ios - 我如何设置标签以便在按下按钮时它会更改标签上显示的值

Question

我如何设置标签以便在按下按钮时它会更改标签上显示的值并将其设置为每次按下按钮时它们都会添加到之前的数字上按下 - 是否可以在同一个 View Controller 上设置 2 个 View 场景？

    @IBOutlet weak var creditLabel: UILabel!

    var savedNum:Int = "Credits: /0"

    var Money : Int!

    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.
    }




    @IBAction func oneDollar(_ sender: Any) {
        let oneDollar = 1
    }

    @IBAction func fiveDollars(_ sender: Any) {
        let fiveDollars = 5
    }

    @IBAction func tenDollars(_ sender: Any) {
        let tenDollars = 10
    }
    @IBAction func twentyDollars(_ sender: Any) {
        let twentyDollars = 20
    }
    @IBAction func fiftyDollars(_ sender: Any) {
        let fiftyDollars = 50
    }
    @IBAction func oneHundredDollars(_ sender: Any) {
        let oneHundredDollars = 110
    }

}

Answer 1

我想你想做的是这样的……

class ViewController: UIViewController {

    @IBOutlet weak var creditLabel: UILabel!

    var credit = 0 {
       didSet {
           creditLabel.text = "Credit: $\(credit)"
       }
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        credit = 0
    }


    @IBAction func oneDollar(_ sender: Any) {
        credit += 1
    }

    @IBAction func fiveDollars(_ sender: Any) {
        credit += 5
    }

    // etc
}