Change View Color based on another View's Color

Question

I have a simple iOS app written in Swift that chooses a random background color every time a button is pushed. There is a "Credits" button in the view that acts as a modal segue to another view. How would I go about setting the color of the second view based on whatever color the background is in the first view?

Answer 1

You need to pass color from first controller to second. below is the snippet.

 let destinationVC:ViewControllerClass = segue.destinationViewController as! ViewControllerClass
destinationVC.color = view.backgroundColor

Answer 2

You can archive this like this:

override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!) {
    if (segue.identifier == "Load View") {
        // pass data to next view
       let viewController:ViewController = segue!.destinationViewController as  ViewController
       viewController.view.backgroundColor = self.view.backgroundColor   
    }
}

Answer 3

You can pass some arguments to the view controller you're presenting or pushing by overriding prepareForSegue method :

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {        
     if let secondViewController = segue.destinationViewController as? MySecondViewControllerClass {
        secondViewController.view.backgroundColor = view.backgroundColor   
     }
}

You can find more infos available about prepareForSegue on UIViewController documentation from Apple.