Multiple UIPickerView in the same UIView

Question

I\'m a complete beginner on iOS dev and I want to create a little iOS application. On this application, 3 UIPickerViews are supposed to display different data.

Answer 1

I would suggest to define a variable in controller then decide the value based on field selection

func textFieldDidBeginEditing(_ textField: UITextField) {
        if(textField == self.txtAge){
            **isAgeField=0**
            self.pickUp(txtAge)
        }else{
            **isAgeField=1**
            self.pickUpTimezone(timezonetxt)
        }
    }`

then you can add condition inside the picker view as below 

func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
       if isAgeField == 1 {
            return timeZoneList.count
        }else {
            return arrAge.count
        }
    }
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String?{
        if isAgeField == 1 {
            return timeZoneList[row]
        }else {
            return arrAge[row] as? String
        }


    }
    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        **if isAgeField == 1 {**
            timeZonepickerViewIndex = row
        }else  {
            selectedIndex = row
        }

    }