title: UIProgressView unprogressed color
body: <p>I have a <code>UIProgressView</code> which I want to look like this image. I have set the progress color but I am not sure to set unprogressed color (white color in image).</p>
  
  <p><img src="https://i.stack.imgur.com/afZN2.png" alt="enter image description here">  </p>