title: UIWebView shows a black screen with no content
body: <p>I've created a UIWebView from the IB and subclassed it to my needs. Somewhere inside my app I'm using the following code:</p>
  
  <pre><code>_mainWebView = nil;
  _mainWebView = [[MyWebView alloc] initWithFrame:CGRectMake(0,0,320,460)];
  _mainWebView.delegate = self;
  NSURL *url = [NSURL URLWithString:@"http://www.google.com"];
  NSURLRequest *request = [NSURLRequest requestWithURL:url];
  [_mainWebView loadRequest:request]; 
  NSLog(@"WebView: %@", _mainWebView); //-&gt;&gt; WebView: &lt;MyWebView: 0x15403000; baseClass = UIWebView; frame = (0 0; 320 548); layer = &lt;CALayer: 0x1544dac0&gt;&gt;
  </code></pre>
  
  <p>Which gives me a black screen with no content.</p>