Xcode playground gets stuck on 'Running playground' or 'Launching simulator' and won't run the code, what to do?

Question

Every time I create a new playground in order to test some code, Xcode gets stuck and won\'t run the code. It simply presents \'Running playground\' or \'Launching simulator

Answer 1

One last tip that works for me: Make sure no iOS simulator is running. They conflict with each other.

Answer 2

Make sure you kill xcode in the activity monitor before eventually killing com.apple.CoreSimulator.CoreSimulatorService process in the activity monitor. I tried killing the process a number of times and I realized if xcode is still running in the background activity then the com.apple.CoreSimulator.CoreSimulatorService process would pop up again even when you just killed it.

Answer 3

In my case, Xcode 8.3.2, it works when I try as steps below:

1. File -> Close "Name.playground"
2. File -> Close Playground
3. Quit Xcode
4. Re-open Xcode

Answer 4

I deleted derived data and clean build folder. This works for me. I was facing with Xcode 11.2.1 and Xcode 10.1 on same machine.