Can't dismiss keyboard, UITextField delegate being called OK - swift

Question

This problem has been driving me crazy. It seems no matter what I try I cannot get the keyboard to hide once it is shown in my simple Swift program.
It does not work when I resignFirstResponder() in textFieldShouldReturn nor does it work when handing a background touch by calling endEditing() from touchesBegan(...). I can see these respective methods are all being called when I set debugger break points to them, so the delegate is properly set and being called as expected.
Here are the specific steps I took:
Create a new single-view application Swift project
Drag a UITextField onto the view, wire up the IBOutlet, and set the ViewController up as UITextFieldDelegate.
Run in iPhone 6 Simulator or on an iPhone 6 device
Once the keyboard is presented, it is never dismissed!!
I am out of ideas - what am I missing???
Here is the entire contents of my ViewController:
import UIKit
class ViewController: UIViewController, UITextFieldDelegate {
#IBOutlet weak var myTextField: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
myTextField.delegate = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
self.view.endEditing(true)
}
func textFieldDidBeginEditing(textField: UITextField!) {
return
}
func textFieldShouldEndEditing(textField: UITextField!) -> Bool {
return false
}
func textFieldShouldReturn(textField: UITextField!) -> Bool {
textField.resignFirstResponder()
return true
}
}

Answer 1

You are returning 'false' from 'textFieldShouldEndEditing'. The following is an excerpt from the 'UITextFieldDelegate' documentation:
Return Value
YES if editing should stop; otherwise, NO if the editing session
should continue
Discussion
This method is called when the text field is asked to resign the first
responder status. This might occur when your application asks the text
field to resign focus or when the user tries to change the editing
focus to another control. Before the focus actually changes, however,
the text field calls this method to give your delegate a chance to
decide whether it should.
Normally, you would return YES from this method to allow the text
field to resign the first responder status. You might return NO,
however, in cases where your delegate detects invalid contents in the
text field. By returning NO, you could prevent the user from switching
to another control until the text field contained a valid value.
Source
So, either return 'true' from it or remove the method completely, unless you really need to do something useful inside it. 'textFieldDidBeginEditing'and 'touchesBegan' should also probably be removed. I'm really surprised that the same code worked in Objective-C.