Cannot load image to UIImageView from absolute path - objective-c

Question

I use UIImagePickerController to pick image and load to my UIImageView, but I want to save user pick and load it later, I think will be good save absolute path to user defaults but not working (
How I save path // all working
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo: (NSDictionary *)info
{
[self.backgroundImage setImage:info[UIImagePickerControllerOriginalImage]];
NSURL* localUrl = (NSURL *)[info valueForKey:UIImagePickerControllerReferenceURL];
//in localUrl I see: assets-library://asset/asset.JPG?id=B6C0A21C-07C3-493D-8B44-3BA4C9981C25&ext=JPG
NSUserDefaults *saves = [NSUserDefaults standardUserDefaults];
[saves setValue:[localUrl absoluteString] forKey:#"backimage"];
[saves synchronize];
[self dismissViewControllerAnimated:YES completion:nil];
}
How I try to load: //not working (
NSUserDefaults *saves = [NSUserDefaults standardUserDefaults];
if(![saves objectForKey:#"backimage"]){
[self.backgroundImage setImage:[UIImage imageNamed:#"gameBackiPhone"]];
}else{
NSURL *url = [NSURL URLWithString:[saves objectForKey:#"backimage"]];
//in url I see: assets-library://asset/asset.JPG?id=B6C0A21C-07C3-493D-8B44-3BA4C9981C25&ext=JPG
UIImage *bimage = [[UIImage alloc] initWithData:[NSData dataWithContentsOfURL:url]];
[self.backgroundImage setImage:bimage];
}
How must be I cannot find.

Answer 1

You can not load image directly using Asset URL, you need to use ALAssetsLibrary class to achieve it. Use following snippet to load image using Asset URL.
// *** It will return Asset from URL passed, create Image from Asset and set into your `UIImageView` ***
ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *myasset)
{
ALAssetRepresentation *rep = [myasset defaultRepresentation];
CGImageRef iref = [rep fullResolutionImage];
if (iref) {
UIImage *largeimage = [UIImage imageWithCGImage:iref];
yourImageView.image = largeImage;
}
};
// *** If any error occurs while getting image from Asset Library following block will be invoked ***
ALAssetsLibraryAccessFailureBlock failureblock = ^(NSError *myerror)
{
NSLog(#"Can't get image - %#",[myerror localizedDescription]);
};
// *** Set Asset URL to load Image (assets-library://asset/asset.JPG?id=B6C0A21C-07C3-493D-8B44-3BA4C9981C25&ext=JPG) ***
[NSURL *asseturl = [NSURL URLWithString:yourURL];
// *** Create ALAssetsLibrary Instance and load Image ***
ALAssetsLibrary* assetslibrary = [[[ALAssetsLibrary alloc] init] autorelease];
[assetslibrary assetForURL:asseturl
resultBlock:resultblock
failureBlock:failureblock];
Dont forget to import AssetsLibrary framework in your project.