Swift - Use a variable from one ViewController in another

Question

I am currently building an application with Swift 3 and have defined a color in one ViewController with an let ... = ... statement and want to use this color in another ViewController too without defining it new. Any ideas?

Answer 1

The simplest solution is to define that variable outside of class, for example

import UIkit

let color = UIColor.red

class ScanViewController: UIViewController  {
....
}

Answer 2

also you could override the init function of the another ViewController, just like:

override init(withColor color: UIColor){
    super.init(nibName: nil, bundle: nil);
}

then you could pass the color as the param:

let viewController = ViewController(withColor: UIColor.red);

but I think the best way is define it globally.