更新按钮上的标签单击-Java 学习之路

我的主页上有两个按钮作为左右箭头，每次点击一个按钮，UILabel都会通过数组更新，例如 let names = ["John, Smith, "Ahmed", "Jack", "Kathy"] . 我有两个UIActions作为rightArrowClicked和leftArrowClicked . 最初，标签应显示为John，禁用左箭头，'ll be done by the isHidden property of leftArrow and likewise when the value is Kathy then rightArrow should be disabled. Along with that i also need to update another label w.r.t to the name value e.g john can have a value of 816167 , and kathy as 816168 and these values are coming from an external library which i' ve通过 cocoapods 添加，这是在该类的功能中生成的 . 任何想法我会怎么做？

2 回答

这是您需要的具有简单逻辑的代码

let names = ["John", "Smith", "Ahmed", "Jack", "Kathy"]
var currentIndex = 0
leftButton.isHidden = true

@IBAction func left(_ sender: Any) {
    currentIndex --
    label.text = names[currentIndex]

    if currentIndex == 0 {
        leftButton.isHidden = true
    }

    rightButton.isHidden = false


}

@IBAction func right(_ sender: Any) {
    currentIndex ++
    label.text = names[currentIndex]

    if currentIndex == names.count - 1 {
        rightButton.isHidden = true
    }

    leftButton.isHidden = false

}

回复于 2024-05-03T09:45:49+08:00

您可以尝试如下，并在viewDidLoad方法中调用updateButtonsState（）

let names = ["John", "Smith", "Ahmed", "Jack", "Kathy"]
let nature = ["cute", "pretty", "cute", "pretty", "cute"]
var currenIndex = 0

@IBAction func leftBtnClick(_ sender: UIButton) {
        currenIndex = currenIndex - 1
        updateButtonsState()

    }
    @IBAction func rignthBtnClick(_ sender: UIButton) {
        currenIndex = currenIndex + 1
        updateButtonsState()
    }
    func updateButtonsState() {
        leftBtn.isEnabled = currenIndex > 0 ? true : false
        rightBtn.isEnabled = currenIndex < names.count - 1 ? true : false
        if currenIndex >= 0 && currenIndex < names.count {
            lblName.text = names[currenIndex]
            lblNameWithNature.text = nature[currenIndex]
        }
        print("currenIndex == \(currenIndex)")
    }

回复于 2024-05-03T09:45:49+08:00

更新按钮上的标签单击

2 回答

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