title: When subclassing UIToolBar to have a custom background the bottom half of toolbar is black?
body: <p>I'm subclassing UIToolBar, here is how I override the <code>drawRect</code> method of UIToolBar:</p>
  
  <pre><code>- (void)drawRect:(CGRect)rect
  {
      UIImage *backgroundImage = [UIImage imageNamed:@"UIToolBar_Background.png"];
      [backgroundImage drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
  }
  </code></pre>
  
  <p>The app uses a UINavigationController paradigm initialized with <code>initWithNavigationBarClass</code> method. </p>
  
  <p>The issue is that the bottom half of toolbar is black? The UIToolBar_Background.png is 44 pixels height (or 88 for retina). It should not have it's bottom half black. </p>