PhoneGap应用中iframe在Xcode模拟器无法显示问题求助

Hey there! Let's work through this iframe issue you're facing—since you're new to PhoneGap, I'll break down the most common fixes step by step:

1. Fix iOS ATS Restrictions (Most Likely Culprit) #

iOS 9+ has App Transport Security (ATS) enabled by default, which blocks non-HTTPS network requests. If your target website uses HTTP (not HTTPS), the simulator will refuse to load it even if your browser allows it.

Add this to your config.xml inside the <platform name="ios"> section (replace your-target-ip with the actual IP of the site):

<platform name="ios">
    <!-- Allow navigation to your target IP -->
    <allow-navigation href="http://your-target-ip/*" />
    
    <!-- Add ATS exception for the IP -->
    <edit-config file="*-Info.plist" mode="merge" target="NSAppTransportSecurity">
        <dict>
            <key>NSExceptionDomains</key>
            <dict>
                <key>your-target-ip</key>
                <dict>
                    <key>NSIncludesSubdomains</key>
                    <true/>
                    <key>NSAllowsArbitraryLoads</key>
                    <true/>
                </dict>
            </dict>
        </dict>
    </edit-config>
</platform>

If you want a broader (less secure) fix for testing, you can use <key>NSAllowsArbitraryLoads</key><true/> directly under NSAppTransportSecurity, but it's better to restrict it to your specific IP for production.

2. Double-Check config.xml Network Permissions #

You added <allow-navigation> tags, but don't forget the <access> tag which controls general network access for your app:

<access origin="*" /> <!-- Allows your app to make network requests to any domain -->

Make sure all these permission tags are directly under the root <widget> element in config.xml—not nested inside other tags like <platform>.

3. Verify Cross-Origin Resource Sharing (CORS) Settings #

Even if the browser loads the iframe, the PhoneGap WebView might enforce stricter CORS rules. Check if the target website's server sends the Access-Control-Allow-Origin header. If it's your own server, add this header to allow your app to access it:

Access-Control-Allow-Origin: *

Or restrict it to your app's origin for better security.

4. Test Network Accessibility in the Simulator #

Make sure the iOS simulator can actually reach the target IP:

• Open Safari in the simulator and try navigating to http://your-target-ip directly. If it doesn't load, the issue is network-related (e.g., the simulator is on a different network than the server).
• If you're running the website locally on your computer, use http://localhost:your-port instead of your external IP—simulators can access localhost directly if the server is running on your machine.

5. Check for Console Errors #

Open Xcode's debug console (View > Debug Area > Activate Console) while running the app. Look for errors like:

• App Transport Security has blocked a cleartext HTTP (ATS issue)
• No 'Access-Control-Allow-Origin' header is present (CORS issue)
  These errors will point you directly to the root cause.

Start with the ATS fix first—it's the most common reason for this problem in iOS simulators. Let me know if any of these steps help!

内容的提问来源于stack exchange，提问作者Nicole Havin