ios - How can I create a UIColor from a hex string?

Question

How can I create a UIColor from a hexadecimal string format, such as #00FF00?

Answer 1

I've found the simplest way to do this is with a macro. Just include it in your header and it's available throughout your project.

#define UIColorFromRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]

uicolor macro with hex values

Also formatted version of this code:

#define UIColorFromRGB(rgbValue) 
[UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 
                green:((float)((rgbValue & 0x00FF00) >>  8))/255.0 
                 blue:((float)((rgbValue & 0x0000FF) >>  0))/255.0 
                alpha:1.0]

Usage:

label.textColor = UIColorFromRGB(0xBC1128);

Swift:

static func UIColorFromRGB(_ rgbValue: Int) -> UIColor! {
    return UIColor(
        red: CGFloat((Float((rgbValue & 0xff0000) >> 16)) / 255.0),
        green: CGFloat((Float((rgbValue & 0x00ff00) >> 8)) / 255.0),
        blue: CGFloat((Float((rgbValue & 0x0000ff) >> 0)) / 255.0),
        alpha: 1.0)
}