Problem running react-native run-ios

[osolano]

Hello,

I've just tried a fresh clone of the project and followed the getting started instructions but am getting blocked by this error

Can't find variable Symbol

Tapping the first cell on this screenshot points to this area

var isEffectSymbol = Symbol('isEffect');

I performed the steps exactly as mentioned on Readme

[tino-junge]

Hi @osolano thanks for reporting this issue. I've just build a fresh clone of pepperoni without issues. I've used the following steps:

git clone [email protected]:futurice/pepperoni-app-kit.git
cd pepperoni-app-kit
yarn install
react-native run-ios

Could you specify your environment setup?

[osolano]

Sure, I'm on

react-native-cli: 2.0.1
react-native: 0.40.0
yarn v0.19.1
npm: 4.1.2
node: 7.5.0

[osolano]

I also just tried update react-native-cli and still have the same error.

react-native-cli: 2.0.1
react-native: 0.41.2

[tino-junge]

Your problem might be related to ES2015 Symbols (see here for more: facebook/react-native#4676). Someone was able to fix it for iOS to install a babel polyfill (https://babeljs.io/docs/usage/polyfill/). Let me know if it solves your issue.

[tino-junge]

Closing this now due to inactivity. Can reopen if the issue still occurs.

[Charlie-Hua]

Adding this line to the top of index.ios.js fixes it for me:

import 'es6-symbol/implement';

[FruitieX]

IIRC iOS < 9.0 does not implement Symbol in their JSC engine. Since #192 was merged, we are using a patched version of redux-loop which uses a Symbol polyfill when needed, which means the problems arising from missing Symbol will be fixed on all platforms regardless of version.

Please re-open if this is not the case.