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

George Gregorczyk
George Gregorczyk
3,028 Points
Posted by George Gregorczyk
George Gregorczyk
3,028 Points

UI Color

Could someone tell me what is wrong with my code?

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

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

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

1 Answer

Steven Parker
Steven Parker
229,785 Points
Steven Parker
Steven Parker
229,785 Points

Specifying "255/255.0" for the blue argument is taken as a divide operation, causing it to be set to 1 instead of 255.

But the instructions give you a hint about an even easier way to get the color:

   let blueColor = UIColor.blue
George Gregorczyk
George Gregorczyk
3,028 Points
George Gregorczyk
George Gregorczyk
3,028 Points

Thank you, I just wanted to use the harder way so that I know how to code complex colors.