title: How to draw vertical text in UILabel
body: <p>I'm currently working on drawing vertical Chinese text in a label. Here's what I am trying to achieve, albeit with Chinese Characters:</p>
  
  <p><img src="https://i.stack.imgur.com/A3cVy.png" alt="Express"></p>
  
  <p>I've been planning to draw each character, rotate each character 90 degrees to the left, then rotating the entire label via affine transformations to get the final result. However, it feels awfully complicated. Is there an easier way to draw the text without complicated CoreGraphics magic that I'm missing?</p>