Swift Generate A Random Color On A Colorwheel

Question

I'm using the SwiftHSVColorPicker framework and needed to generate a random color on the color wheel.My current way of doing works but something that brightness is off.Here is my code

func generateRandomColor() -> UIColor {
    let lowerx : UInt32 = UInt32(0.0)
    let upperx : UInt32 = 707
    let randomNumberx = arc4random_uniform(upperx - lowerx) + lowerx
    let lowery : UInt32 = UInt32(0.0)
    let uppery : UInt32 = 707
    let randomNumbery = arc4random_uniform(upperx - lowerx) + lowerx
    let c = Colorwheel.colorWheel.hueSaturationAtPoint(CGPoint(x: Double(randomNumberx), y: Double(randomNumbery)))
    let brightness = 1.0
    return UIColor(hue: c.hue, saturation: c.saturation, brightness: CGFloat(brightness), alpha: 1.0)
}

Rajan Maheshwari · Answer 1 · 2016-10-13T20:27:03.890

1

Why don't you use something like

func getRandomColor() -> UIColor{

    let randomRed:CGFloat = CGFloat(arc4random()) / CGFloat(UInt32.max)
    let randomGreen:CGFloat = CGFloat(arc4random()) / CGFloat(UInt32.max)
    let randomBlue:CGFloat = CGFloat(arc4random()) / CGFloat(UInt32.max)

    return UIColor(red: randomRed, green: randomGreen, blue: randomBlue, alpha: 1.0)

}

EDIT:

Try this, In this hue,brightness is also there

func generateRandomColor() -> UIColor {
  let hue : CGFloat = CGFloat(arc4random() % 256) / 256 // use 256 to get full range from 0.0 to 1.0
  let saturation : CGFloat = CGFloat(arc4random() % 128) / 256 + 0.5 // from 0.5 to 1.0 to stay away from white
  let brightness : CGFloat = CGFloat(arc4random() % 128) / 256 + 0.5 // from 0.5 to 1.0 to stay away from black

  return UIColor(hue: hue, saturation: saturation, brightness: brightness, alpha: 1)
}

SwiftHSVColorPicker results

edited Oct 13 '16 at 20:27

answered Oct 13 '16 at 19:36

Rajan Maheshwari

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I couldn't get you, which all colors. – Rajan Maheshwari Oct 13 '16 at 20:04
Unfortunately still didn't work after updated the code.http://oi68.tinypic.com/16ozmo.jpg – James Ikeler Oct 13 '16 at 20:05
@JamesIkeler Can you explain a bit more what is not working, it is generating some random color codes for me – Rajan Maheshwari Oct 13 '16 at 20:07
I getting a random color for the x & y of the colorwheel and displaying it as a uicolor. – James Ikeler Oct 13 '16 at 20:13
Yes I checked the edit and it didn't worked for me.I used the same code before. – James Ikeler Oct 13 '16 at 20:15
you can try different libraries of color picker https://www.cocoacontrols.com/search?q=colorpicker – Rajan Maheshwari Oct 13 '16 at 20:22
I checked the library you are using and it is giving fine results. Check the edit – Rajan Maheshwari Oct 13 '16 at 20:26

Swift Generate A Random Color On A Colorwheel

1 Answers1