Black screen when starting app in the simulator

I have been coding an app in Xcode and up until now it has run fine on the simulator.
Now whenever I run on the simulator, I get shown a blank white screen, then blank black screen. Does anyone know what is wrong or how I could fix it. I have included images for reference.

Hey @joshberrington,

Perhaps you might want to check if your view controller’s custom class is set properly to your .swift class. It is under the identity inspector.