'[String]'没有名为'text'的成员Swift

Question

我尝试解决此问题已有一段时间，但尚未找到任何解决方案。 '[String]' does not have a member named 'text'在let c:Int? = conversion.text.toInt() '[String]' does not have a member named 'text' let c:Int? = conversion.text.toInt() let c:Int? = conversion.text.toInt() 。 我知道这与字符串是浮点数有关。 解决办法是什么？

 @IBOutlet var pickerView1: UIPickerView!

        @IBOutlet var textField1: UITextField!
        @IBOutlet weak var enterUnits: UITextField!
        @IBOutlet var answerConversion: UITextField!
        var measurements = ["m to feet","cm to inches", "mm to inches"]
        var conversion = ["3.12","4.54","5.23"]    

Pickerview

    func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int)  {
            if pickerView.tag == 0 {

                let a:Int? = enterUnits.text.toInt()
                let c:Int? = conversion.text.toInt()

                let answer = (a!) * (c!)
                textField1.text = measurements[row]
                answerConversion.text = conversion[row]
                answerConversion.text = "\(answer)"

                }

Answer 1

您可以声明Double而不是String的数组

 let conversion = [3.12,4.54,5.23] 

在pickerView中，您可以像

let c = conversion[row]

Answer 2

[String]没有属性文本，这就是为什么出现错误的原因。 您需要先使用索引调用[String] ，然后才能将其转换为int。

例：

myStringArray[myIndex].toInt()