extension UIImage{

    func resizeImageWith(newSize: CGSize) -> UIImage {

        let horizontalRatio = newSize.width / size.width
        let verticalRatio = newSize.height / size.height

        let ratio = max(horizontalRatio, verticalRatio)
        let newSize = CGSize(width: size.width * ratio, height: size.height * ratio)
        UIGraphicsBeginImageContextWithOptions(newSize, true, 0)
        draw(in: CGRect(origin: CGPoint(x: 0, y: 0), size: newSize))
        let newImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return newImage!
    }
}