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POIs there a way to access the currently played track while the iPhone is connected to an accessory?
 

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  1. POIs there a way to access the currently played track while the iPhone is connected to an accessory?
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    <p>I am trying to receive information about the currently played track in a iOS app. This works pretty fine while the iPhone is <em>not</em> connected to an accessory. If I connect it to my car (Opel Astra, iPhone jack), the following code stops to work <a href="https://developer.apple.com/library/ios/#documentation/mediaplayer/reference/MPMusicPlayerController_ClassReference/Reference/Reference.html" rel="noreferrer">as described in the documentation</a>:</p> <blockquote> <p>If you create an iPod music player and the user plays an item from another library using Home Sharing, the value of this property is <code>nil</code>.</p> </blockquote> <p>Code:</p> <pre><code>// nil while connected to an accessory MPMediaItem *nowPlayingMediaItem = [[MPMusicPlayerController iPodMusicPlayer] nowPlayingItem]; // Works while not connected to an accessory NSString *title = [nowPlayingMediaItem valueForProperty:MPMediaItemPropertyTitle]; </code></pre> <p>I even tried "hacky" stuff like to access "private" properties (<a href="http://www.pixiapps.com/blog/?p=78" rel="noreferrer">original code</a>):</p> <pre><code>MPMediaQuery *query=nil; MPMediaItemCollection *collection=nil; id internalPlayer=nil; Ivar internalPlayeriVar = object_getInstanceVariable(iPod, "_internal", NULL); internalPlayer = object_getIvar(iPod, internalPlayeriVar); NSLog(@"internalPlayer: %@", internalPlayer); Ivar queryIvar = object_getInstanceVariable(internalPlayer, "_query", NULL); query = object_getIvar(internalPlayer, queryIvar); // nil everytime Ivar collectionIvar = object_getInstanceVariable(internalPlayer, "_itemCollection", NULL); collection = object_getIvar(internalPlayer, collectionIvar); // nil everytime </code></pre> <p>or to call private methods:</p> <pre><code>// Same behaviour like [iPod nowPlayingItem], works // only while no accessory is connected MPMediaItem *nowPlayingMediaItem = [iPod nowPlayingItemAtIndex:[iPod indexOfNowPlayingItem]]; // Works while not connected to an accessory NSString *title = [nowPlayingMediaItem valueForProperty:MPMediaItemPropertyTitle]; </code></pre> <p>Its also <em>no</em> solution to access the new <code>MPNowPlayingInfoCenter</code>, its <code>nil</code> all the time.</p> <pre><code>[MPNowPlayingInfoCenter defaultCenter].nowPlayingInfo </code></pre> <p>My car plays my music directly without using a iPhone app <em>and</em> it seems my iPhone knows what the car is currently playing because it displays the title, artist and cover icon on the lock screen (and only there). Also the internal play count gets increased.</p> <p>If I check the playback state, it returns also <code>YES</code> if the car plays music:</p> <pre><code>[[MPMusicPlayerController iPodMusicPlayer] playbackState] == MPMusicPlaybackStatePlaying </code></pre> <p>So, is there any way (may be through calling private methods) to access the song, the car is currently playing?</p>
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    1. USThomas Kekeisen
    1. USThomas Kekeisen
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    1. COOT: I had to smile when I read that you see your car as an accessory to your phone and not the other way round :-)
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      1. POIs there a way to access the currently played track while the iPhone is connected to an accessory?
      1. USMatthias
    2. COCan you explain if you are connecting via the headphone jack or the iPhone jack? I am also assuming that your car is playing music from your iPhone? If the iPhone is displaying the song then I assume that the iPhone is actually the one playing the music instead of the car. Are you wanting to play the music through your app while it is connected to the car so it comes out the car speakers?
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      1. POIs there a way to access the currently played track while the iPhone is connected to an accessory?
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    3. COI connect the iPhone via the iPhone jack. I don't know who is acutually playing the music, but I am able to select the music from the info display in my car. I just want to know in a third party app what song is currently played. (To play music with a third party app is also possible, but the car audio controls only work with the real "music" app)
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      1. USThomas Kekeisen
 

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