I am a beginner to swift language and with the help of apple book, I was typing this code on switching colours using buttons.
then in this line: if redswitch.isOn {
it is showing this fatal error. What to do I have no idea. Please help me out.
Here's the code:
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var colourView: UIView!
@IBOutlet weak var redswitch: UISwitch!
@IBOutlet weak var greenswitch: UISwitch!
@IBOutlet weak var blueswitch: UISwitch!
override func viewDidLoad() {
super.viewDidLoad()
updateColor()
// Do any additional setup after loading the view.
}
@IBAction func switchChanged(_sender: UISwitch){
updateColor()
}
func updateColor() {
var red: CGFloat = 0
var green: CGFloat = 0
var blue: CGFloat = 0
if redswitch.isOn {
red = 1
}
if greenswitch.isOn {
green = 1
}
if blueswitch.isOn {
blue = 1
}
let color = UIColor(red: red, green: green,
blue: blue, alpha: 1)
colourView.backgroundColor = color
}
}
HarshiL08_9
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