplay / hdmi etc
      CFStringRef outputType = CFDictionaryGetValue(currentOutput, kAudioSession_AudioRouteKey_Type);

      //If you're using Apple TV as your ouput - this will get the name of it (Apple TV Kitchen) etc
      CFStringRef outputName = CFDictionaryGetValue(currentOutput, @"RouteDetailedDescription_Name");

      self.deviceOutputType = (NSString *)outputType;
      self.airplayDeviceName = (NSString *)outputName;

      return (CFStringCompare(outputType, kAudioSessionOutputRoute_AirPlay, 0) == kCFCompareEqualTo);
    }
  }
  return NO;
}

Answer 3

我将发布与环境光类似的答案，以便快速。也许它对将来的某人有帮助。

private func addAirplayNotifier() {
    NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("airplayChanged:"), name: AVAudioSessionRouteChangeNotification, object: AVAudioSession.sharedInstance())
}

func airplayChanged(sender:NSNotification) -> Bool {
    var airplayConnected = false
    let currentRoute = AVAudioSession.sharedInstance().currentRoute
    for output in currentRoute.outputs {
        if output.portType == AVAudioSessionPortAirPlay {
            print("Airplay Device connected with name: \(output.portName)")
            airplayConnected = true
        }
    }
    print("Disconnect Airplay")
    return airplayConnected
}

斯威夫特 3.0

private func addAirplayNotifier() {
    NotificationCenter.default.addObserver(self, selector: Selector("airplayChanged:"), name:NSNotification.Name.AVAudioSessionRouteChange, object: AVAudioSession.sharedInstance())
}

Answer 4

斯威夫特 4

private func addAirplayNotifier() {
    NotificationCenter.default.addObserver(
        self,
        selector: #selector(airplayChanged),
        name: AVAudioSession.routeChangeNotification,
        object: AVAudioSession.sharedInstance())
}

@objc func airplayChanged() {
    isAirPlaying = false
    let currentRoute = AVAudioSession.sharedInstance().currentRoute
    for output in currentRoute.outputs where output.portType == AVAudioSession.Port.airPlay {
        print("Airplay Device connected with name: \(output.portName)")
        isAirPlaying = true
    }
}