从另一个 pickerView 选择项目时隐藏 pickerView 的行

Question

我创建了一个 UIPickerView 使用数组作为我的数据源，我想在第三个组件上选择一个项目后隐藏第四个组件上的一些项目。我该怎么做？

class ViewControllerEspessuras: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {

    var data = [["1.50","1.60","1.67","1.74"],
                ["-10.00 Esf.","-9.00 Esf.","-8.00 Esf.","-7.00 Esf.","-6.00 Esf.","-5.00 Esf.","-4.00 Esf.","-3.00 Esf.","-2.00 Esf.","-1.00 Esf.","Plano","+1.00 Esf.","+2.00 Esf.","+3.00 Esf.","+4.00 Esf.","+5.00 Esf.","+6.00 Esf.","+7.00 Esf.","+8.00 Esf.","+9.00 Esf.","+10.00 Esf."],
                ["1.50","1.60","1.67","1.74"],
                ["-10.00 Esf.","-9.00 Esf.","-8.00 Esf.","-7.00 Esf.","-6.00 Esf.","-5.00 Esf.","-4.00 Esf.","-3.00 Esf.","-2.00 Esf.","-1.00 Esf.","Plano","+1.00 Esf.","+2.00 Esf.","+3.00 Esf.","+4.00 Esf.","+5.00 Esf.","+6.00 Esf.","+7.00 Esf.","+8.00 Esf.","+9.00 Esf.","+10.00 Esf."]]

    func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
        return 4
    }
    func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return data[component].count
    }

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

    func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        let picker1 = data[0][pickerView.selectedRowInComponent(0)]
        let picker2 = data[1][pickerView.selectedRowInComponent(1)]
        let picker3 = data[2][pickerView.selectedRowInComponent(2)]
        let picker4 = data[3][pickerView.selectedRowInComponent(3)]
    }
}

Answer 1

您应该更改 numberOfRowsInComponent e titleForRow forComponent 以便他们考虑第三行的选择。

之后，当第三个组件发生变化时，您只需在最后一个组件上调用 reloadComponent。

您可以通过以下 SO 问题之一获得更多信息：

disabling the values in one component of picker based on value selected in other component
How to change the picker rows based on another picker's selection?

从另一个 pickerView 选择项目时隐藏 pickerView 的行

Hide rows of a pickerView when selecting an item from another pickerView

uipickerview

ios

swift