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iOS Build a Simple iPhone App with Swift 2.0 Improving Our User Interface Changing the Background Color

Prapassorn Tinnabavorn
Prapassorn Tinnabavorn
3,528 Points

Should it be *blue: 1.0* or *blue: 255/255* instead of *blue: 255* ?

I thought the values couldn't go above 1.0 for UIColor :)

1 Answer

Jari Koopman
.a{fill-rule:evenodd;}techdegree seal-36
Jari Koopman
Python Web Development Techdegree Graduate 29,349 Points

Hi Prapassorn,

That's true unless you are a bit cheaty (like me) and create something like this:

extension UIColor {
    static func rgbColor(redValue: CGFloat, greenValue: CGFloat, blueValue: CGFloat, alpha: CGFloat) -> UIColor {
        return UIColor(red: redValue/255.0, green: greenValue/255.0, blue: blueValue/255.0, alpha: alpha)

Which you can call as follows:

UIColor.rgbColor(redValue:255, greenValue:255, blueValue:255, alpha:1.0)

But that's not needed.

Hope this helped!

Regards, Jari