title: Custom iOS UIDatepicker using UIAppearance
body: <p><a href="http://www.uniqlo.com/wakeup/en/pc/" rel="noreferrer">UNIQLO's new alarm app</a> has a custom <code>UIDatePicker</code>:</p>
  
  <p><img src="https://i.stack.imgur.com/OWL5W.png" alt="custom"></p>
  
  <p>And I want to create my own custom <code>UIDatePicker</code>.</p>
  
  <p>I tried to change the appearance of the DatePicker, but looking for <code>UI_APPEARANCE_SELECTOR</code> in the <code>UIDatePicker</code> returns <em>nothing</em>.</p>
  
  <p>Meaning that its not possible to change any values, as per the docs:</p>
  
  <blockquote>
    <p><a href="https://developer.apple.com/documentation/uikit/uiappearance" rel="noreferrer">To support appearance customization, a class must conform to the UIAppearanceContainer protocol and relevant accessor methods must be marked with UI_APPEARANCE_SELECTOR.</a></p>
  </blockquote>
  
  <p>How can change my <code>UIDatePicker</code>'s appearance?</p>