Obtain ReferenceURL after saving an image using UIImageWriteToSavedPhotosAlbum()

Question

I want to obtain the referenceURL to the image that I saved into camera roll using UIImageWriteToSavedPhotosAlbum(). iOS 4.1 or above can do it easily by using AssetLibrary.

ALAssetsLibraryWriteImageCompletionBlock completionBlock = ^(NSURL* url, NSError* error) {
    if (error == nil) {
        savedURL = url;
    }
};    
UIImage * originalImage = [info objectForKey:UIImagePickerControllerOriginalImage];
NSMutableDictionary * metadata = (NSMutableDictionary *)[info objectForKey:UIImagePickerControllerMediaMetadata];  
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library writeImageToSavedPhotosAlbum:originalImage.CGImage
                             metadata:metadata
                      completionBlock:completionBlock];

But, I cannot figure out a smart way in case of earlier iOS where the only way of saving an image to the camera library is UIImageWriteToSavedPhotosAlbum(). One way I think about is looking around the saved image using ALAssetsGroup etc. This is not smart for me, and it only helps iOS 4.0.

Thank you in advance,

Kiyo

Answer 1

Use writeImageToSavedPhotosAlbum instead:

[library writeImageToSavedPhotosAlbum:[originalImage CGImage] orientation:(ALAssetOrientation)[originalImage imageOrientation] completionBlock:^(NSURL *assetURL, NSError *error){  
    if (error) {  
        NSLog(@"error");  // oops, error !
    } else {  
        NSLog(@"url %@", assetURL);  // assetURL is the url you looking for 
    }  
}];