swift - 如何使用字典来填充选择器 View (swift)？

Question

在 Swift 中使用字典填充 UIPickerView 时，如何指定键用作行的标题，而值用于执行计算，例如设置 selectedPower 的值，如下所示？

如果我使用 float 数组，我会按如下方式设置它，但我如何使用字典来实现呢？

class DiagnosticORViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate {

var selectedPower : Float!

let FitAssessment : [String : Float] = ["0.50 flat" : -0.50, "0.25 flat" : -0.25, "aligned" : 0, "0.25 steep" : 0.25, "0.50 steep" : 0.50]

func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {

    return 1    
}

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

    return FitAssessment.count   
}

func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {

    return "\(FitAssessment[row])"
}

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

    selectedPower = FitAssessment[row]   
}

Answer 1

两个独立的数组解决了这个问题。

class DiagnosticORViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate {

var selectedPower : Float!

let FitDescription : [String] = ["0.50 flat", "0.25 flat", "aligned", "0.25 steep", "0.50 steep"]

let FitValue : [Float] = [ -0.50, -0.25, 0,  0.25, 0.50]


@IBOutlet weak var fitAssessmentPicker: UIPickerView!


func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {

    return 1

}

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

    return FitDescription.count

}

func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {

    return FitDescription[row]

}

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

    selectedPower = FitValue[row]
}