Swift Random Color Generator - swift

Question

Is it possible to change the color a button with a label using a random generator?
For ex.. Label "A" is the title/color dictator and will notify "Button 1 and Button 2" what colors they will generate to be randomly.

Answer 1

let randomRed:CGFloat = CGFloat(arc4random_uniform(256))
let randomGreen:CGFloat = CGFloat(arc4random_uniform(256))
let randomBlue:CGFloat = CGFloat(arc4random_uniform(256))
let myColor = UIColor(red: randomRed/255, green: randomGreen/255, blue: randomBlue/255, alpha: 1.0)

Answer 2

Try this code:
Answer 1: Generate random colour from array(restrict to 3 colour)
Note: you have to set initial backgroundColor to your button in viewDidLoad
yourButtonName.backgroundColor = .red // set any colour
//Button background array
let buttonBG = [UIColor.red,UIColor.green,UIColor.black]
//Button title colour array
let buttonTitle = [UIColor.orange,UIColor.cyan,UIColor.yellow]
Usage: Try below code inside your button action.It will generate randomColor assigned from array...
let BGRandomIndex = Int(arc4random_uniform(UInt32(buttonTitle.count)))
yourButtonName.tintColor = buttonTitle[BGRandomIndex]
let TitleRandomIndex = Int(arc4random_uniform(UInt32(buttonBG.count)))
yourButtonName.backgroundColor = buttonBG[TitleRandomIndex]
Answer 2: Generate Random Colour.
func randomCGFloat() -> CGFloat {
return CGFloat(arc4random()) / CGFloat(UInt32.max)
}
func randomColor() -> UIColor {
let r = randomCGFloat()
let g = randomCGFloat()
let b = randomCGFloat()
// If you wanted a random alpha, just create another
// random number for that too.
return UIColor(red: r, green: g, blue: b, alpha: 1)
}
Usage: Try below code inside your button action.It will generate randomColor on every button click...
yourButtonName.backgroundColor = randomColor() // to get random background button backgroundColor
yourButtonName.tintColor = randomColor() //to get random background button title color

Answer 3

public func getRandomColor() -> UIColor{
let randomRed:CGFloat = CGFloat(drand48())
let randomGreen:CGFloat = CGFloat(drand48())
let randomBlue:CGFloat = CGFloat(drand48())
return UIColor(red: randomRed, green: randomGreen, blue: randomBlue, alpha: 1.0)
}
You're going to need a function to produce random CGFloats in the range 0 to 1:
you can use
CGFloat(arc4random()) / CGFloat(UInt32.max)
alternate for drand48()
If you want a alpha as a random, just create another random number for that
Just create a random background for your view like
self.view.backgroundColor = UIColor().getRandomColor()