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iOS Build a Simple iPhone App with Swift Creating a Data Model Creating a Data Collection

Marcus Avena
Marcus Avena
542 Points

Having trouble running the simulator, what to do?

When I run the simulator, instead of the digital iphone screen showing the functioning app, I get a black screen that is slightly bigger and squarer. When I close it, I receive a message that says: (Domain = NSMachErrorDomain, Code = -308)

1 Answer

Ricky Sparks
Ricky Sparks
22,249 Points

You probably are running two different instances of the iOS Simulator.

1.Clean the project. (CMD+SHIFT+K) 2.Quit Xcode. 3.Quit all instances of iOS Simulator. 4.Restart the computer. 5.Log in. 6.Make sure no instances of iOS Simulator are running (I had a wrong version set to Open At Login) 7.Run your project, and let Xcode open the right Simulator.