How to access extension of UIColor in Swift?

Question

I am very new to swift and trying to create an extension of UIColor class as

extension UIColor{

    func getCustomBlueColor() -> UIColor {
        retur         


        

Answer 1

Could use a computed property:

extension UIColor {
  var customBlueColor: UIColor {
    return UIColor(red:0.043, green:0.576 ,blue:0.588 , alpha:1.00)
  }
}

And then to call it:

UIColor().customBlueColor

Answer 2

Swift:

extension UIColor {
    open class var yourOrange: UIColor {
        return UIColor.init(colorLiteralRed: 0.988, green: 0.337, blue: 0.063, alpha: 1)
    }
} 

Answer 3

You just need to change your statement like,

 btnShare.setTitleColor(UIColor().getCustomBlueColor(), forState:.Normal)

More detailed explanation is here.

Answer 4

UIColor Extension Swift 5

extension UIColor {
    static var yourColor:UIColor {
        return UIColor(red: 0.745, green: 0.157, blue: 0.074, alpha: 1)
    }
}

---

Use : view.backgroundColor = .yourColor

Answer 5

You have defined an instance method, which means that you can call it only on an UIColor instance:

let col = UIColor().getCustomBlueColor()
// or in your case:
btnShare.setTitleColor(UIColor().getCustomBlueColor(), forState: .Normal)

The compiler error "missing argument" occurs because Instance Methods are Curried Functions in Swift, so it could equivalently be called as

let col = UIColor.getCustomBlueColor(UIColor())()

(But that would be a strange thing to do, and I have added it only to explain where the error message comes from.)

---

But what you really want is a type method (class func)

extension UIColor{
    class func getCustomBlueColor() -> UIColor{
        return UIColor(red:0.043, green:0.576 ,blue:0.588 , alpha:1.00)
    }
}

which is called as

let col = UIColor.getCustomBlueColor()
// or in your case:
btnShare.setTitleColor(UIColor.getCustomBlueColor(), forState: .Normal)

without the need to create an UIColor instance first.

Answer 6

Swift 3, Swift 4, Swift 5:

extension UIColor {
   static let myBlue = UIColor(red:0.043, green:0.576 ,blue:0.588, alpha:1.00) 
}

Use:

btnShare.setTitleColor(.myBlue, for: .normal)

Or

self.view.backgroundColor = .myBlue

If you use Color Set in *.xcassets (iOS11+). For example, you have a color with the name «appBlue». Then:

extension UIColor {

private static func getColorForName(_ colorName: String) -> UIColor {
    UIColor(named: colorName) ?? UIColor.red
}

static var appBlue: UIColor {
    self.getColorForName("appBlue")
}
}

Use:

self.view.backgroundColor = .appBlue