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copied!<p>To get notification for reaching the end of an item (via <a href="http://developer.apple.com/library/ios/#documentation/AudioVideo/Conceptual/AVFoundationPG/Articles/02_Playback.html#//apple_ref/doc/uid/TP40010188-CH3-SW7" rel="noreferrer">Apple</a>):</p> <pre><code>[[NSNotificationCenter defaultCenter] addObserver:<self> selector:@selector(<#The selector name#>) name:AVPlayerItemDidPlayToEndTimeNotification object:<#A player item#>]; </code></pre> <p>And to track playing you can:</p> <p>"track changes in the position of the playhead in an AVPlayer object" by using <strong>addPeriodicTimeObserverForInterval:queue:usingBlock:</strong> or <strong>addBoundaryTimeObserverForTimes:queue:usingBlock:</strong>. </p> <p>Example is from Apple:</p> <pre><code>// Assume a property: @property (retain) id playerObserver; Float64 durationSeconds = CMTimeGetSeconds([<#An asset#> duration]); CMTime firstThird = CMTimeMakeWithSeconds(durationSeconds/3.0, 1); CMTime secondThird = CMTimeMakeWithSeconds(durationSeconds*2.0/3.0, 1); NSArray *times = [NSArray arrayWithObjects:[NSValue valueWithCMTime:firstThird], [NSValue valueWithCMTime:secondThird], nil]; self.playerObserver = [<#A player#> addBoundaryTimeObserverForTimes:times queue:NULL usingBlock:^{ // Passing NULL for the queue specifies the main queue. NSString *timeDescription = (NSString *)CMTimeCopyDescription(NULL, [self.player currentTime]); NSLog(@"Passed a boundary at %@", timeDescription); [timeDescription release]; }]; </code></pre>

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