I have an app with a primary view that has a UITabBarController with 5 tabs. Each tab is a UINavigationController.
In interface builder, I’m customizing the background of each page by dragging a UIImageView and setting it fullscreen. The image I’m setting to the view is 640×960. I am setting it to be Aspect Fill.
However, what I’ve noticed is that it is not where I would expect it to be. When navigating between by tabs, the image seems to be shifted down from where it should be.
Also, when pushing a new view to the navigation controller, the background of this new view isn’t offset in the same way as the tabbar one, and it is also slightly dimmed.
How can I set my UIImageViews on each page to be aspect correct and fill the screen 1:1? Also, how does one disable the dimming when pushing a view to the navigation controller?
Thanks for any tips, and apologies if this is covered in another thread, I couldn’t find an answer searching the site.
Assuming that you are using the IB to setup your views, you should select navbar/tabbar options to reflect what will be on the actual page. That should place your image correctly. I would also recommend that you make both a low res and hi res version of your background images — 320×480 and 640×960. Of course, your size may need to be adjusted (reduced) for the navbar and/or tabbar which will leave less than 960 px of vertical height — probably more like 920px if you are in portrait mode. Then you add @2x to the base name of the hi res version, this would account for older iPhone screens.
Once you have the image placed correctly, resizing should be unnecessary. You can have the image automatically resize width and height using the little arrows on the layout page — that’s a bit hard to describe. It can also be done in code — if you still need that I can provide a sample.