Swift 代表不工作

Question

我的 ViewController 中有一个步进器，用于控制 UIView 中变量的值。当我在 UIView 中将变量重置为 0 时，我也希望步进器和标签重置，但它们不会。我尝试使用委托，但出现错误。提前致谢！

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()
        }
    }
}

Answer 1

不要在 viewDidLoad 中像这样分配代表 circleViewDelegate!.delegate = self 尝试 circleView1.delegate = self

Answer 2

试试这个：

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)
}

Swift 代表不工作

Swift delegate not working

delegates

uiview

viewcontroller

ios

swift