Swift UIPickerView 禁用组件

I'm having following UI:

如果使用开关，是否可以仅禁用最后两个组件？如果是这样，我该怎么做？

您无法禁用这些组件。不过您可以尝试这些解决方案。

第一个解决方案：

var selectedRow3 = 3
var selectedRow4 = 3

func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {

            switch component {
    case 3:
        myPicker.selectRow(selectedRow3, inComponent: component, animated: true)
    case 4:
        myPicker.selectRow(selectedRow4, inComponent: component, animated: true)

    default:
        break
    }

}

第二种解决方案：

func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {

    switch component {
    case 3:
        return 1
    case 4:
        return 1
    default:
        return 10
    }
}