UIImage+tinting.swift

UIImage+tinting.swift

extension UIImage {
    func tinted(with color: UIColor) -> UIImage? {
        let maskImage = cgImage
        let bounds = CGRect(origin: .zero, size: size)
        let renderer = UIGraphicsImageRenderer(size: size)

        // QuartzCore origin .zero is bottom-left, while UIKit's is top-left.
        let tintedButFlippedImage = renderer.image { context in
            let cgContext = context.cgContext
            cgContext.clip(to: bounds, mask: maskImage!)
            color.setFill()
            cgContext.fill(bounds)
        }

        let tintedImage = UIImage(cgImage: tintedButFlippedImage.cgImage!,
                                  scale: tintedButFlippedImage.scale,
                                  orientation: .downMirrored)

        return tintedImage
    }
}