Swift 如何从UIPickerView获取用户选择的值？

这就是我试图实现的目标：

我想获取用户从两个不同的PickerView中选择的值，并在文本字段中显示该值

let drivingGear = ["1", "12", "36", "60", "84"]

    let boxVal = chooseDrivingGear
    let boxVal2 = chooseDrivenGear1
    let newVal = boxVal / boxVal2
    resultBox1.text = newVal

然而，我无法让它发挥作用，因此我现在尝试以下方法：

@IBAction func chooseBox1Pressed(_sender: UIButton) {
     sender.isHidden = true
     if chooseDrivingGear.isHidden {
         chooseDrivingGear.isHidden = false
      }


      if chooseDrivingGear[row] == "1" {
          let v1 = 1
}

但ChoosedDrivingGear[row]显示此错误：使用未解析的标识符“row”

（pickerview的其他代码）更新：

---

您只需尝试从

pickerViews

获取

selectedRow

，获取所选行的值，并根据需要对值执行计算，以显示在

文本字段中

我在下面提供了一个示例代码

class ViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate
{
    @IBOutlet weak var pickerView1: UIPickerView!
    @IBOutlet weak var pickerView2: UIPickerView!
    @IBOutlet weak var textField: UITextField!

    let drivingGear = ["1", "12", "36", "60", "84"]

    override func viewDidLoad()
    {
        super.viewDidLoad()
    }

    @IBAction func showResult(_ sender: UIButton)
    {
        let val1 = self.drivingGear[self.pickerView1.selectedRow(inComponent: 0)]
        let val2 = self.drivingGear[self.pickerView2.selectedRow(inComponent: 0)]
        if let intVal1 = Int(val1), let intVal2 = Int(val2)
        {
            let result = intVal1 / intVal2
            self.textField.text = String(result)
        }
    }

    func numberOfComponents(in pickerView: UIPickerView) -> Int
    {
        return 1
    }

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int
    {
        return self.drivingGear.count
    }

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String?
    {
        return self.drivingGear[row]
    }
}

如果您仍然面临任何问题，请告诉我。
您在哪里定义了“行”？如果我是在这里定义的，我有这个if语句，因为否则我只有创建pickerview的常规函数。如果pickerView.tag==0{chooseBox1.setTitle（drivingGear[row]，for:.normal）choosedDrivingGear.isHidden=true chooseBox1.isHidden=false}您可以在实际获取选择器值的位置添加代码段吗？因为在您当前的帖子中，没有pickerView的代码。因为基于您的代码并尝试，我们可以帮助您。我已经为我的picker视图添加了其他代码，谢谢。虽然这不能回答您的问题，但我建议使用。我经常使用它，它很简单，效果很好。（无从属关系）showResult函数…除了我已经拥有的函数之外，我还必须创建它吗？或者我可以在我的chooseBox1函数中加入你的内容吗？如果没有，我是否应该控制并拖动文本框来创建该函数？在两个选择器视图都具有选定值后，我希望文本字段显示结果。然后创建一个按钮
显示结果
，并在按钮单击事件中，在文本字段中显示结果。这就是showResult方法所做的。我做了这个@iAction func showResultBox1（uSender:Any）{let val1=self.drivingGear[self.choosedDrivingGear.selectedRow（component:0）]让val2=self.drivingGear[self.choosedDrivingGear.selectedRow（component:0）]如果let intVal1=Int（val1），则让intVal2=Int（val2）{let result=intVal1/intVal2 self.title=String（result）}resultBox1.isHidden=false}但它不会更改按钮以显示计算
class ViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate
{
    @IBOutlet weak var pickerView1: UIPickerView!
    @IBOutlet weak var pickerView2: UIPickerView!
    @IBOutlet weak var textField: UITextField!

    let drivingGear = ["1", "12", "36", "60", "84"]

    override func viewDidLoad()
    {
        super.viewDidLoad()
    }

    @IBAction func showResult(_ sender: UIButton)
    {
        let val1 = self.drivingGear[self.pickerView1.selectedRow(inComponent: 0)]
        let val2 = self.drivingGear[self.pickerView2.selectedRow(inComponent: 0)]
        if let intVal1 = Int(val1), let intVal2 = Int(val2)
        {
            let result = intVal1 / intVal2
            self.textField.text = String(result)
        }
    }

    func numberOfComponents(in pickerView: UIPickerView) -> Int
    {
        return 1
    }

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int
    {
        return self.drivingGear.count
    }

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String?
    {
        return self.drivingGear[row]
    }
}