单击按钮时如何使计数器工作？答案

【问题标题】：How do I make a counter work when you click a button?单击按钮时如何使计数器工作？
【发布时间】：2020-05-13 02:54:48
【问题描述】：

所以我是编码新手，我想让标签在您单击同一个按钮时更改其文本。这样做是虽然你可以使用变量绑定一个 inter get out 和 if 语句，但是隐藏不起作用。代码如下：

@IBAction func buttonOne(_ sender: Any)
{
    var nextText:Int = 1
    nextText += 1

    if nextText == 2
    {
        labelOne.text = "We have a developing situation."
    }

    if nextText == 3
    {
        labelOne.text = "About forty five minutes ago 15 unknown assailant broke into Chicago 1st State Bank"
    }

    if nextText == 4
    {
        labelOne.text = "They are armed and dangerous and have taken numerous hostages"
    }

    if nextText == 5
    {
        labelOne.text = "Your mission is to take you and your partner in to bank and free the hostages"
    }

    if nextText == 5
    {
        labelOne.text = "You shall enter the bank via helicopter and rappel onto the roof, good luck."
    }
}

【问题讨论】：

将nextText 清除为类级属性

标签： swift uibutton int label

【解决方案1】：

在按钮点击功能范围之外声明你的 nextText

var nextText:Int = 1
@IBAction func buttonOne(_ sender: Any)
{

    nextText += 1

    switch nextText{
     case 2 : labelOne.text = "We have a developing situation."
     case 3 : labelOne.text = "About forty five minutes ago 15 unknown assailant broke into Chicago 1st State Bank"
     case 4 : labelOne.text = "They are armed and dangerous and have taken numerous hostages"
     case 5 : labelOne.text = "Your mission is to take you and your partner in to bank and free the hostages"
     case 6 : labelOne.text = "You shall enter the bank via helicopter and rappel onto the roof, good luck."
     default : labelOne.text = ""
    }
}

【讨论】：

【解决方案2】：

或者你可以用这个，

var nextText = 0
var labelText = ""

@IBAction func buttonOne(_ sender: Any) {

 switch nextText{
  case 0 : labelText = "We have a developing situation."
  case 1 : labelText = "About forty five minutes ago 15 unknown assailant broke into Chicago 1st State Bank"
  case 2 : labelText = "They are armed and dangerous and have taken numerous hostages"
  case 3 : labelText = "Your mission is to take you and your partner in to bank and free the hostages"
  case 4 : labelText = "You shall enter the bank via helicopter and rappel onto the roof, good luck."
  default : labelText = ""
 }

labelOne.text = labelText
nextText += 1  

}

【讨论】：