title: Return Inputs to UITextfield with custom inputView
body: <p>i created a UITextField and a custom View.
  after that i added this custom view as "inputView" to my UITextField.</p>
  
  <pre><code> amountKeyboardViewController *amountKeyboard = [[amountKeyboardViewController alloc] initWithNibName:@"amountKeyboardViewController" bundle:nil];
  
  amountTextField.inputView = amountKeyboard.view;
  
  [amountTextField becomeFirstResponder];
  </code></pre>
  
  <p>this works quite fine. but can i fill my "amountTextField" with the input clicked in my custom View (UIButtons)?</p>
  
  <p>thanks for some hints !</p>