How to fix property of GADBannerView so a request can be loaded
<p>I am getting this error:</p>

<pre><code>2016-05-11 17:07:43.496 Inspire[2265:1045224] &lt;Google&gt; 
  You must set the        rootViewController property of 
  &lt;GADBannerView: 0x136586cb0; frame = (47 0; 320 50); 
  clipsToBounds = YES; autoresize = RM+BM; layer = 
  &lt;CALayer: 0x1365876b0&gt;&gt; before loading a request.
</code></pre>

<p>my <code>GADBannerView</code> does not appear at all. </p>

<p>How do I fix this problem to make it load?</p>

<p>Thanks.</p>