ios - Objective C - Iphone. How can I show the numeric keyboard by default? -

I'm trying the following with a fortune when the user clicks on the UI field, then let me see the numerical view of the keyboard view Must have to change automatically, is it possible? thank you in advanced.

Protocol (which is in conformity with UITextField ) is one Keyboard type type property UIKeyboardType .

  myTextField.keyboardType = UIKeyboardTypeNumberPad;