Tom Bednarczyk Tom Bednarczyk - 1 year ago 586
Swift Question

Swift 3 | Xcode 8 datePicker update UItextField

This code allows you to update a

for Xcode 7 but when I try to implement it in Xcode 8 and Swift 3, the app crashes and throws a SIGABRT error in the AppDelegate.swift file. I've check all of my @IBs and I don't have any miscellaneous connections that need to be deleted. Any guidance would be greatly appreciated.

import UIKit

class ViewController: UIViewController, UITextFieldDelegate {
@IBOutlet var eventStartText: UITextField!

override func viewDidLoad() {

eventStartText.delegate = self

// Do any additional setup after loading the view.

override func didReceiveMemoryWarning() {
// Dispose of any resources that can be recreated.

// MARK: TextField Delegate
func datePickerChanged(sender: UIDatePicker) {
let formatter = DateFormatter()
formatter.dateStyle = .full
eventStartText.text = formatter.string(from:

print("Try this at home")

func textFieldDidBeginEditing(_ textField: UITextField) {
let datePicker = UIDatePicker()
textField.inputView = datePicker
datePicker.addTarget(self, action: (Selector(("datePickerChanged:"))), for: .valueChanged)

print("This Worked")

func textFieldShouldReturn(_ textField: UITextField) -> Bool {
return true

// MARK: Helper Methods
func closekeyboard() {

// MARK: Touch Events
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {

// MARK: - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.

Answer Source

The issue is with the selector syntax, from Swift 3 you need to specify the first parameter name inside selector, so change your selector syntax like this.

datePicker.addTarget(self, action: #selector(datePickerChanged(sender:)), for: .valueChanged)
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