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

In my experience, you should:

1. Prevent Swift playground refresh, by holding: the ► arrow at the bottom left part of the Playground and selecting "Manually Run"
2. Quit Xcode
3. Restart Xcode

It works very well.