Use Interface Builder to delegate actions to fields that accept Delegation. For instance, if you're trying to setup a field to resign being the first responder in a controller:
class SomeController < UIViewController def textFieldShouldReturn(textField) titleField.resignFirstResponder true end end
First CTRL drag the text field to the View controller and select delegate. Now you can respond to all delegate-able calls sent to that button.
Alternately you can set the field's delegate to 'self' from the controller to accomplish the same thing in the controller's #viewDidLoad action
class SomeController < UIViewController def viewDidLoad textField.delegate = self end end