HysteriaPlayerDelegate protocl

PlayerViewController.m

- (void)hysteriaPlayerCurrentItemChanged:(AVPlayerItem *)item
{
    [self updateCurrentItem];
}

- (void)hysteriaPlayerRateChanged:(BOOL)isPlaying
{
    [self updateInterfaceState:isPlaying];
}

- (void)updateCurrentItem
{
    Song *currentItem = [[PlayingItems sharedInstance] getCurrentSong];
    [[SDWebImageManager sharedManager] downloadWithURL:[NSURL URLWithString:currentItem.artworkURL] options:0 progress:nil completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, BOOL finished) {
        [self.spinningDiskView setImage:image];
    }];
    
    self.navigationItem.title = currentItem.title;
}

- (void)updateInterfaceState:(BOOL)isPlaying
{
    [playButton setSelected:isPlaying];
    [self.spinningDiskView setRotaion:isPlaying];
}