Xcode Error when trying to build a React Native project on simulator or device

Question

I've had some issues with permissions on the original react native app directory and decided to store my .js files in a separate folder as a backup and recreate the project in the same directory from scratch, hoping to solve the problem.

The new react native project seems to have been created successfully as I was able to build and test in the simulator the basic app. I then re-imported my backed up .js files and linked a particular library i'm using in xcode as well. When I try to build the project from xcode now, to my iphone, I receive the error below:

Undefined symbols for architecture armv7:
"_OBJC_CLASS_$_RCTEventEmitter", referenced from:
  _OBJC_CLASS_$_RCTKeyboardObserver in libReact.a(RCTKeyboardObserver.o)
"_OBJC_METACLASS_$_RCTEventEmitter", referenced from:
  _OBJC_METACLASS_$_RCTKeyboardObserver in libReact.a(RCTKeyboardObserver.o)
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)

I looked around as well and found out some references mentioning that I might be missing a .m file but that seems a bit strange to me as I created this project from scratch, but could it be that things might have changed when I imported my .js files?

I was also told to upgrade to react native 0.26 - the upgrade happened but the issue is still there.

This app used to work before so I can't really find from where the issue is coming from.

Any help will be greatly appreciated.

Thanks!

Andreyco · Accepted Answer · 2016-06-16 22:27:50Z

6

I did fix this by Cleaning the Project from "Product > Clean" (or Shift+CMD+K)

edited Jun 16, 2016 at 22:27

answered Jun 16, 2016 at 14:51

Andreyco

22.9k5 gold badges63 silver badges66 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Emre K. Over a year ago

2 upvotes on the answer and 0 upvotes on the question. Never understand that.

pol6880 · Accepted Answer · 2016-06-02 17:19:55Z

0

I eventually ended up re-initiating the whole application from scratch and placed the .js files from the backup I had. Seems to all be working fine now.

answered Jun 2, 2016 at 17:19

pol6880

1513 silver badges10 bronze badges

Comments

feroult · Accepted Answer · 2016-06-11 04:21:19Z

0

I was stuck with the same problem after upgrading to react-native 0.27.1.

After I've cleared my ./ios/build folder, the problem was solved.

edited Jun 11, 2016 at 4:21

answered Jun 9, 2016 at 13:05

feroult

4935 silver badges12 bronze badges

1 Comment

pol6880 Over a year ago

Thanks for sharing!

Collectives™ on Stack Overflow

Xcode Error when trying to build a React Native project on simulator or device

3 Answers 3

1 Comment

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related