Swift delegate not working

Question

I have a stepper in my ViewController that controls the value of a variable in my UIView. When I reset the variables to 0 in my UIView, I also want the stepper and label to reset, but they won't. I tried using a delegate, but am getting an error. Thanks in advance!

ViewController:

protocol CircleViewDelegate: class {
    func updateStepper(view: CircleView)
}

class ViewController: UIViewController, CircleViewDelegate {

var colors = CircleView()

@IBOutlet weak var circleView1: CircleView!
@IBOutlet weak var blueStepper: UIStepper!
@IBOutlet weak var greenStepper: UIStepper!
@IBOutlet weak var redStepper: UIStepper!

@IBOutlet weak var redValue: UILabel!
@IBOutlet weak var greenValue: UILabel!
@IBOutlet weak var blueValue: UILabel!

var circleViewDelegate: CircleView!

override func viewDidLoad() {
    super.viewDidLoad()
    circleViewDelegate!.delegate = self
}

func updateStepper(view: CircleView) {
    redStepper.value=0.0;
    greenStepper.value=0.0;
    blueStepper.value=0.0;
}

@IBAction func stepperChange(sender: UIStepper) {
    circleView1.redd1 = Int(redStepper.value);
    redValue.text = Int(sender.value).description;
}

@IBAction func stepperChange1(sender: UIStepper) {
    circleView1.greenn1 = Int(greenStepper.value);
    greenValue.text = Int(sender.value).description;
}

@IBAction func stepperChange2(sender: UIStepper) {
    circleView1.bluee1 = Int(blueStepper.value);
    blueValue.text = Int(sender.value).description;
}

}

UIView:

class CircleView: UIView {    
    var redd1 = 0
    var greenn1 = 0
    var bluee1 = 0

    weak var delegate: CircleViewDelegate?

    func updateStepper() {
        delegate?.updateStepper(self)
    }

    func game() {
        if(redd1==Int(red1) && greenn1==Int(green1) && bluee1==Int(blue1)) {
            redd1 = 0;
            green1 = 0;
            blue1 = 0;
            updateStepper()
        }
    }
}

on this line: circleViewDelegate!.delegate = self , i get the error: EXC_BAD_INSTRUCTION — Steve
– Steve, Commented Feb 12, 2016 at 3:15
You don't need circleViewDelegate - you want to say circleView1.delegate=self — Paulw11
– Paulw11, Commented Feb 12, 2016 at 3:30
thanks i fixed it, but I'm still having the problem in my question — Steve
– Steve, Commented Feb 12, 2016 at 3:32

Mark · Accepted Answer · 2016-02-12 03:43:41Z

2

Try this:

override func viewDidLoad() {
    super.viewDidLoad()
    circleView1.delegate = self
}

func updateStepper(view: CircleView) {
    redStepper.value = 0.0
    greenStepper.value = 0.0
    blueStepper.value = 0.0

    stepperChange(redStepper)
    stepperChange(greenStepper)
    stepperChange(blueStepper)
}

edited Feb 12, 2016 at 3:43

answered Feb 12, 2016 at 3:40

Mark

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1 Comment

Mark Over a year ago

I've updated the answer to call the IBAction method you were probably expecting to be called. This will update both the label and the CircleView.

Kyle Redfearn · Accepted Answer · 2016-02-12 03:33:59Z

1

Instead of assigning the delegate like this circleViewDelegate!.delegate = self in viewDidLoad try circleView1.delegate = self

answered Feb 12, 2016 at 3:33

Kyle Redfearn

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1 Comment

Steve Over a year ago

it fixed the error but i still have the same problem in my question

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