基于React Native + Expo开发的iOS应用因WebView违反App Tracking Transparency规范遭App Store拒审，寻求解决方案

Hey there, let’s work through this App Store rejection headache together—this is a super common gotcha when using WebViews with ATT requirements, so let’s break down why your first fix didn’t work and how the incognito mode approach can help (plus extra steps to lock it in).

Why Disabling Third-Party Cookies Didn’t Cut It #

Apple’s rejection notice calls out that tracking is still happening even after the user opts out. The problem with just disabling third-party cookies is that many websites use first-party cookies for tracking too—things like session identifiers, user behavior markers, or ad-related tokens set directly by the embedded site. Since you can’t control the site’s code, blocking only third-party cookies isn’t enough to stop all tracking-related data collection.

Will WebView Incognito Mode Work? #

Absolutely—this is likely the most reliable fix you can implement without modifying the embedded website. When you enable incognito mode for the WebView:

• No cookies (first or third-party) are persisted between sessions
• No browsing data (cache, local storage, session storage) is saved
• The WebView runs in a completely isolated context, so there’s no way for the site to track the user across app launches or other sessions

This directly addresses Apple’s concern: after the user opts out of tracking, no data is being collected or stored for tracking purposes.

Step-by-Step Implementation #

Here’s how to set this up properly in your Expo/React Native app:

1. Ensure your ATT flow runs BEFORE loading the WebView
   Don’t load the WebView until the user has made their tracking choice. If the WebView loads before the permission prompt, it might already set tracking cookies before you can block them. Example:

   import { useState, useEffect } from 'react';
   import { WebView } from 'expo-webview';
   import { requestTrackingPermissionsAsync } from 'expo-tracking-transparency';
   
   export default function App() {
     const [trackingAllowed, setTrackingAllowed] = useState(null);
   
     useEffect(() => {
       const requestPermission = async () => {
         const { status } = await requestTrackingPermissionsAsync();
         setTrackingAllowed(status === 'granted');
       };
       requestPermission();
     }, []);
   
     if (trackingAllowed === null) {
       return <Text>Loading...</Text>; // Show a loader while waiting for permission
     }
   
     return (
       <WebView
         source={{ uri: 'YOUR_EMBEDDED_SITE_URL' }}
         incognito={!trackingAllowed} // Enable incognito only when tracking is denied
         cacheEnabled={trackingAllowed} // Disable cache when incognito is on
         domStorageEnabled={trackingAllowed} // Disable local storage if not needed
       />
     );
   }
   

2. Add extra privacy safeguards
   Alongside incognito, tweak these WebView props to minimize data collection when tracking is denied:

   • cacheEnabled={false}: Prevents storing cached content that could be used for tracking
   • domStorageEnabled={false}: Disables local storage (only use if the embedded site doesn’t rely on it)
   • allowFileAccess={false}: Blocks access to local files, reducing potential tracking vectors

3. Test thoroughly before resubmitting

   • Use Xcode’s Network Inspector to monitor cookie activity when tracking is denied—you shouldn’t see any cookies being persisted after the WebView is closed
   • Test on a real device (not just simulator) to replicate the exact environment Apple uses for review
   • Use Apple’s App Store Connect Pre-Submission Check to catch issues early

Final Notes #

Incognito mode is a well-accepted solution for this scenario because it aligns perfectly with Apple’s App Tracking Transparency guidelines. By isolating the WebView session and preventing any persistent data storage, you’re explicitly honoring the user’s choice to not be tracked.

I’ve helped several devs fix identical rejection issues with this approach, so it should get you past the review once implemented correctly. Good luck with the resubmission!

内容的提问来源于stack exchange，提问作者johannb75