title: An easy way to draw a circle using CAShapeLayer
body: <p>In questions like <a href="https://stackoverflow.com/questions/24316705/how-to-draw-a-smooth-circle-with-cashapelayer-and-uibezierpath">How to draw a smooth circle...</a>, <a href="https://stackoverflow.com/questions/24954735/xcode-draw-circle-around-centre">...Draw Circle...</a> and <a href="https://stackoverflow.com/questions/17038017/ios-draw-filled-circles">...draw filled Circles</a> the question and answer is very broad, contains lots of unnecessary steps and the methods used isn't always the easiest to re-create or manage.</p>
  
  <p>What is an easy way to draw a circle and add it to my <code>UIView</code>?</p>