IOS app will fade into the background after launch

Question

My problem is as follows:

When I launch the application, the launch image appears within a few seconds, and the applications go into the background. I ran into this problem after upgrading to iOS 9.2.1

To solve this problem, I will delete my application and reinstall it, then it works fine, but lost all the important data, so this is not a suitable solution.

I am looking for a possible solution, but I can not find any help, so please help me solve this problem.

https://www.dropbox.com/s/gzdkm3tq4qfnovq/appcrash.mov?dl=0

This happens to the application at startup.

thanks

Answer 1

Do you use any application security software such as iXguard? I ran into a similar silent crash, and this was due to the fact that iXguard was confusing UIKit call someday.

One way to solve this problem is to add UIKit to the blacklist array.