一个 ViewController 中的多个 UIPickerView [英] Multiple UIPickerView in one ViewController

问题描述

我有两个 UiTextfield，当单击相应的 UiTextfield 时，它们应该显示不同的 UiPickerView ......所以我用了这个if(textField.isFirstResponder() == true)查找已单击的文本字段...这不起作用

I have two UiTextfield which are supposed to show different UiPickerView when clicked on a respective UiTextfield....... so i used this if(textField.isFirstResponder() == true) to find which textfield has been clicked...this does not work

class ViewController: UIViewController, UIPickerViewDataSource , UIPickerViewDelegate {

var pickerData  = ["11", "12", "13"]
var pickerDataOthr = ["ada","daad","ada","daad","ada","daad","ada","daad"]
@IBOutlet weak var textField: UITextField!
@IBOutlet weak var textFieldTwo: UITextField!
@IBOutlet weak var tftw: UITextField!



func pickerCode(){

    let picker: UIPickerView
    picker = UIPickerView(frame: CGRectMake(0, 200, view.frame.width, 300))
    picker.backgroundColor = .whiteColor()

    picker.showsSelectionIndicator = true
    picker.delegate = self
    picker.dataSource = self

    let toolBar = UIToolbar()
    toolBar.barStyle = UIBarStyle.Default
    toolBar.translucent = true
    toolBar.tintColor = UIColor(red: 76/255, green: 217/255, blue: 100/255, alpha: 1)
    toolBar.sizeToFit()

    let doneButton = UIBarButtonItem(title: "Done", style: UIBarButtonItemStyle.Plain, target: self, action: "donePicker")
    let spaceButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil)
    let cancelButton = UIBarButtonItem(title: "Cancel", style: UIBarButtonItemStyle.Plain, target: self, action: "donePicker")

    toolBar.setItems([cancelButton, spaceButton, doneButton], animated: false)
    toolBar.userInteractionEnabled = true

}

func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int{
    return 1
}

func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int{
    var count: Int
    if(textField.isFirstResponder() == true)
    {
        count = pickerData.count
    }
    else
    {
        count = pickerDataOthr.count
    }
    return count
}

func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
    var stro:String
    if(textField.isFirstResponder() == true)
    {
        stro = pickerData[row]
    }
    else
    {
        stro = pickerDataOthr[row]
    }
    return stro
}

func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
    if(textField.isFirstResponder() == true)
    {
         textField.text = pickerData[row]
    }
    else
    {
        textFieldTwo.text = pickerDataOthr[row]
    }

}

func donePicker(){
    if(textField.isFirstResponder() == true)
    {
        textField.resignFirstResponder()
    }
    else
    {
        textFieldTwo.resignFirstResponder()
    }

}

func canclePicker(){
    if(textField.isFirstResponder() == true)
    {
        textField.resignFirstResponder()
    }
    else
    {
        textFieldTwo.resignFirstResponder()
    }
}

}

推荐答案

向每个文本字段添加标签

Adding a tag to every textfield

 var tagMaster: Int!

 func setUpTag(){
   textField.tag = 1
   textField.delegate = self
   textFieldtwo.tag = 2
   textFieldtwo.delegate = self
 }

并且在选择器帮助器方法中通过选择器标签识别点击的选择器.代替

and in the picker helper methods idetify the clicked picker by the picker tags. In place of

 textField.isFirstResponder()

我用过textField.tag

i used textField.tag

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