title: Animate a graphic based timer and progress bar in iOS
body: <p><img src="https://i.stack.imgur.com/rikQ4.png" alt="enter image description here"></p>
  
  <p>Please see the above image, which shows a graphic of a timer, as well as a graphic of a progress bar, that I'd like to animate as I update the values of each. What's the best way to go about animating these as the values get updated? Also, the timer and progress bar are independent of each other.</p>
  
  <p>Thanks.</p>