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

You defined a instance function. It means you need an instance of UIColor in case to use getCustomBlueColor()-method.

It looks like you want to have a class method, instead of the instance method. So you have to change your definition like this:

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

Note the 'class' before func, so the method is now accessible as a class method.

The same story using class methods in a structure:

struct MyColors{
    static func getCustomBlueColor() -> UIColor{
        return UIColor(red:0.043, green:0.576 ,blue:0.588 , alpha:1.00)
    }
}
let color = MyColors.getCustomBlueColor()

If you just want to have a class with some color definitions, I recommend you to use a struct over a class or extension:

struct MyColors{
    static var getCustomBlueColor = { return UIColor(red:0.043, green:0.576 ,blue:0.588 , alpha:1.00) }
}
let color = MyColors.getCustomBlueColor()