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iOS Build a Simple iPhone App with Swift 2.0 Improving Our User Interface Changing the Background Color

Posted by Matt Conway
Matt Conway
1,572 Points

UIColor

This should work, but it doesn't. Wonder why?

Challenge Task 2 of 2

Now that we have an instance of UIColor as a stored property, let's change the background color of the backing view.

Access the view controller's backing view and assign the UIColor instance to the view's backgroundColor property.

/Users/mattconway/Desktop/Screen Shot 2016-02-05 at 7.11.44 PM.png

colors.swift 
class ViewController: UIViewController {
  let blueColor = UIColor(red: 0, green: 0, blue: 255, alpha: 1.00)
  view.backgroundColor = blueColor

    override func viewDidLoad() {
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        // Dispose of any resources that can be recreated
    }
}

1 Answer

Steven Deutsch
Steven Deutsch
21,046 Points
Steven Deutsch
Steven Deutsch
21,046 Points

Hey Matt Conway,

You have all the syntax. You just need to move some code around. You need to assign the backgroundColor of the view inside of the viewDidLoad method.

class ViewController: UIViewController {

  let blueColor = UIColor(red: 0, green: 0, blue: 255, alpha: 1.0)

    override func viewDidLoad() {
        // Do any additional setup after loading the view, typically from a nib.
          view.backgroundColor = blueColor
    }

    override func didReceiveMemoryWarning() {
        // Dispose of any resources that can be recreated
    }
}

Hope this helps. Good Luck.