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swift Hex 색상으로 색상 입히기

Posted by Albert 2796Day 16Hour 34Min 54Sec ago [2017-08-23]

//swift 2

func hexStringToUIColor (hex:String) -> UIColor {

var cString:String = hex.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet() as NSCharacterSet).uppercaseString

if (cString.hasPrefix("'")) {

cString = cString.substringFromIndex(cString.startIndex.advancedBy(1))

}

if ((cString.characters.count) != 6) {

return UIColor.grayColor()

}

var rgbValue:UInt32 = 0

NSScanner(string: cString).scanHexInt(&rgbValue)

return UIColor(

red: CGFloat((rgbValue & 0xFF0000) >> 16) / 255.0,

green: CGFloat((rgbValue & 0x00FF00) >> 8) / 255.0,

blue: CGFloat(rgbValue & 0x0000FF) / 255.0,

alpha: CGFloat(1.0)

)

}

//swift 3

func hexStringToUIColor (hex:String) -> UIColor {
    var cString:String = hex.trimmingCharacters(in: .whitespacesAndNewlines).uppercased()

    if (cString.hasPrefix("'")) {
        cString.remove(at: cString.startIndex)
    }

    if ((cString.characters.count) != 6) {
        return UIColor.gray
    }

    var rgbValue:UInt32 = 0
    Scanner(string: cString).scanHexInt32(&rgbValue)

    return UIColor(
        red: CGFloat((rgbValue & 0xFF0000) >> 16) / 255.0,
        green: CGFloat((rgbValue & 0x00FF00) >> 8) / 255.0,
        blue: CGFloat(rgbValue & 0x0000FF) / 255.0,
        alpha: CGFloat(1.0)
    )
}

사용시

xxx.backgroundColor = hexStringToUIColor("'ffffff")

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