If that still doesn’t work, then maybe you have accidentally set some breakpoints which is stopping the app execution. Secondly, I would reset the simulator like I mentioned above and try to run my app again. Sometimes it can take up to 15 seconds to launch your app initially.

If you run your app and the iOS simulator is showing a black or white screen, I would first wait a little while. My simulator screen is black or white when the app runs You can also hit command + 1-3 on your keyboard as shortcut keys to control the zoom level of your simulator. By default, the zoom level is “Physical Size.” The frame or bezel on the simulator also differs from level to level so if you don’t see an iPhone bezel on your simulator, try changing your zoom level to either “Physical Size,” “Point Accurate,” or “Pixel Accurate” as shown in the screenshot below.

If your iPhone simulator doesn’t look like the one you see me using in my videos, it’s because your iOS simulator is at a different zoom level. Xcode Simulator Errors My iPhone simulator looks different?

– Can’t drag UIElements onto my Storyboardġ. – Xcode complains that a method of some class doesn’t exist – Unexpectedly found nil while unwrapping an optional value – This class is not key value coding-compliant for the key… – Finding the error message after a crash – My simulator screen is black when the app runs This handy reference guide will show you what the common causes for these errors are and give you steps to fix them! Updated on Jby David Ruvinskiy and Chris ChingĪre you getting strange error messages like “Thread 1: signal sigabrt” or “Use of unresolved identifier”?

Reinstall xcode