Click UIButton To Show UIPickerView and Select ID on Button Title : Swift - ios

Question

MY Scenario, I am trying to create button click to open UIPickerView and selecte picker data to show on button title using swift. Here, Toolbar also I would like to add into the pickerview controller.
let button = UIButton(type: .custom)
button.setTitle("",for: .normal)
button.frame = CGRect(x: CGFloat(amount_textfield.frame.size.width - 9), y: CGFloat(5), width: CGFloat(9), height: CGFloat(20))
button.addTarget(self, action: #selector(self.refresh), for: .touchUpInside)
amount_textfield.leftView = button
amount_textfield.leftViewMode = .always
#IBAction func refresh(_ sender: Any) {
// Here, I need to execute picker view
}

Answer 1

There are few steps that you have to follow:
Create initially hidden UIPickerView and set its delegate and dataSource
#IBOutlet weak var pickerView: UIPickerView!
override func viewDidLoad() {
super.viewDidLoad()
pickerView.delegate = self
pickerView.dataSource = self
}
Have data source array which you use for this picker view
class ViewController: UIViewController {
var array = [String]()
}
extension ViewController: UIPickerViewDelegate, UIPickerViewDataSource {
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return array.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return array[row]
}
}
Unhide your picker view when button is pressed
pickerView.isHidden = false
Integrate picker view's delegate method pickerView(_:didSelectRow:inComponent:). When row is selected, set title of button as element from your data source array at index as selected row
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
button.setTitle(array[row], for: .normal)
}
Optional: Hide picker view
pickerView.isHidden = true