UI With Text Field Checklist

Keyboard Return Key

    - Set UITextField delegate in the main storyboard

    - implement the protocol UITextFieldDelegate or UITextViewDelegate in the view controller

    - override the function 

    func textFieldShouldReturn(textField: UITextField) -> Bool

 Dismiss Keyboard on Background Tap
    - Change the view class from UIView to UIControl
    - Allow User Interaction should be checked
    - Create an action touch down on the UIControl
    - On the action for touch down, invoke:

    @IBAction func backgroundTouchDown(sender: AnyObject) {

        view.endEditing(true)

    }