Showing Recent Issues clang: error: linker command failed with exit code 1 (use -v to see invocation)?

问题

I am new to IOS app development..I trying to integrate firebase firestore..After doing all add commands..I build using command+B then I am getting below errors...how to solve

Below is my error

Below is my project structure

回答1:

Try to open project.xcworkspace instead of project.xcodeproj.

Note: Press Command + Q to exit xcode. And open yourfile.xcworkspace.

回答2:

Clean your project and build again solve your problem.

Product - Clean

Then also, if error is still there delete you derived data.

Library/Developer/Xcode/ Derived data

来源：https://stackoverflow.com/questions/52051431/showing-recent-issues-clang-error-linker-command-failed-with-exit-code-1-use