image getting saved in simulator gallery but not in iphone gallery - iphone

Question

Trying to save the image in iphone gallery with following code below, but working fine in simulator, not in iphone.
-(void)saveTkt
{
UIWindow *keyWindow = [[UIApplication sharedApplication] keyWindow];
CGRect rect = [keyWindow bounds];
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
[keyWindow.layer renderInContext:context];
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
NSData * data = UIImagePNGRepresentation(img);
[data writeToFile:#"f.png" atomically:YES];
UIImageWriteToSavedPhotosAlbum(img, self, #selector(thisImage:hasBeenSavedInPhotoAlbumWithError:usingContextInfo:), nil);
}
edited code
-(void)saveTkt
{
UIWindow *keyWindow = [[UIApplication sharedApplication] keyWindow];
CGRect rect = [keyWindow bounds];
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
[keyWindow.layer renderInContext:context];
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
NSData * data = UIImagePNGRepresentation(img);
[data writeToFile:#"f.png" atomically:YES];
ALAuthorizationStatus status = [ALAssetsLibrary authorizationStatus];
if (status != ALAuthorizationStatusAuthorized) {
//show alert for asking the user to give permission
}
//UIImageWriteToSavedPhotosAlbum(img, self, #selector(thisImage:hasBeenSavedInPhotoAlbumWithError:usingContextInfo:), nil);
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library writeImageToSavedPhotosAlbum:[img CGImage] orientation:(ALAssetOrientation)[img imageOrientation] completionBlock:^(NSURL *assetURL, NSError *error){
if (error) {
// TODO: error handling
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:#"error" message:[error localizedDescription] delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
} else {
// TODO: success handling
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:#"alert" message:#"Saved suceesfully in photos album." delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
}
}];
ALAssetsLibraryGroupsEnumerationResultsBlock assetGroupEnumerator =
^(ALAssetsGroup *assetGroup, BOOL *stop) {
if (assetGroup != nil) {
// do somthing
}
};
ALAssetsLibraryAccessFailureBlock assetFailureBlock = ^(NSError *error) {
NSLog(#"Error enumerating photos: %#",[error description]);
};
NSUInteger groupTypes = ALAssetsGroupAll;
[library enumerateGroupsWithTypes:groupTypes usingBlock:assetGroupEnumerator failureBlock:assetFailureBlock];
}

Answer 1

Add Framework assetsLibrary
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library writeImageToSavedPhotosAlbum:[image CGImage] orientation:(ALAssetOrientation)[image imageOrientation] completionBlock:^(NSURL *assetURL, NSError *error){
if (error) {
// TODO: error handling
} else {
// TODO: success handling
}
}];
[library release];

Answer 2

Apple's documentation say that the completion handler must conform to this:
- (void) image: (UIImage *) image didFinishSavingWithError: (NSError *) error contextInfo: (void *) contextInfo;
And there's an error parameter passed along, which you should print out to see what the actual true error is.
For example:
- (void) image: (UIImage *) image didFinishSavingWithError: (NSError *) error contextInfo: (void *) contextInfo
{
if(error != NULL)
{
NSLog( #"error while saving image is %#", [error localizedDescription]);
}
}

Answer 3

I think you should try with NSData first if you need It, or you can simply do that without NSData
NSData *dataImage = UIImageJPEGRepresentation(file,1);
UIImageView *img;
img.image = [[UIImage alloc] initWithData:dataImage];
UIImageWriteToSavedPhotosAlbum( [[UIImage alloc] initWithData:dataImage], nil, nil, nil);
Hope ,it will work