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]
}
请您参考如下方法:
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]
}
