UIDatePicker sample

datePicker.swift

//
//  ViewController.swift
//  demo
//
//  Created by Johnny Gu on 05/12/2016.
//  Copyright © 2016 Johnny Gu. All rights reserved.
//

import UIKit

class ViewController: UIViewController {
    
    @IBOutlet weak var startTextField: UITextField!
    @IBOutlet weak var endTextField: UITextField!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        let picker = UIDatePicker()
        picker.addTarget(self, action: #selector(pickerViewValueDidChanged), for: .valueChanged)
        startTextField.inputView = picker
        endTextField.inputView = picker
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        super.touchesBegan(touches, with: event)
        view.endEditing(true)
    }

    func pickerViewValueDidChanged(_ sender: UIDatePicker) {
        if startTextField.isEditing {
            startTextField.text = sender.date.description
        }else if endTextField.isEditing {
            endTextField.text = sender.date.description
        }
    }
}