How to tag programmed textfields featured in a extension file (swift4)

[timswift]

I want to tag both textfield ana and sampleTextfield. So that in the extension field I can do things like call different pickerviews for each textfireld. Example:

            func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
if tag ==1 {
    return firstHit[row]
} else {
    return sendHit[row]
} }

Code:

            var ana =  UITextField(frame: CGRect(x: -20, y: 100, width: 300, height: 40))
     var sampleTextField =  UITextField(frame: CGRect(x: 20, y: 100, width: 300, height: 40))

   extension ViewController: UIPickerViewDelegate, UIPickerViewDataSource {
  func numberOfComponents(in pickerView: UIPickerView) -> Int {
   return 1
   }

    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
      return firstHit.count
   }

   func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
   return firstHit[row]
 }

 func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
   selecteDay = firstHit[row]
   sampleTextField.text = selecteDay
}

func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
   var lable: UILabel
   if let view = view as? UILabel {
       lable = view
   } else {
       lable = UILabel()
   }

   lable.textColor = .white
   lable.textAlignment = .center
   lable.font = UIFont(name: "Menlo-Regular", size: 17)
   lable.text = firstHit[row]
   return lable
 }}

[vimipatel]

Hello @timswift

You can assign tag to UITextField, but we cannot identify them in PickerView Delegate.

So you need to do this way to identify your textfield and load data :

func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
      if ana.isFirstResponder {
          return firstHit.count
    }
    else if sampleTextField.isFirstResponder {
        return sendHit.count
    }
}

func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
    if ana.isFirstResponder {
        return firstHit[row]
    }
    else if sampleTextField.isFirstResponder {
        return sendHit[row] 
    }
}

func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
    if ana.isFirstResponder {
        selecteDay = firstHit[row]
        sampleTextField.text = selecteDay
    }
    else if sampleTextField.isFirstResponder {
          // Do something
    }
}

[timswift]

@vimipatel do I put this code in the extension file.

[jayantvarma]

Hi @timswift,
As a rule of thumb, extensions do not have specific items. So if you have a label or a textfield then it would not go into an extension of a class that you do not own or have access to. In this case, the textfield belongs to the viewcontroller but you would have a UIPickerView extension.

Unless you mean something else when you say extension.

cheers,

Jayant

[vimipatel]

Yeah, sure… Put this code and try.