title: UISlider Thumbnail position offset
body: <p>I'm trying to implement a standard UISlider with a custom image.</p>
  
  <p>Currently it looks like so</p>
  
  <p><a href="https://i.stack.imgur.com/bLQ9o.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/bLQ9o.png" alt="enter image description here"></a></p>
  
  <p>But I need it to look like this</p>
  
  <p><a href="https://i.stack.imgur.com/lV0xZ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lV0xZ.png" alt="enter image description here"></a></p>
  
  <p>How do I offset the thumbnail up so only the tip barely touches the line?</p>