iOS判断从系统相册选取的是视频还是照片

第一种方法：并可以获取到视频的缩略图，原文地址：http://blog.csdn.net/xiaobo16/article/details/7759181

 

 

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   - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
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   {
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   [picker dismissModalViewControllerAnimated:YES];
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   NSString *mediaType = [infoobjectForKey:UIImagePickerControllerMediaType];
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   if([mediaType isEqualToString:@"public.movie"])
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   {
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   NSURL *videoURL = [infoobjectForKey:UIImagePickerControllerMediaURL];
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   NSLog(@"found a video");
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    //获取视频的thumbnail
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    MPMoviePlayerController *player = [[[MPMoviePlayerControlleralloc]initWithContentURL:videoURL] autorelease];
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    UIImage *thumbnail = [playerthumbnailImageAtTime:1.0timeOption:MPMovieTimeOptionNearestKeyFrame];
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    player = nil;
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    }
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    }

第二种方法，通过判断是否含有视频轨道，参考地址：http://www.thinksaas.cn/ask/question/22483/

 

1.  
   - (void)imagePickerController: (UIImagePickerController *)picker didFinishPickingMediaWithInfo: (NSDictionary *)info{
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   NSURL *videoURL = [info objectForKey:UIImagePickerControllerMediaURL];
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   AVAsset *asset = [AVURLAsset URLAssetWithURL:videoURL options:info];
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   NSArray *tracks = [asset tracksWithMediaType:AVMediaTypeVideo];
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   //判断是否含有视频轨道
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   BOOL hasVideoTrack = [tracks count] > 0;
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   if (hasVideoTrack) {
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   [picker dismissViewControllerAnimated:YES completion:^{
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    }];
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    return;
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    }
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    }