How to hide the keyboard when I press return key in a UITextField?

Question

Clicking in a textfield makes the keyboard appear. How do I hide it when the user presses the return key?

Answer 1

You can connect "Primary Action Triggered" (right click on UITextField) with an IBAction and you can resign first responder (without delegation). Example (Swift 4):

@IBAction func textFieldPrimaryAction(_ sender: UITextField) {
    sender.resignFirstResponder()
    ...
}