I am wondering how to use slicing in xCassets to minimize the number of resources for UINavigationBar.
I set up a normal one (320x64) and a retina one (640x128) with a logo in the very center and a solid background color. With appropriate stretching, this two ones should be enough to fit also iPad width, iOS6 and iOS7 variations, etc.
I would like the center logo not to be stretchable and everything around to be so in order for the image to work for non iOS7 nav bar (320x44 & 640x88), for iPad (width 768 px and 1536 for retina).
Using the slicing option, I tried to define different window ... any one helped me to achieve my goals and I think this is not very well documented.