Replaying AVPlayerItem / AVPlayer without re-downloading

Question

I have an AVPlayer class all set up that streams an audio file. It's a bit long, so I can't post the whole thing here. What I am stuck on is how to allow the user to replay the audio file after they have finished listening to it once. When it finishes the first time, I correctly receive a notification AVPlayerItemDidPlayToEndTimeNotification. When I go to replay it, I immediately receive the same notification, which blocks me from replaying it.

How can I reset this such that the AVPlayerItem doesn't think that it has already played the audio file? I could deallocate everything and set it up again, but I believe that would force the user to download the audio file again, which is pointless and slow.

Here are some parts of the class that I think are relevant. The output that I get when attempting to replay the file looks like this. The first two lines are exactly what I would expect, but the third is a surprise.

is playing
no timer
audio player has finished playing audio

- (id) initWithURL : (NSString *) urlString
{
    self = [super init];
    if (self) {
        self.isPlaying = NO;
        self.verbose = YES;

        if (self.verbose) NSLog(@"url: %@", urlString);
        NSURL *url = [NSURL URLWithString:urlString];

        self.playerItem = [AVPlayerItem playerItemWithURL:url];
        self.player = [[AVPlayer alloc] initWithPlayerItem:self.playerItem];

        [self determineAudioPlayTime : self.playerItem];

        self.lengthOfAudioInSeconds = @0.0f;

        [self.player addObserver:self forKeyPath:@"status" options:0 context:nil];

        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(itemDidFinishPlaying:) name:AVPlayerItemDidPlayToEndTimeNotification object:self.playerItem];
    }

    return self;
}

// this is what gets called when the user clicks the play button after they have 
// listened to the file and the AVPlayerItemDidPlayToEndTimeNotification has been received
- (void) playAgain {
    [self.playerItem seekToTime:kCMTimeZero];
    [self toggleState];
}

- (void) toggleState {
    self.isPlaying = !self.isPlaying;

    if (self.isPlaying) {
        if (self.verbose) NSLog(@"is playing");
        [self.player play];

        if (!timer) {
            NSLog(@"no timer");
            CMTime audioTimer = CMTimeMake(0, 1);
            [self.player seekToTime:audioTimer];

            timer = [NSTimer scheduledTimerWithTimeInterval:1.0
                                                     target:self
                                                   selector:@selector(updateProgress)
                                                   userInfo:nil
                                                    repeats:YES];
        }

    } else {
        if (self.verbose) NSLog(@"paused");
        [self.player pause];
    }
}

-(void)itemDidFinishPlaying:(NSNotification *) notification {
    if (self.verbose) NSLog(@"audio player has finished playing audio");
    [[NSNotificationCenter defaultCenter] postNotificationName:@"audioFinished" object:self];
    [timer invalidate];
    timer = nil;
    self.totalSecondsPlayed = [NSNumber numberWithInt:0];
    self.isPlaying = NO;
}

Answer 1

You can call the seekToTime method when your player received AVPlayerItemDidPlayToEndTimeNotification

func itemDidFinishPlaying() {
    self.player.seek(to: CMTime.zero)
    self.player.play()
}