Avplayer issues with UISlider - ios

Question

Hi i just created AVplayer for playing audio from server. My problem is my UISlider is not moving based on Audioplayer.please help me out to overcome this problem.
seekbar =[[UISlider alloc]init];
seekbar.frame=CGRectMake(10,CGRectGetMinY(PlayAudio.frame)-50, CGRectGetWidth(self.view.frame)-20, 20);
[seekbar addTarget:self action:#selector(seekTime:) forControlEvents:UIControlEventValueChanged];
seekbar.continuous=YES;
seekbar.minimumValue=0;
seekbar.maximumValue=20;
[self.view addSubview:seekbar];
-(void)Audio{
NSString *urlString= #"https.wav";
audioPlayer = [[AVPlayer alloc]initWithURL:[NSURL URLWithString:urlString]];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(playerItemDidReachEnd:)
name:AVPlayerItemDidPlayToEndTimeNotification
object:[audioPlayer currentItem]];
[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:#selector(updateProgress) userInfo:nil repeats:YES];
[audioPlayer play];
}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
if (object == audioPlayer && [keyPath isEqualToString:#"status"]) {
if (audioPlayer.status == AVPlayerStatusFailed) {
NSLog(#"AVPlayer Failed");
} else if (audioPlayer.status == AVPlayerStatusReadyToPlay) {
NSLog(#"AVPlayerStatusReadyToPlay");
[audioPlayer play];
} else if (audioPlayer.status == AVPlayerItemStatusUnknown) {
NSLog(#"AVPlayer Unknown");
}
}
}
- (void)seekTime:(id)sender {
[seekbar setValue:CMTimeGetSeconds(audioPlayer.currentTime)];
}

Answer 1

seekTime is only called when the user moves the slider. So that is not a good place for updating it.
You should have a updateProgress method, that is called from the NSTimer, that's where you need to update the slider position:
- (void)updateProgress {
[seekbar setValue:CMTimeGetSeconds(audioPlayer.currentTime)];
}
So everytime the NSTimer fires, it should update the position of the slider.
On the seekTime method you should do the opposite: set the audio playback to the point that the user selected. Something like this:
[audioPlayer setCurrentTime:seekbar.value];