Save photo to iPhone Photo album from dowloaded NSData object

I download the data from a URL of video in NSData form. Now how can I store it to iphone Photoalbum? Is there any way to convert NSData to video back or we can directly save开发者_JAVA百科 it to photo album?

If you can play the movie in a MPMoviePlayerController object then it should return true when checked by UIVideoAtPathIsCompatibleWithSavedPhotosAlbum().

If so, then you can save it to the Photo Library using this function:

void UISaveVideoAtPathToSavedPhotosAlbum (
   NSString  *videoPath,
   id        completionTarget,
   SEL       completionSelector,
   void      *contextInfo
);

Alternatively, you can create and ALAssetsLibrary object and save it using using the this method:

- (void)writeVideoAtPathToSavedPhotosAlbum:(NSURL *)videoPathURL completionBlock:(ALAssetsLibraryWriteVideoCompletionBlock)completionBlock