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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

Color codes

Wonder why this doesn't work?

Challenge Task 1 of 2

Let's get some practice working with views and colors! In the editor below you have a view controller subclass.

Add a stored property to the view controller named blueColor and assign an instance of UIColor as the default value.

You can use UIColor's RGB initializer method and pass the values 0,0,255,1.0 for red, green, blue and alpha respectively. Alternatively, UIColor has a convenience method that you can use: UIColor.blueColor().

/Users/mattconway/Desktop/Screen Shot 2016-02-05 at 3.14.55 PM.png

colors.swift 
class ViewController: UIViewController {
  let blueColor = [
    UIColor(red: 0, green: 0, blue: 255/255.0, alpha: 1.0)
    ]
    view.UIColor.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

Roman Lopez
Roman Lopez
2,211 Points

Hello Matt! It looks like you are doing great!!! way to go!

I think I have your solution. Try this. 

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.
    }

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