Delete an image in NSDocumentDirectory - iphone

Question

I have a custom library that can pick mulitple images from the camera roll, I save my images in the NSDocumentDirectory like this:
for (int i = 0; i < info.count; i++) {
NSLog(#"%#", [info objectAtIndex:i]);
NSArray *paths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory, NSUserDomainMask ,YES );
NSString *documentsDir = [paths objectAtIndex:0];
NSString *savedImagePath = [documentsDir stringByAppendingPathComponent:[NSString stringWithFormat:#"Images%d.png", i]];
ALAssetRepresentation *rep = [[info objectAtIndex: i] defaultRepresentation];
UIImage *image = [UIImage imageWithCGImage:[rep fullResolutionImage]];
//----resize the images
image = [self imageByScalingAndCroppingForSize:image toSize:CGSizeMake(256,256*image.size.height/image.size.width)];
NSData *imageData = UIImagePNGRepresentation(image);
[imageData writeToFile:savedImagePath atomically:YES];
NSLog(#"saving at:%#",savedImagePath);
}
What I wanted to do is I wanted to load it in a thumbnail with UIScrollView then when a specific picture is tapped a AlertView will popup,will ask the user if it wants to delete it. I manage to make it load in a thumbnail view (I use theHSImageSidebarView) and make the AlertVIew popups whenever a user taps in a image. But when I press delete it deletes in the view but not in the NSDocumentDirectory.
This is how I delete my image:
- (void)sidebar:(HSImageSidebarView *)sidebar didRemoveImageAtIndex:(NSUInteger)anIndex {
NSLog(#"Image at index %d removed", anIndex);
[images removeObjectAtIndex:anIndex];
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:#"Images%d.png", anIndex]];
[fileManager removeItemAtPath: fullPath error:NULL];
NSLog(#"image removed");
}

Answer 1

On this line, replace %d with %lu
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:#"Images%d.png", anIndex]];