I want to make a button that makes the background switch between red and green but I get this error:
missing return in a function expected to return UIView
I'm pretty new to coding, I've googled a bit but I didn't find anything.
Language:Swift
my code:
var timeLeft = 0
import UIKit
class ViewController: UIViewController {
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.
}
var buttonColor: UIView! {
timeLeft = 1
}
func update() {
if timeLeft > 0 {
view.backgroundColor = UIColor.greenColor()
}
else {
view.backgroundColor = UIColor.redColor()
}
timeLeft = timeLeft - 1
}
}
thanks for helping
Hi and welcome to stackoverflow
Remember to make an action connecting your UIButton to the code. Otherwise your code will not run when you click on the button. Also, consider using a Bool (true/false) variable to keep track of the background color.
Try the following code (remember to connect the 'click'-function to the button via the storyboard):
import UIKit
class ViewController: UIViewController {
var isGreen = true
@IBAction func click() {
if isGreen {
view.backgroundColor = UIColor.redColor()
isGreen = false
} else {
view.backgroundColor = UIColor.greenColor()
isGreen = true
}
}
}
var buttonColor: UIView! { get() { return (Object of UIView) } }
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