simulator wont work

Hi developers.

I can't get the simulator to work, I have tried to reinstall Xcode,i know there isn't any errors, every time I put the code in then I says successful with the simulation, but nothing is happening, I have tried it with virtuel phone and my physical phone, and its the same thing.

i have linked to the code, hope your guys can help me.

https://github.com/hyperoslo/BarcodeScanner.git

simulator wont work
 
 
Q