gistfile1.m

- (UIImage*)imageWithImage:(UIImage*)image
              scaledToSize:(CGSize)newSize
                 cropImage:(BOOL)crop {
    // Create a graphics image context
    CGFloat wFactor = newSize.width / image.size.width;
    CGFloat hFactor = newSize.height / image.size.height;
    CGFloat maxFactor = MAX(wFactor, hFactor);
    
    if (crop) {
        UIGraphicsBeginImageContext(newSize);
    } else {
        UIGraphicsBeginImageContext(CGSizeMake(image.size.width * maxFactor, image.size.height * maxFactor));
    }
    
    // Tell the old image to draw in this new context, with the desired
    // new size
    [image drawInRect:CGRectMake(0,0,image.size.width * maxFactor,image.size.height * maxFactor)];
    
    // Get the new image from the context
    UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
    
    // End the context
    UIGraphicsEndImageContext();
    
    // Return the new image.
    return newImage;
}