Yesterday, I found that iOS app exported by Unity with Vuforia crashed as soon as launched. This is critical problem because I cannot see the result totally! And I found this page This page described the simple process how to solve it.
Setting orientation
In exported project, Info.plist should be rewritten. You add new item named UIInterfaceOrientation and set as you like.
That’s all your Xcode project might not crash. Try it.
