title: How do I add UIControls to a UIScrollView contentView?
body: <p>I want to add UIControls to a UIScrollView, eg.</p>
  
  <pre><code>UIControl *couponView = [[UIControl alloc] initWithFrame:CGRectMake(drawX,drawY,couponWidth,couponHeight)];
  couponView.backgroundColor = [UIColor redColor];    
  
  [[scrollView contentView] addSubview:couponView]; //may not respond
      [scrollview.contentView addSubview:couponView]; //not a member
  </code></pre>
  
  <p>I also want to set the frame of the contentView based on how many UIControls I'm adding. I'm thinking I'll set the frame far in the Y direction off screen, and the UIScrollView will scroll the off-screen parts into visibility whenever the user scrolls.</p>
  
  <p>I didn't see a contentView property in UIScrollView.. how can I access the contentView?</p>