需要将.MP4文件从Documents文件夹保存到Photo Gallery中，但资产网址返回nil

Question

I have download the .mp4 file from sever to document directory and called the writeVideoAtPathToSavedPhotosAlbum method to save to gallery but its nor working.its throwing asset url nil.Can anyone plz help me with this issue

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *path = [documentsDirectory stringByAppendingPathComponent:@"test.mp4"];
    NSURL *movieURL = [NSURL fileURLWithPath:path];
    ALAssetsLibrary* library = [[ALAssetsLibrary alloc] init];
    NSLog(@"Moview URL:%@",movieURL);
    NSURL *url = [movieURL copy];

    [library writeVideoAtPathToSavedPhotosAlbum:url
                                completionBlock:^(NSURL *assetURL, NSError *error)
    {
        NSLog(@"Asset Url:%@",assetURL);
        if(!error) {
            NSLog(@"\t ! Error");
            NSLog(@"\t Error: %@", [error localizedDescription]);
            NSLog(@"\t Error code %d", [error code]);
        }

        if(error != nil) {
            NSLog(@"\t ERROR != NIL");
            NSLog(@"\t Error - Image Failed To Save With Error: %@", [error localizedDescription]);
            NSLog(@"\t Error code %d", [error code]);
        }

        if(error == nil) {
            NSLog(@"\t ERROR == NIL");
        }
    }];

Answer 1

Check this below methods:

  -(void)ButtonAction:(id)sender
    {
        NSURL *video = [NSURL URLWithString:YOURURL];
        NSData *data = [NSData  dataWithContentsOfURL:video];
        NSString *docDirPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
        NSString *filePath = [NSString stringWithFormat:@"%@/myvideo_%@.mp4",docDirPath,CURRENT_TIMESTAMP];
        [data writeToFile:filePath atomically:YES];

        NSURL *urlPath  = [[NSURL alloc] initFileURLWithPath:filePath];
        [self saveToCameraRoll:urlPath dict:(NSDictionary *)sender];
    }

    -(void) saveToCameraRoll:(NSURL *)srcURL dict:(NSDictionary *)dictValues
    {
        NSLog(@"srcURL: %@", srcURL);

        ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
        [library writeVideoAtPathToSavedPhotosAlbum:srcURL completionBlock:^(NSURL *assetURL, NSError *error)
         {
             NSURL *savedAssetURL = assetURL;

             NSLog(@"asset url %@",assetURL);
             if(error)
             {
                error handling
             }
             else
             {
                 [library assetForURL:savedAssetURL resultBlock:^(ALAsset * alAsset)
                  {
                             NSLog(@"Saved");


                  }failureBlock:^(NSError *error)
                  {
                               NSLog(@"Not Saved");


                  }];
             }
         }];
    }

Answer 2

在completionBlock中尝试assetURL.absoluteString