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

who has the correct values?

Wrong values?

class ViewController: UIViewController {
    let blueColor = [UIColor(red: 0, green: 0, blue: 255/255.0, 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

2 Answers

Oliver Duncan
Oliver Duncan
16,642 Points

It looks like you're putting your instance of UIColor inside of brackets, making your property blueColor of type [UIColor] instead of UIColor. Lose the brackets and it should work.

EDIT - Went back to the challenge, it looks like they actually want you to use 255.0 in your color initializer, not 1 (or 255/255.0 as you had it). In my playground both values work for blue, but that's Swift 3. Anyways, try this:

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