将视频保存到照片库 - iPhone SDK

Question

有什么方法可以将文档目录中的视频保存到照片库中吗？我在文档目录中有视频的链接，我只是不知道如何将其保存到照片应用程序。

谢谢，

凯文

Answer 1

如果您先将其保存在本地目录中，则可以将其另存为..

    ALAssetsLibrary *assetLibrary = [[ALAssetsLibrary alloc] init];
    [assetLibrary writeVideoAtPathToSavedPhotosAlbum:url completionBlock:^(NSURL *assetURL, NSError *error){
        if(error) {
           NSLog(@"error while saving to camera roll %@",[error localizedDescription]);        
        } else {
            //For removing the back up copy from the documents directory           
            NSError *removeError = nil;
            [[NSFileManager defaultManager] removeItemAtURL:url error:&removeError];
            NSLog(@"%@",[removeError localizedDescription]);
        }
    }];

Answer 2

使用 UISaveVideoAtPathToSavedPhotosAlbum 函数。

Answer 3

试试这个

您还可以使用此代码从互联网下载视频并将其保存到照片中。

NSURL *videoUrl = [NSURL URLWithString:[NSString stringWithFormat:@"Your Video Url or Path"]];

dispatch_queue_t q = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0ul);
dispatch_async(q, ^{

    NSData *videoData = [NSData dataWithContentsOfURL:videoUrl];

    dispatch_async(dispatch_get_main_queue(), ^{

        // Write it to cache directory
        NSString *videoPath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingPathComponent:@"file.mov"];
       [videoData writeToFile:videoPath atomically:YES];

       // After that use this path to save it to PhotoLibrary
       ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
       [library writeVideoAtPathToSavedPhotosAlbum:[NSURL fileURLWithPath:videoPath] completionBlock:^(NSURL *assetURL, NSError *error)
        {
            if (error)
            {
                NSLog("Error");
            }
            else
            {
                NSLog("Success");
            }

        }];
    });
});