Playground can't find symbols in swift private frameworks

I have a set of playgrounds that I'm using with a with a private (Swift) framework that is hosted, alongside my app targets, inside a workspace. The playground imports the private framework, and the editor is at least aware of the framework's code.


However, when I attempt to execute the playground, I get no output except the following error in the console:


Playground execution failed: error: Couldn't lookup symbols:

__TF.......

__TW.......

__TZ.......


The mangled-symbol lines are obvioiusly truncated to protect the innocent, but these are all symbols that are in the framework and are referenced in the playground.


I've verified that:

  • The framework is in the same workspace as my playground
  • It's being used by at least one app target (it's actually being used by two separate app targets).
  • The framework is being imported in the playground (interestingly, when the playground first loads, there's a "Cannot find framework ..." tooltip error, but that goes away after a couple of seconds.
  • The editor is aware of all symbols, and I can control-click through to any of them.


While it's been a while since I used the playground, it previously worked with XCode6. I'll appreciate any tips.

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jrmiddle
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I had something similar going on and the solution made me feel pretty dumb: I hadn't built the framework that I was using in the playground. Now I thought I did, or that the other targets I built would implicitly build the framework for use in the playground, but that wasn't the case. When I explicitly selected the framework target and built it, my problems went away. Hopefully this helps you.

Posted by
FluxCapacitor
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Thanks, but no dice—still seeing the same issues on XCode 7.1 GM.

Posted by
jrmiddle
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This really sounds like the playground's not getting built for some reason. Perhaps it's not getting built for the simulator?


If you can, please file a bug report and attach the entire workspace.

Posted by
SevenTenEleven
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Same error here ("Couldn't lookup symbols"). Followed all of Apple's guidelines—pre-compiled framework, active scheme, common workspace—no luck. Anyone actually found a definitive solution?


btw, the framework and playground are OS X only, at this point, not iOS.

Posted by
jbmaxwell
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Having this problem in Xcode 12 using a playground that used to work in Xcode 11 and 10. Trying to import a class in a framework from the same workspace. Playground compiles fine but then we get "error: Couldn't lookup symbols". Why can't Apple make Playgrounds "just work"? How about giving us a way to explicitly link certain frameworks to the playground so it never has this problem...?
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O_G
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