我是 swift 的新手。 也许有人可以帮助我。 我用自己的数据填充 pickerView。
我可以在数据后面存入一个值吗?
声明如下:
如果用户在 pickerView
上选择一些孔径,存款值(用户看不到存款值)应该转到标签吗?为了进一步计算?
示例:孔径 Ø 6(存款值为 0,4)标签显示 0,4 ccm
import Foundation
class Balkenbewehrung : UIViewController, UIPickerViewDataSource, UIPickerViewDelegate {
let pickerData = ["Ø 6","Ø 8","Ø 10","Ø 12","Ø 14","Ø 16","Ø 20",
"Ø 25","Ø 26","Ø 28","Ø 30","Ø 32","Ø 36","Ø 40","Ø 50"]
@IBOutlet weak var myPicker: UIPickerView!
@IBOutlet weak var myLabel: UILabel!
override func viewDidLoad() {
self.view.addGestureRecognizer(self.revealViewController().panGestureRecognizer())
myPicker?.delegate = self
myPicker?.dataSource = self
}
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return pickerData.count
}
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {
return pickerData[row]
}
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
myLabel.text = pickerData[row]
}
}
来自德国的感谢
最佳答案
使用预先计算的值构建数据结构并尝试此方法
class ViewController : UIViewController, UIPickerViewDataSource, UIPickerViewDelegate {
@IBOutlet weak var myLabel: UILabel!
@IBOutlet weak var myPicker: UIPickerView!
var pickerDictionary: Dictionary<String, String> = ["Ø 6" : "0,4 ccm",
"Ø 8" : "0,6 ccm",
"Ø 10" : "0,8 ccm",
"Ø 12" : "0,10 ccm",
"Ø 14" : "0,12 ccm" ]
override func viewDidLoad() {
myPicker?.delegate = self
myPicker?.dataSource = self
}
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return pickerDictionary.count
}
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {
return pickerDictionary.keys.array[row]
}
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
myLabel.text = pickerDictionary[pickerDictionary.keys.array[row]]
}
}
关于ios - UIPickerView - 用于计算的值传递,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/31804336/