Missing Realm constructor or duplicated symbols

Goals

Using Realm normally

Expected Results

Actual Results

after install Realm and pod install, app will launch with error Missing Realm constructor. After research through github, I found that we should link libRealmReact.a to Link binary with libraries. But after linked, app throw error that 155 duplicate symbols for architecture x86_64.

Steps to Reproduce

react-native init exampleProject yarn add realm cd ios && pod install

Code Sample

import Realm from 'realm

Version of Realm and Tooling

• Realm JS SDK Version: 3.5.0
• Node or React Native: node 10.15.3 RN 0.61.2
• Client OS & Version: Mac OSX Catalina 10.15.1 Xcode 11.2.1
• Which debugger for React Native: None

[hauhuynh1208]

I found the solution:

1. create a new project with the same name as your existed project
2. removeios folder from existed project, and replace by the ios folder which is created from the new one.
3. remove node_modules and yarn.lock/package-lock.json
4. Add pod link if needed in Podfile
5. Make sure your ios folder dont includes Pods/ and Podfile.lock
6. yarn add realm
7. cd ios/ && pod install && cd …/
8. yarn start && yarn run ios

Hope my workaround could help who are got stuck on running existed project with realm 😃

[ruslanaplid]

“react-native”: “0.61.2”, “realm”: “^3.5.0”,

If run $ react-native run-ios - its ok

If run project in xCode to simmulator - Error: Missing Realm constructor. Did you run “pod install”? Please see https://realm.io/docs/react-native/latest/#missing-realm-constructor for troubleshooting

If remove folder ios/build and again run project in xCode - again Error “Missing Realm constructor” and folder ios/build is empty

UPD: Go to xCode menu Product -> Clean Build Folder - Yesssss YO!
Its work