how to add colored border to uiimage in swift

Question

It is pretty easy to add border to UIImageView, using layers (borderWidth, borderColor etc.). Is there any possibility to add border to image, not to image view? Does somebo

Answer 1

Use this simple extension for UIImage

extension UIImage {

    func outline() -> UIImage? {

        UIGraphicsBeginImageContext(size)
        let rect = CGRect(x: 0, y: 0, width: size.width, height: size.height)
        self.draw(in: rect, blendMode: .normal, alpha: 1.0)
        let context = UIGraphicsGetCurrentContext()
        context?.setStrokeColor(red: 1.0, green: 0.5, blue: 1.0, alpha: 1.0)
        context?.setLineWidth(5.0)
        context?.stroke(rect)
        let newImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()

        return newImage

    }

}

It will give you an image with pink border.