Scaling an image in iOS

The UIImage class can be used to represent an image. The following snippet scales an image according to a size which is provided with a CGSize parameter.

+ (UIImage *)scale:(UIImage *)image toSize:(CGSize)size

{

    UIGraphicsBeginImageContext(size);

    [image drawInRect:CGRectMake(0, 0, size.width, size.height)];

    UIImage *scaledImage = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return scaledImage;

}