title: shadowOffset + CornerRadius TableView
body: <p>I'm trying to put shadow and corner radius to a tableView. The <code>cornerRadius</code> works fine but the <code>shadowOffset</code> doesn't work: </p>
  
  <pre><code>CGRect shadowFrame = self.mainTableView.layer.bounds;
  CGPathRef shadowPath = [UIBezierPath bezierPathWithRect:shadowFrame].CGPath;
  self.mainTableView.layer.shadowPath = shadowPath;
  self.mainTableView.layer.shadowColor = [UIColor blackColor].CGColor;
  self.mainTableView.layer.shadowOffset = CGSizeMake(0, 1);
  self.mainTableView.layer.shadowOpacity = 4.0;
  self.mainTableView.layer.shadowRadius = 7.0;
  </code></pre>
  
  <p>Any idea?</p>