Question

嗨，我对ios非常新，我已经阅读了初学者书籍和中级书籍，我理解ios，有些事我无法完成。即时尝试将.mov视频的缩略图放入像youtube应用程序这样的单元格中，我想出如何将缩略图放入UIImageView

NSString *videoPath = [[NSBundle mainBundle] pathForResource:@"e.mov" ofType:nil];
NSURL *videoURl = [[NSURL alloc ] initFileURLWithPath:videoPath];
AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:videoURl options:nil];
AVAssetImageGenerator *generate = [[AVAssetImageGenerator alloc] initWithAsset:asset];
generate.appliesPreferredTrackTransform = YES;
NSError *err = NULL;
CMTime time = CMTimeMake(0.0, 600);
CMTime actualTime;

CGImageRef imgRef = [generate copyCGImageAtTime:time actualTime:&actualTime error:&err];

UIImage *img = [[UIImage alloc] initWithCGImage:imgRef];
[self.myImageView setImage:img];

这就是我在标准UIViewController上将缩略图映射到UIImageView所做的，我只是想弄清楚如何在UITableViewCell *单元格中进行操作;

我有18个视频我希望以缩略图的形式显示在单元格中，一旦触摸到单元格，就会激活方法：方法被激活然后进入detailViewCOntroller

NSString *videoPath = [[NSBundle mainBundle] pathForResource:@"e.mov" ofType:nil];

如何将其设为NSMutableArray并将其放入

NSURL *videoURl = [[NSURL alloc ] initFileURLWithPath:videoPath];

并使其在单元格中工作

基本上我无法弄清楚如何在单元格中以缩略图的形式显示视频数组请帮忙

Answer 1

试试这个：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
   static NSString *CellIdentifier = @"Cell";
   UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier   forIndexPath:indexPath] ;

   AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:videoPath options:nil];
   AVAssetImageGenerator *generate = [[AVAssetImageGenerator alloc] initWithAsset:asset];
   CMTime time = CMTimeMake(1, 30);
   CGImageRef thumbImg = [generate copyCGImageAtTime:time actualTime:NULL error:&err];


   if (cell == nil)
   {
     cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
   }
   cell.imageView.contentMode = UIViewContentModeScaleAspectFit;
   cell.imageView.image = [UIImage imageWithCGImage:thumbImg];
   return cell;
}

Answer 2

这是...... get screenshot first frame of the video

- (UIImage*)loadImage {

    AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:vidURL options:nil];
    AVAssetImageGenerator *generate = [[AVAssetImageGenerator alloc] initWithAsset:asset];
    NSError *err = NULL;
    CMTime time = CMTimeMake(1, 60);
    CGImageRef imgRef = [generate copyCGImageAtTime:time actualTime:NULL error:&err];
    NSLog(@"err==%@, imageRef==%@", err, imgRef);

    return [[UIImage alloc] initWithCGImage:imgRef];

}

如何在IOS中为UITableView单元显示.mov的缩略图

2 个答案: