swift-3.0 將HexColor轉變為UIColor的方法

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// MARK:- 把#ffffff顏色轉為UIColorextension UIColor {    class func colorWithHexString(hex:String) ->UIColor {                var cString = hex.trimmingCharacters(in:CharacterSet.whitespacesAndNewlines).uppercased()                if (cString.hasPrefix("#")) {            let index = cString.index(cString.startIndex, offsetBy:1)            cString = cString.substring(from: index)        }                if (cString.characters.count != 6) {            return UIColor.red        }                let rIndex = cString.index(cString.startIndex, offsetBy: 2)        let rString = cString.substring(to: rIndex)        let otherString = cString.substring(from: rIndex)        let gIndex = otherString.index(otherString.startIndex, offsetBy: 2)        let gString = otherString.substring(to: gIndex)        let bIndex = cString.index(cString.endIndex, offsetBy: -2)        let bString = cString.substring(from: bIndex)                var r:CUnsignedInt = 0, g:CUnsignedInt = 0, b:CUnsignedInt = 0;        Scanner(string: rString).scanHexInt32(&r)        Scanner(string: gString).scanHexInt32(&g)        Scanner(string: bString).scanHexInt32(&b)                return UIColor(red: CGFloat(r) / 255.0, green: CGFloat(g) / 255.0, blue: CGFloat(b) / 255.0, alpha: CGFloat(1))    }}

將以上方法直接複製粘貼至任意類中即可，調用方法如下：

 let tmpColor = UIColor.colorWithHexString(hex: "#FFFFFF") 

swift-3.0 將HexColor轉變為UIColor的方法