Why does the application I wrote stop working on the iPhone after a long launch?

Question

iOS

Good day, when developing the application, I encountered such a problem (more precisely, when testing). It turned out that a few days after launching the application on the iPhone, the following happens, it opens, but when you enter the main menu, it immediately collapses, while in the manager of running applications it is displayed as running.

Answer 1

You may not have a developer account. Uninstall and reinstall the app.