title: what size should I use to put a background image on the navigation bar
body: <p>I'm looking on the internet and I'm told that the sizes should be 320x44 and 640 x 88, but I tried these and I have the following result:</p>
  
  <p><a href="https://i.stack.imgur.com/MFh7O.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/MFh7O.png" alt="enter image description here"></a></p>
  
  <p>The duplicate image to fill the entire space of the navigation bar, which are the correct sizes and as an achievement also that does not cover the state bar. Thank in objective C</p>