In react native I want to add a barcode scanner and take a picture on my app but I am running in to the following error:
invariant violation: requirenativecomponent: "rncamera" was not found
in the uimanager.
When barcode component view opens.
react-native-camera 3.3.0
react-native sdk-32 (expo)
Had the same problem with react-native-camera, rebuild(react-native run-android) fixed the problem. I have noticed that similar issues with other libs as well. I think linking sometimes doesn't properly take affect with just reloading
you will most likely have to eject to native code out of expo because any third party package that asks you to run the command "react-native link" as part of the setup process is strictly to be used with pure react native app. hope that helps
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I'm novice on React Native development, so I chosed to use Expo.
It seems very convinient, but I can't find a way to handle the case when native error occurs.
I wanted to use 'setNativeExceptionHandler' from "react-native-exception-handler", but I can't use it because it causes "Invariant Violation: Failed to call into JavaScript module method AppRegistry.runApplication(). Module has not been registered as callable." since it's native package and I can't link it to my project while I'm keeping it under Expo.
So I'm wondering,
Is there any solution or workaround to handle the native error without ejecting Expo?
If there's zero possibility, and if I keep the Expo development environment, what should I do? Is it possible to do like this? "complete everything under Expo -> eject -> insert native error handler -> EAS build" and repeat it every time(modify from the version before eject) when I update the app...?
Or, It's unnecessary because the developers can check the crash info in the App store or Play store?
Trying to build a MacOS app using react native
android and ios apps works fine
but when I try to run the macOS app shows me this.
Tried different solutions like deleting node modules clear cache et etc. Nothing helped.
I was working on a React Native Project with a team and I suddenly got this error. Not sure if it helps but I did get it after I used expo to install the BarCodeScanner API from expo. But this hasn't occurred before whenever I installed an Expo API, and even after rolling back the changes the problem has persisted. I've tried other methods like closing everything and turning it back on but it doesn't change anything and I've still gotten this issue.
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In my case this was the solution.
npm install react-native-reanimated react-native-gesture-handler react-native-screens react-native-safe-area-context #react-native-community/masked-view
This error appears after ejecting expo project to bareflow react native project v0.61.5.
I have tried finding implementation for AppState in project but could't find any.
I am running my project with react-native run-android after react-native start
I have a react native app built using Expo and everything was working fine until I had to npm install a package that broke everything. I've uninstalled the said package but the app doesn't seem to work any more. It shows the following invariant violation:
It shows an error Invariant Violation: ListView has been removed from React Native - however, I have not used ListView anywhere in my project. All my lists are through FlatList or VirtualisedList.
Additionally, I'm unable to deduce from the error info about the origin of this error. How do I fix this?
If you have the backup of the code please check the older version of React Native in package.json.
When you do npm install command your React Native version upgraded or may be some other packages.
So, you need to compare the packages with old package.json file. If you found that some packages are updated then you need to remove ^ e.g react-native: ^0.60.0 from package dependencies. This one is the only way to solve this problem.