如何将一个 DatePicker 添加到 swift 中的三个文本字段

Question

I need to add DatePicker to three textfields for that

I have created one datepicker like below

func addInputViewDatePicker(target: Any, selector: Selector) {

let screenWidth = UIScreen.main.bounds.width

//Add DatePicker as inputView
let datePicker = UIDatePicker(frame: CGRect(x: 0, y: 0, width: screenWidth, height: 216))
datePicker.datePickerMode = .date
self.inputView = datePicker

//Add Tool Bar as input AccessoryView
let toolBar = UIToolbar(frame: CGRect(x: 0, y: 0, width: screenWidth, height: 44))
let flexibleSpace = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
let cancelBarButton = UIBarButtonItem(title: "Cancel", style: .plain, target: self, action: #selector(cancelPressed))
let doneBarButton = UIBarButtonItem(title: "Done", style: .plain, target: target, action: selector)
toolBar.setItems([cancelBarButton, flexibleSpace, doneBarButton], animated: false)

self.inputAccessoryView = toolBar
}

@objc func cancelPressed() {
 self.resignFirstResponder()
}

and i am adding datepicker to three textfields in doneButtonPressed like below

    @objc func doneButtonPressed() {
    
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "yyyy-MM-dd"   
 
    if let  datePicker = self.fromDateTextfield.inputView as? UIDatePicker {
    
        self.fromDateTextfield.text = dateFormatter.string(from: datePicker.date)

    }
    if let  datePicker = self.toDateTextfield.inputView as? UIDatePicker {
      
        self.toDateTextfield.text = dateFormatter.string(from: datePicker.date)
    }
    if let  datePicker = self.lastbidDateTextfield.inputView as? UIDatePicker {
       
        self.lastbidDateTextfield.text = dateFormatter.string(from: datePicker.date)
    }
    
    self.lastbidDateTextfield.resignFirstResponder()
    self.toDateTextfield.resignFirstResponder()
    self.fromDateTextfield.resignFirstResponder()
 }

and in viewdidload:

override func viewDidLoad() {
    super.viewDidLoad()        
    fromDateTextfield.addInputViewDatePicker(target: self, selector: #selector(doneButtonPressed))
    toDateTextfield.addInputViewDatePicker(target: self, selector: #selector(doneButtonPressed))
    lastbidDateTextfield.addInputViewDatePicker(target: self, selector: #selector(doneButtonPressed))

 }

with above code if i add date in fromDateTextfield then in all three textfields same date is adding.. without going to that remaining two textfields

i want to add different dates to three textfields.. how to do that with above code..

if my above code is wrong please help me with new correct working code for three three textfields

Answer 1

Set a tag to every UIBarButtonItem from 0 to 2

func addInputViewDatePicker(target: Any, selector: Selector,tag:Int)
  .....
  doneBarButton.tag = tag
} 
@objc func doneButtonPressed(_ sender: UIBarButtonItem) {
  let dateFormatter = DateFormatter()
  dateFormatter.dateFormat = "yyyy-MM-dd"   
  let arr = [fromDateTextfield,toDateTextfield,lastbidDateTextfield]
  let current = arr[sender.tag]
  if let datePicker = current.inputView as? UIDatePicker {
    current.text = dateFormatter.string(from: datePicker.date)
    current.resignFirstResponder()
  }
}