iphone - 在 iphone 的缩略图中显示视频时长

Question

在我的应用程序中，我录制了视频并在 iPhone 中显示了缩略图。一切正常。

但是我的缩略图不显示视频时长。

我从以下链接获得代码:

ThumbNail Image

//my code

NSURL *videoURL = [NSURL fileURLWithPath:url];

MPMoviePlayerController *player = [[MPMoviePlayerController alloc] initWithContentURL:videoURL];

        UIImage *thumbnail = [player thumbnailImageAtTime:1.0 timeOption:MPMovieTimeOptionNearestKeyFrame];

我该如何解决这个问题？

Answer 1

   NSURL *videoURL = [NSURL fileURLWithPath:url];

   MPMoviePlayerController *player = [[MPMoviePlayerController alloc] initWithContentURL:videoURL];

   UIImage *thumbnail = [player thumbnailImageAtTime:1.0 timeOption:MPMovieTimeOptionNearestKeyFrame];

   [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(showDuration:) name:MPMovieDurationAvailableNotification object:player];


-(void)showDuration:(NSNotification*)notif
 {
MPMoviePlayerController *player = (MPMoviePlayerController*)[notif object];
NSLog(@"content play length is %g seconds", player.duration);
  }