Get Slightly Lighter and Darker Color from UIColor

Question

I was looking to be able to turn any UIColor into a gradient. The way I am intending to do this is by using Core Graphics to draw a gradient. What I am trying to do is to ge

Answer 1

Ideally, the functions should be encapsulated inside a UIColor extension called, UIColor+Brightness.swift, and have a configurable brightness - see example below:

import UIKit

extension UIColor {

  func lighterColorWithBrightnessFactor(brightnessFactor:CGFloat) -> UIColor {
    var r:CGFloat = 0, g:CGFloat = 0, b:CGFloat = 0, a:CGFloat = 0
    if self.getRed(&r, green:&g, blue:&b, alpha:&a) {
      return UIColor(red:min(r + brightnessFactor, 1.0),
        green:min(g + brightnessFactor, 1.0),
        blue:min(b + brightnessFactor, 1.0),
        alpha:a)
    }
    return UIColor()
  }

}