Monitor downloaded bytes when streaming via AvPlayerItem and AvPlayer - iOS - ios

Question

I want to monitor downloaded bytes when streaming mp3 from an URL and print it out to an IULabel. I can't find any easy method to do that.
What about "AVPlayerItemAccessLog", does it have the information? I can't figure out how to use that? Does anybody know how to get such information?
Below is my code for play the stream:
-(void)play
{
/*Allow radio to run in background*/
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
[[AVAudioSession sharedInstance] setActive: YES error: nil];
/*Gets the url fra sender*/
NSString *urlString= self.radioStation.url;
NSURL *url = [NSURL URLWithString:urlString];
/*Stop the radio if its play or have info*/
if(self.avPlayerItem)
{
[self stop];
}
/*Sets the Avplayeritem*/
self.avPlayerItem = [AVPlayerItem playerItemWithURL:url];
/*Listen for changes in the avPlayerItem*/
[self.avPlayerItem addObserver:self forKeyPath:#"status" options:0 context:nil];
/*Sets the avplayer with avplayeritem*/
self.avPlayer = [AVPlayer playerWithPlayerItem:self.avPlayerItem];
/*Sends loading info to the nortification*/
[[NSNotificationCenter defaultCenter] postNotificationName:#"Loading" object:self];
/*Plays the radio*/
[self.avPlayer play];
}

Answer 1

You need to use KVO on the AVPlayerItem to get this information. Something like this:
[self.player.currentItem addObserver:self
forKeyPath:#"loadedTimeRanges"
options:NSKeyValueObservingOptionNew
context:NULL];
And then the standard observer method:
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
// Get the player item's loadedTimeRanges value here.
}
Don't forget to remove the observers before releasing the player item.