How can I color a UIImage in Swift?

Question

I have an image called arrowWhite. I want to colour this image to black.

func attachDropDownArrow() -> NSMutableAttributedString {
    let im         


        

Answer 1

For swift 4.2 to change UIImage color as you want (solid color)

extension UIImage {
    func imageWithColor(color: UIColor) -> UIImage {
        UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale)
        color.setFill()

        let context = UIGraphicsGetCurrentContext()
        context?.translateBy(x: 0, y: self.size.height)
        context?.scaleBy(x: 1.0, y: -1.0)
        context?.setBlendMode(CGBlendMode.normal)

        let rect = CGRect(origin: .zero, size: CGSize(width: self.size.width, height: self.size.height))
        context?.clip(to: rect, mask: self.cgImage!)
        context?.fill(rect)

        let newImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()

        return newImage!
    }
}

How to use

self.imgVw.image = UIImage(named: "testImage")?.imageWithColor(UIColor.red)