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    copied!<p>I'm trying to create a new Objective-C class in Xcode and am getting a couple of the above errors in the .m file.</p> <pre><code>#import "Query.h" @implementation Query { MPMediaQuery *query = [[MPMediaQuery alloc] init]; //create new query [[query addFilterPredicate: [MPMediaPropertyPredicate predicateWithValue: @"Vampire Weekend" forProperty: MPMediaItemPropertyArtist]]; //filter out artists except for Vampire Weekend // Sets the grouping type for the media query [query setGroupingType: MPMediaGroupingAlbum]; //sort by album NSArray *albums = [query collections]; for (MPMediaItemCollection *album in albums) { MPMediaItem *representativeItem = [album representativeItem]; NSString *artistName = [representativeItem valueForProperty: MPMediaItemPropertyArtist]; NSString *albumName = [representativeItem valueForProperty: MPMediaItemPropertyAlbumTitle]; NSLog (@"%@ by %@", albumName, artistName); NSArray *songs = [album items]; for (MPMediaItem *song in songs) { NSString *playCount = [song valueForProperty:MPMediaItemPropertyPlayCount]; NSString *lastPlayed = [song valueForProperty:MPMediaItemPropertyLastPlayedDate]; NSString *songTitle = [song valueForProperty: MPMediaItemPropertyTitle]; //NSString *info = [[NSString alloc] initWithFormat: @"%@ has been played %@ times.\n Last played %@.", songTitle, playCount, lastPlayed]; NSLog(@"\n%@ has been played %@ times.\n Last played %@.", songTitle, playCount, lastPlayed); } } // Override point for customization after application launch. [query release]; } @end </code></pre> <p>Xcode freaks out and gives errors at line that I define an object, or try to use query (since it is undefined).</p> <p>My header file is as follows (not complete, but I stopped to deal with this):</p> <pre><code>#import &lt;Foundation/Foundation.h&gt; #import &lt;MediaPlayer/MediaPlayer.h&gt; @interface Query : NSObject { MPMediaQuery *query; } @property (nonatomic, retain) MPMediaQuery *query; @end </code></pre>
 

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