获取视频停止播放时已经播放的时间

  MPMoviePlayerViewController *mPlayer = [[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL URLWithString:self.itemVideoUrl]];
            [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playbackDidFinish:) name:MPMoviePlayerPlaybackDidFinishNotification object:mPlayer.moviePlayer];
            [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playbackStateDidChange:) name:MPMoviePlayerPlaybackStateDidChangeNotification object:mPlayer.moviePlayer];



#pragma mark - 视频停止播放的通知,用来获取视频停止播放时已经播放的时间
- (void)playbackDidFinish:(NSNotification *)aNote
{
    MPMoviePlayerController *moviePlayer = [aNote object];
    NSDictionary *userInfo = [aNote userInfo];
    int reason = [[userInfo objectForKey:@"MPMoviePlayerPlaybackDidFinishReasonUserInfoKey"] intValue];
    switch (reason) {
        case MPMovieFinishReasonPlaybackEnded:
            break;
        case MPMovieFinishReasonPlaybackError:
            break;
        case MPMovieFinishReasonUserExited:
            break;
        default:
            break;
    }
    
    
    CGFloat playtime = [moviePlayer currentPlaybackTime];
    NSLog(@"%f", playtime);
    [[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayer];
}
- (void)playbackStateDidChange:(NSNotification *)aNote
{
    MPMoviePlayerController *moviePlayer = [aNote object];
    switch (moviePlayer.playbackState) {
        case MPMoviePlaybackStateStopped:
            NSLog(@"self.moviePlayer Stopped");
            break;
        case MPMoviePlaybackStatePlaying:
//设置开始播放视频时的时间
            moviePlayer.currentPlaybackTime = 300.07;
            NSLog(@"self.moviePlayer Playing");
            break;
        case MPMoviePlaybackStatePaused:
            NSLog(@"self.moviePlayer Paused");
            break;
        case MPMoviePlaybackStateInterrupted:
            NSLog(@"self.moviePlayer Interrupted");
            break;
        case MPMoviePlaybackStateSeekingForward:
            NSLog(@"self.moviePlayer Forward");
            break;
        case MPMoviePlaybackStateSeekingBackward:
            NSLog(@"self.moviePlayer Backward");
            break;
        default:
            break;
    }
    
    CGFloat playtime = [moviePlayer currentPlaybackTime];
    NSLog(@"%f", playtime);
}