iOS: Make a text keyboard disappear. Used to show UIViewController as delegate for text field.

UsingUITextFieldDelegate.swift

//
// Setup for UITextFieldDelegate
//
// Note: Comments with this label are to explain semantics of iOS
//       Do not use comments like these in your projects

import UIKit

class ViewController: UIViewController, UITextFieldDelegate {

    // email address entry
    // Note: Must create text field in storyboard, and connect to this IBOutlet
    @IBOutlet weak var emailText: UITextField!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // Note: All delegate methods for the emailText will go through this object
        self.emailText.delegate = self
    }

    // Make the keyboard disappear once return is pressed
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        
        self.textField.resignFirstResponder()
        
        // Note: implements default return key behavior
        return true
    }
}

ztext Input Traits.png