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xcodesafarisafari-extension

How to debug safari app extension on Xcode when pid could not be attached

I started an empty safari app extension in Xcode, I didn't change any code from the boilerplate.
When I run this new and empty extension and choose safari to open it, something went wrong:


Could not attach to pid : “13069”
Domain: IDEDebugSessionErrorDomain
Code: 3
Failure Reason: Error 1
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Error 1
Domain: IDEDebugSessionErrorDomain
Code: 3
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I am totally new to xcode and safari extension, hope someone could help.

Solution

  • Just clean the build folder with Cmd + Shift + K and rerun the extension project, then it works.
    But still, don't know what caused this problem.