I want to get current video playing time, not total duration.

My code is 

```
[[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(MPMoviePlayerLoadStateDidChange:)
                                                 name:MPMoviePlayerLoadStateDidChangeNotification
                                               object:nil];

- (void)MPMoviePlayerLoadStateDidChange:(NSNotification *)notification {
    if ((self.moviePlayer.loadState & MPMovieLoadStatePlaythroughOK) == MPMovieLoadStatePlaythroughOK) {
        NSLog(@"content play length is %g seconds", self.moviePlayer.duration);
//        self.lblVideoDuration.text = [NSString stringWithFormat:@"%@", self.moviePlayer.duration];
    }
}

```

but above will give me total duration, but i don't want total duration.

if my Video duration is 1 minute and currently it play around 30 seconds, i want that live playback timing.

how can i get that?

I am able get Video Playback timing by start timer like this.

```
- (void)MPMoviePlayerLoadStateDidChange:(NSNotification *)notification {
    if (self.moviePlayer.playbackState == MPMoviePlaybackStatePlaying) {
        [self.activityIndicator stopAnimating];
        [self.activityIndicator removeFromSuperview];
        [self startDurationTimer];
    }
}

- (void)startDurationTimer {
    self.durationTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(monitorMoviePlayback) userInfo:nil repeats:YES];
}

- (void)stopDurationTimer {
    dispatch_async(dispatch_get_main_queue(), ^{
        [self.durationTimer invalidate];
        self.durationTimer = nil;
    });
}

- (void)monitorMoviePlayback {
    double currentTime = floor(self.moviePlayer.currentPlaybackTime);
    double totalTime = floor(self.moviePlayer.duration);
    double minutesElapsed = floor(currentTime / 60.0);
    double secondsElapsed = fmod(currentTime, 60.0);

    NSLog(@"Minute = %f && Second = %f", minutesElapsed, secondsElapsed);
    }
}

```

but when i call stoptimer method , Timer is not invalidating or not stopped.

how can i invalidate Timer?