[swift] Util(UIImage)

UIImageExt

public extension UIImage {

    

    //Image resize width

    //ex -> image.widthScaledImage(maximumWidth:300)

    func widthScaledImage(maximumWidth: CGFloat) -> UIImage {

        let scale = maximumWidth / self.size.width

        let newHeight = self.size.height * scale

        UIGraphicsBeginImageContext(CGSize(width:maximumWidth, height:newHeight))

        self.draw(in: CGRect(x: 0, y: 0, width:maximumWidth, height:newHeight))

        let newImage = UIGraphicsGetImageFromCurrentImageContext()

        UIGraphicsEndImageContext()

        return newImage!

    }

    

    //Image Nine patch center

    //ex -> image.imageCenterNinePath(centerPixel:2)

    func imageCenterNinePath(centerPixel:CGFloat) -> UIImage {

        let w = (self.size.width - centerPixel)/2

        let h = (self.size.height - centerPixel)/2

        return self.resizableImage(withCapInsets: UIEdgeInsetsMake(h, w, h, w))

    }

}