带Avplayer的Uislider

Question

Hi i created Avplayer for playing audio from server and its working perfectly but UISlider is not syncing with Audio even after updating UISlider method but the slider is moving properly but its not syncing with audio.i need to match that audio with UISlider

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;
    [self.view addSubview:seekbar];
-(void)Audio{
    NSString *urlString= @"https:/embed-ssl.wistia.com/deliveries/85dcf8de9db3830f47f136a4dba89114be58403f/dhwpxq4l9l.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];
    NSLog(@"Audio playing");
}

- (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:(UISlider*)sender {
   CGFloat currentSongTime = CMTimeGetSeconds([audioPlayer currentTime]);
    seekbar.value = currentSongTime;

    seekbar.minimumValue=0;
    seekbar.maximumValue=currentSongTime;
}

- (void)updateProgress {

    [seekbar setValue:CMTimeGetSeconds(audioPlayer.currentTime)];
}

Answer 1

Why are you changing the maximum value at every change? You can set the minimumValue and maximumValue when you get AVPlayerStatusReadyToPlay according to audioPlayer.currentItem.duration

So instead of the seektime you can just use:

    else if (audioPlayer.status == AVPlayerStatusReadyToPlay) {
                NSLog(@"AVPlayerStatusReadyToPlay");
                [audioPlayer play];
                seekbar.minimumValue = 0;
                seekbar.maximumValue = CMTimeGetSeconds(audioPlayer.currentItem.duration);

    }