Timeline Progress bar for AVPlayer

Please use the below code which is from apple example code "AVPlayerDemo".

    double interval = .1f;      CMTime playerDuration = [self playerItemDuration]; // return player duration.    if (CMTIME_IS_INVALID(playerDuration))     {        return;    }     double duration = CMTimeGetSeconds(playerDuration);    if (isfinite(duration))    {        CGFloat width = CGRectGetWidth([yourSlider bounds]);        interval = 0.5f * duration / width;    }    /* Update the scrubber during normal playback. */    timeObserver = [[player addPeriodicTimeObserverForInterval:CMTimeMakeWithSeconds(interval, NSEC_PER_SEC)                                                           queue:NULL                                                      usingBlock:                                                      ^(CMTime time)                                                       {                                                          [self syncScrubber];                                                      }] retain];- (CMTime)playerItemDuration{    AVPlayerItem *thePlayerItem = [player currentItem];    if (thePlayerItem.status == AVPlayerItemStatusReadyToPlay)    {                return([playerItem duration]);    }    return(kCMTimeInvalid);}

And in syncScrubber method update the UISlider or UIProgressBar value.

- (void)syncScrubber{    CMTime playerDuration = [self playerItemDuration];    if (CMTIME_IS_INVALID(playerDuration))     {        yourSlider.minimumValue = 0.0;        return;    }     double duration = CMTimeGetSeconds(playerDuration);    if (isfinite(duration) && (duration > 0))    {        float minValue = [ yourSlider minimumValue];        float maxValue = [ yourSlider maximumValue];        double time = CMTimeGetSeconds([player currentTime]);        [yourSlider setValue:(maxValue - minValue) * time / duration + minValue];    }} 

Thanks to iOSPawan for the code!I simplified the code to the necessary lines. This might be more clear to understand the concept. Basically I have implemented it like this and it works fine.

Before starting the video:

__weak NSObject *weakSelf = self;    [_player addPeriodicTimeObserverForInterval:CMTimeMakeWithSeconds(1.0 / 60.0, NSEC_PER_SEC)                                      queue:NULL                                 usingBlock:^(CMTime time){                                                [weakSelf updateProgressBar];                                             }];[_player play];

Then you need to have a method to update your progress bar:

- (void)updateProgressBar{    double duration = CMTimeGetSeconds(_playerItem.duration);    double time = CMTimeGetSeconds(_player.currentTime);    _progressView.progress = (CGFloat) (time / duration);}

    let progressView = UIProgressView(progressViewStyle: UIProgressViewStyle.Bar)    self.view.addSubview(progressView)    progressView.constrainHeight("\(1.0/UIScreen.mainScreen().scale)")    progressView.alignLeading("", trailing: "", toView: self.view)    progressView.alignBottomEdgeWithView(self.view, predicate: "")    player.addPeriodicTimeObserverForInterval(CMTimeMakeWithSeconds(1/30.0, Int32(NSEC_PER_SEC)), queue: nil) { time in        let duration = CMTimeGetSeconds(playerItem.duration)        progressView.progress = Float((CMTimeGetSeconds(time) / duration))    }