title: Setting custom UINavigationBar images for left and right buttons
body: <p>This is what I have on my storyboard:<br>
  <img src="https://i.stack.imgur.com/CcLFk.png" alt="enter image description here"></p>
  
  <p>And I wanna change both buttons images. I have a 13x46 image but I'm having problems using it as the button's images. I've searched around for some code but I wasn't very successful with them.<br>
  Any ideas?</p>