UIImage+ createFromUIColor.md

• UIColorからUIImageを生成

extension UIImage {
    
    static func image(filled color: UIColor, size: CGSize = CGSize(width: 1, height: 1)) -> UIImage {
        defer {
            UIGraphicsEndImageContext()
        }
        
        let rect = CGRect(x: 0, y: 0, width: size.width, height: size.height)
        UIGraphicsBeginImageContext(rect.size)
        
        let contextRef = UIGraphicsGetCurrentContext()
        contextRef!.setFillColor(color.cgColor)
        contextRef!.fill(rect)
        
        return UIGraphicsGetImageFromCurrentImageContext()!
    }
}