IOS如何创建视频缩略图片

    UIImage *myThumbNail = [[UIImage alloc] initWithData:pngImage];

    UIGraphicsBeginImageContext(CGSizeMake(60.0, 60.0));

    [myThumbNail drawInRect:CGRectMake(0.0, 0.0, 60.0, 60.0)];

    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    UIImageView *thumbView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0, 0.0, 60.0, 60.0)];

    thumbView.image = newImage;

    [self.view addSubview:thumbView];

    NSData *thumbData = UIImagePNGRepresentation(newImage);

        if ([thumbData writeToFile:[NSString stringWithFormat:@"%@/tempImageThumb.png"] atomically:YES]) {

            NSLog(@"thumb written!");

        }

    }

视频图片可以从视频中截取

_moviePlayer = [[MPMoviePlayerController alloc]initWithContentURL:movieUrl];

    UIImage *thumbnail = [_moviePlayerthumbnailImageAtTime:1.0 timeOption:MPMovieTimeOptionNearestKeyFrame