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React Native app crashing with 'Invariant Violation: requireNativeComponent: 'myComponentName' was not found in the UIManager' error

πŸ‘€ Views: 0 πŸ’¬ Answers: 1 πŸ“… Created: 2025-07-08
react-native native-modules ui-manager invariant-violation JavaScript

I'm migrating some code and I can't seem to get I've been banging my head against this for hours. I'm working on a React Native app (v0.64.0) and I've created a custom native module that needs to render a component... However, when I try to display this component, the app crashes with the error message: `Invariant Violation: requireNativeComponent: 'MyComponent' was not found in the UIManager`. I have double-checked that the native code for the component is correctly linked in the Android and iOS projects, and I ran `react-native link`. I've also tried cleaning the build with `cd android && ./gradlew clean` and restarting the packager. Here’s my native module setup for reference: ```javascript // MyComponent.js import { requireNativeComponent } from 'react-native'; const MyComponent = requireNativeComponent('MyComponent'); export default MyComponent; ``` In my native code (Android), the component is registered like this: ```java package com.myapp; import com.facebook.react.uimanager.SimpleViewManager; import com.facebook.react.uimanager.ThemedReactContext; public class MyComponentManager extends SimpleViewManager<View> { public static final String REACT_CLASS = "MyComponent"; @Override public String getName() { return REACT_CLASS; } @Override protected View createViewInstance(ThemedReactContext reactContext) { return new View(reactContext); } } ``` I’ve confirmed that the package is included in the ReactPackage, but the error persists. Is there something I might be missing in the registration process, or do I need to do something specific to ensure the component is available to the UIManager? What am I doing wrong? I'm working on a service that needs to handle this. Is there a better approach? What are your experiences with this? I've been using Javascript for about a year now. What are your experiences with this?