Question

I have VideoController which plays video. Now VideoController is pushed in navigationController.

 VideoController *ObjVideoController = [[VideoController alloc] init];
 ObjVideoController.strVideoURL = [AnimationArr objectAtIndex:SequenceCount];
 [self.navigationController pushViewController:ObjVideoController animated:NO];
 [ObjVideoController play:[AnimationArr objectAtIndex:SequenceCount]];

Play method in VideoController is like this:

 - (void)play:(NSString*)videoFile {
    playbaktime = 0.0;

    NSBundle *main = [NSBundle mainBundle];
    NSURL *url = [NSURL fileURLWithPath:[[main resourcePath] stringByAppendingPathComponent:videoFile]];

    if (!self.ctl)
    {
        self.ctl = nil;
        self.ctl = [[MPMoviePlayerController alloc]init];
        [self.view addSubview:self.ctl.view];
    }
    [self.ctl prepareToPlay];
    self.ctl.contentURL = url;
    self.ctl.controlStyle = 0;
    //self.ctl.useApplicationAudioSession = NO;
    [self.ctl.view setUserInteractionEnabled:NO];
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
        [self.ctl.view setFrame:CGRectMake(0,0,480,320)];
    else
        [self.ctl.view setFrame:CGRectMake(0,0,1024,768)];

    self.ctl.backgroundView.backgroundColor = [UIColor whiteColor];
    [self.ctl play];
}

Now observer has been add for UIApplicationWillResignActive, UIApplicationDidBecomeActive. Its selector are given below:

 -(void)Pause_Video:(NSNotification*)notification {
   Pausevideo = 1;
   playbaktime = self.ctl.currentPlaybackTime;
   [self.ctl pause];
 }

-(void)Play_Video:(NSNotification*)notification {

  if(self.ctl.loadState == MPMovieLoadStateUnknown)
  {
    [self play:self.strVideoURL];
    Pausevideo = 0;
  }
  else{
    if (self.ctl.playbackState == MPMoviePlaybackStatePaused) {
        [self.ctl play];
        Pausevideo = 0;
    } 
    else
    {
        [self.ctl setInitialPlaybackTime:playbaktime];
        [self.ctl play];
        Pausevideo = 0;
    }
   }  
  }

Hope u understood question and help will be appreciated.

Answer 1

You seem to be calling prepareToPlay every time before playing, this is not necessary, just call it once when you load the file. There is no need to call it after you pause.

Additionally, you are incurring a lag because notifications do not fire instantly. Specifically, UIApplicationDidBecomeActive only fires well after the app has entered the foreground. What you want instead is to observe the UIApplicationWillEnterForegroundNotification, which will fire as the app is entering the foreground, and allow you to decrease the lag significantly.