如何在Swift中获取数据，内部if/else语句

Question

我在ViewController和Struct中有两个pickerView，我在其中创建了一个函数，该函数将获取pickerViews的数据。在PickerView的didSelectRow函数中，我编写了以下代码。

func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
if pickerView == fromPickerViewRolled {
let optionArray1 = currencyManager.currencyArrayOption1[row]
}
else if pickerView == toPickerViewRolled {

let optionArray2 = currencyManager.currencyArrayOption2[row]   
}
}

如何获取optionArray1和…的数据。。数组2在if/else之外，这样我就可以在函数中使用。如有任何帮助，我们将不胜感激。期待着答案。

Answer 1

您只需要在if语句块之外声明一个数组。像这样：

func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
var currencyArray: [YourType] = []
if pickerView == fromPickerViewRolled {
currencyArray = currencyManager.currencyArrayOption1[row]
}
else if pickerView == toPickerViewRolled {
currencyArray = currencyManager.currencyArrayOption2[row]
}
dump(currencyArray)
}