如何使用 TypedRowControllerType 在 Eureka 4.3 中创建自定义演示者行？

Question

我正在将一个旧项目迁移到 Swift 4，所以我自然也更新到了 Eureka 4.3。

在旧项目中，有一个名为LatitudeSelectorRow 的自定义行显示LatitudeSelectorController。

LatitudeSelectorRow 以前是这样的：

final class LatitudeSelectorRow: SelectorRow<PushSelectorCell<CLLocationDegrees>, LatitudeSelectorController> {
    required init(tag: String?, _ initializer: ((LatitudeSelectorRow) -> ())) {
        super.init(tag: tag)
        initializer(self)

        // Focus on here!!
        presentationMode = PresentationMode.show(controllerProvider: ControllerProvider.storyBoard(storyboardId: "LatitudeSelector", storyboardName: "Main", bundle: nil), completionCallback: {
            _ in
        })
        displayValueFor = {
            ...
        }
    }

    required convenience init(tag: String?) {
        self.init(tag: tag)
    }
}

而LatitudeSelectorController 曾经看起来像这样：

class LatitudeSelectorController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource, TypedRowControllerType {

    /// A closure to be called when the controller disappears.
    public var onDismissCallback: ((UIViewController) -> ())?

    @IBOutlet var latitudePicker: UIPickerView!
    var row: RowOf<CLLocationDegrees>!
    var completionCallback: ((UIViewController) -> ())?
    ...

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        let degrees = latitudePicker.selectedRow(inComponent: 0)
        let minutes = latitudePicker.selectedRow(inComponent: 1)
        let seconds = latitudePicker.selectedRow(inComponent: 2)
        let negative = latitudePicker.selectedRow(inComponent: 3) == 1
        self.row?.value = (Double(degrees) + Double(minutes) / 60.0 + Double(seconds) / 3600.0) * (negative ? -1 : 1)
    }

在 Eureka 4.3 中，这停止了工作。它给了我一个错误，说 LatitudeSelectorController 不能转换为 SelectorViewController。

我试图通过更改 PresentationMode 来解决这个问题：

presentationMode = PresentationMode.segueName(segueName: "selectLatitude", onDismiss: nil)

VC 显示成功，但我注意到row 属性为nil。这意味着无论我在 VC 中选择什么，该行的值都不会改变。

我还尝试让LatitudeSelectorController 继承自SelectorRowController：

class LatitudeSelectorController: SelectorViewController<SelectorRow<PushSelectorCell<Double>>>

并恢复使用PresentationMode.show。

这一次，row 不是 nil，而是整个 VC 都被前面的某个视图覆盖，使我的选择器视图不可见：

如何在 Eureka 4.3 中创建自定义演示者行？我可以不用TypedRowControllerType了吗？

Answer 1

在这里您可以创建并链接两个推送行

<<< PushRow<String>() {
            $0.title = "Title"
            $0.tag = "title"
            $0.options = ["test"]//array values
            $0.value = ""
            $0.selectorTitle = "Choose title"
            $0.onChange { [unowned self] row in
                if row.value != nil{
                    //generate options here for second push row
                }
            }
            }.onPresent { from, to in
                to.dismissOnSelection = true
                to.dismissOnChange = true
            }

<<< PushRow<String>() { row in
            row.title = "new"
            row.selectorTitle = "Choose new"
            row.optionsProvider = .lazy({ (formViewController, completion) in
                row.options = //give new options here
                completion(row.options)
            })
            }.onPresent { from, to in
                to.dismissOnSelection = true
                to.dismissOnChange = true
                to.selectableRowCellUpdate = { cell, row in
                   //get the selected value here(row.selectableValue!) // customization
                }
            }