iPhone: is there another way of yielding First Responder status?
<p>Problem: If you have a big form with a lot of text input fields with number pad, you would not want to tell every single text field something like</p>

<pre><code>[myTextField1 resignFirstResponder];
[myTextField2 resignFirstResponder];
</code></pre>

<p>instead, it would be great to just tell for example an invisible background button, that it is the First Responder as soon as the user tabs outside of any text field.</p>

<p>Like in JavaScript, when you give an element the focus(), all others lose it. How can I do that in UIKit?</p>
