ios - 我无法从外部文件设置 uipickerview 数据源和委托(delegate)

Question

我似乎无法设置外部 pickerview 数据源并委托(delegate)给我的主视图。我可以设置吗？我想将我的 pickerview 保存在一个单独的文件中，因为将来其他 View 可能会使用它

这是我的自定义选择器 View

final class LenghtPickerView: UIPickerView, UIPickerViewDataSource, UIPickerViewDelegate {

    let feet = Array(4...7)
    let inches = Array(1...11)

    private var textFieldBeginEdited: UITextField?

    var selectedValue: String {
        get {
            return "\(feet[selectedRow(inComponent: 0)]) ft \(inches[selectedRow(inComponent: 0)]) in"
        }
    }

    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 2
    }

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        if component == 0 {
            return feet.count
        } else {
            return inches.count
        }
    }

    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        if component == 0 {
            return String(feet[row])
        } else {
            return String(inches[row])
        }
    }
}

并在我的主视图中声明它私有(private)让lenghtPickerView = LenghtPickerView()也尝试过private let lenghtPickerView: LenghtPickerView = LenghtPickerView()

无法设置数据源和委托(delegate)来渲染数据

lenghtPickerView.delegate = self
lenghtPickerView.dataSource = self 

Answer 1

如果你设置

lenghtPickerView.delegate = self

lenghtPickerView.dataSource = self

从您的主视图。

这意味着您的选择器的委托(delegate)和数据源应该在您的主视图中采用