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How to debug the preview in Xcode 13 or later

I can’t work out how to debug a preview in Xcode 13.

preview

Documentation for Xcode 11 and Xcode 12 has conflicting advice like

  • right click the run button and you’ll get a menu
  • control/command/option click run
  • long click the run

I’ve tried it all – and put breakpoints on almost every line of code in my preview / view / init functions – and however I hit run, it just… runs… – so I see the preview, but no breakpoints are hit – no print statements come out in the console – no cool expanded ui display appears – and no menus appear.

Any ideas?

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2

Answers


  1. 0

    It looks like Apple has chosen to remove the ability to debug Xcode Previews in Xcode 13 with no guidance as to if/when it will be brought back.

    Hi,
    The ability to use a debugger for previews has unfortunately been removed. > As you pointed out, the workaround is to run the app in the simulator.
    Sorry for any inconvenience caused!

    Posted 1 month ago by Frameworks Engineer 

    https://developer.apple.com/forums/thread/683773

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  2. 0

    You can attach the Debugger to the Preview Process like explained here

    Deprecations
    Xcode 13 no longer includes a menu item in the Previews
    canvas for debugging a preview. Instead, use the Debug > Attach to
    Process menu item to attach the debugger to your previewed app.
    (73981969)

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