Question

我将旧项目迁移到Swift 4，因此自然地我也更新到了Eureka 4.3。

在旧项目中，有一个名为LatitudeSelectorRow的自定义行，它显示一个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)
    }
}

LatitudeSelectorController过去看起来像这样：

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，它停止工作。这给我一个错误，说LatitudeSelectorController无法转换为SelectorViewController。

我试图通过更改PresentationMode来解决此问题：

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

已成功显示VC，但是我注意到row属性为nil。这意味着无论我在VC中选择什么，该行的值都不会更改。

我还尝试使LatitudeSelectorController从SelectorRowController继承：

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

，并恢复为使用PresentationMode.show。

这次，row不是零，但是整个VC都被前面的某些视图覆盖，这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？我可以不再使用TypedRowControllerType吗？

Answer 1

您可以在此处创建并相互链接两个推送行

<<< 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
                }
            }

如何在Eureka 4.3中使用TypedRowControllerType创建自定义演示者行？

1 个答案: