swift - 如何将多个 UIStepper 值添加到一个标签？

Question

我现在正在处理我的第一个 Swift 项目。我有 2 个步进器和一个标签 - 两个步进器都将它们的值发送给它。如何将第二个步进器的值添加到标签中，其中第一步进器的值已经存在？这是我的代码:

override func viewDidLoad() {
    super.viewDidLoad()


    stepper.wraps = true
    stepper.autorepeat = true
    stepper.maximumValue = 10000
    stepper2.wraps = true
    stepper2.autorepeat = true
    stepper2.maximumValue = 10000

}

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

@IBOutlet weak var valueLabel: UILabel!
@IBOutlet weak var stepper: UIStepper!
@IBAction func stepperValueChanged(sender: UIStepper) {
    valueLabel.text = Int(sender.value).description
}



@IBOutlet weak var stepper2: UIStepper!
@IBAction func stepper2ValueChanged(sender: UIStepper) {
    valueLabel.text = Int(sender.value).description
}

谢谢!

Answer 1

如果您想将两个值组合成一个字符串并在您的标签上显示这个字符串，那么您必须创建一个新函数来为您执行此操作。我在你的代码中添加了这样一个函数:`

类 View Controller :UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()

    stepper.wraps = true
    stepper.autorepeat = true
    stepper.maximumValue = 10000
    stepper2.wraps = true
    stepper2.autorepeat = true
    stepper2.maximumValue = 10000

}

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

@IBOutlet weak var valueLabel: UILabel!
@IBOutlet weak var stepper: UIStepper!

@IBAction func stepperValueChanged(sender: UIStepper) {

    // valueLabel.text = Int(sender.value).description
    addValuesToASumAndPutItIntoTheLabel()
}

@IBOutlet weak var stepper2: UIStepper!
@IBAction func stepper2ValueChanged(sender: UIStepper) {

    // valueLabel.text = String(sender.value)
    addValuesToASumAndPutItIntoTheLabel()

}

func addValuesToASumAndPutItIntoTheLabel() {
    let summe : Int = Int(stepper.value + stepper2.value)
    valueLabel.text = summe.description
}

}`