Unable to switch screens after on_press of button in iOS simulator

Switching screens works fine on my Mac (just running my python main.py file), but when I try via iOS (iPhone and Simulator) I get stuck. Pressing button does not bring me to the second screen (drawing screen). Interestingly when moving and pressing on the mouse, the app print the coordinates as it should. So technically I am on the second screen, but I can see only the first one.


I don't get any error messages.


kivy: 1.10.1

python: 2.7.16

Xcode: 10.2.1

Mac Mojave


Code:

https://github.com/ksgfan/ApplePen/tree/master


Where schould I look for the solution?

Replies

got it, I had to change the FadeTransition to NoTransition in the .kv file. Still, any ideas, why FadeTransition does not work?