React Native 0.79中iOS端WebView显示白屏的问题排查与解决方案咨询

Hey there, let's dig into this iOS WebView white screen issue you're facing with RN 0.79 and react-native-webview 13.13.5. Since it works fine on Android and runs without problems on iOS when switching back to the Classic Architecture, the issue is almost certainly tied to your New Architecture setup. Here are some targeted steps to troubleshoot and fix it:

• Verify WebView's New Architecture compatibility
  First, confirm if react-native-webview 13.13.5 fully supports RN 0.79's New Architecture. Some libraries require extra configuration to work with the new architecture. Check the version's release notes or look for New Architecture-related files in the WebView package (like WebViewFabricComponent.js or WebViewTurboModule.mm) to ensure they exist and are properly structured.

• Fix ReactAppDependencyProvider configuration
  In your iOS project's AppDelegate.mm, make sure the ReactAppDependencyProvider correctly registers WebView's TurboModule and Fabric components. Add code similar to this:

  #import <RNCWebView/RNCWebViewModule.h>
  #import <RNCWebView/RNCWebViewComponent.h>
  
  - (NSArray<id<RCTTurboModule>> *)extraTurboModules {
    return @[
      [[RNCWebViewModule alloc] initWithBridge:self.bridge],
    ];
  }
  
  - (NSArray<id<RCTComponentDataProvider>> *)extraComponentDataProviders {
    return @[
      [RNCWebViewComponentDataProvider new],
    ];
  }
  

  If your project uses Swift, adjust the corresponding configuration in AppDelegate.swift accordingly.

• Clear iOS build caches
  Cached build files often cause New Architecture configurations to fail to take effect. Do the following:

  • Close Xcode completely
  • Delete the ios/build folder
  • Run pod deintegrate followed by pod install
  • Reopen Xcode, clean the build folder (Cmd+Shift+K), then rebuild the project

• Debug WebView loading logic
  Make sure your WebView component doesn't have logic issues specific to iOS's New Architecture. Try loading a simple public URL like https://example.com instead of your local page to see if the white screen persists. Also, listen to WebView's error and load events to get detailed logs:

  <WebView
    source={{ uri: 'https://example.com' }}
    onError={(syntheticEvent) => {
      const { nativeEvent } = syntheticEvent;
      console.warn('WebView error details:', nativeEvent);
    }}
    onLoadStart={() => console.log('WebView started loading')}
    onLoadEnd={() => console.log('WebView finished loading')}
  />
  

  These logs will help you tell if the issue is a loading failure or a rendering problem.

• Double-check Info.plist permissions
  You mentioned adding permissions, but let's confirm the ATS (App Transport Security) settings. If you're loading HTTP links, ensure NSAppTransportSecurity > NSAllowsArbitraryLoads is set to YES. For HTTPS links, verify the target website's SSL certificate is valid. For a more secure setup, you can use NSAllowsArbitraryLoadsInWebContent instead to only allow non-HTTPS requests for the WebView.

• Try upgrading react-native-webview
  The current version might have compatibility bugs with RN 0.79's New Architecture. Check if there's a newer version (like 13.14.x or later) available, upgrade it, and test again to see if the white screen issue is resolved.

备注：内容来源于stack exchange，提问作者Runali Ambavkar