UiPickerView Implementation in iOS Swift 3

Initially, you have to add the PickerView delegate and textField to the class.

Code:

class ViewController: UIViewController,UIPickerViewDelegate, UIPickerViewDataSource,UITextFieldDelegate{

}

Declare the picker in globally.


var Picker: UIPickerView!

var array:NSMutableArray!

In ViewDidLoad add the following code

        Picker = UIPickerView()

        Picker.delegate = self

Set the text field inputView as the picker.

        textfield.inputView = Picker

Then Implement the PickerView delegate methods.

    // MARK: - Picker view data source

    func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {

        return 1

    }

    

    func numberOfRows(inComponent component: Int) -> Int{

        return array.count

    }

    

    func pickerView(_ pickerView: UIPickerView,

                    titleForRow row: Int,

                    forComponent component: Int) -> String?{

        return array[row]

    }

    

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {

        textfield.text = array[row]

    }

    //    MARK: - TextField Delegate Methods

    func textFieldDidEndEditing(_ textField: UITextField) {

        textfield.text = array[row]

    }