title: hide iPad keyboard with "hide button" in lower right
body: <p>i want to hide iPad virtual keyboard when user presses "hide keyboard button" in the lower right corner. i've set up my viewcontroller as textFieldView's delegate, but no <code>textFieldShouldReturn</code> event doesnt called when i press that button. i also set my viewcontroller as an observer for <code>UIKeyboardWillHideNotification</code> - the same effect, no notification generated.
  please, give a clue! i've parsed half of network and haven't found any solutions for that!</p>