title: How to change color or navigation bar in launchscreen.storyboard?
body: <p>So I am trying to use <code>launchscreen.storyboard</code> for my launch screen and I embedded in a navigation bar and a tab bar. </p>
  
  <p>Now my app's navigation bar color and tab bar color is not the default color. </p>
  
  <p>Is there anyway for me to change the launch screen's navigation and tab colors? ( there is no way to add in programmatically since luanchscreen.storyboard is not supposed to have class, right?)</p>
  
  <p>or do I have to use images instead?</p>