I am building a share extension in iOS that allows users to share a URL (e.g., from Instagram) to my app. My extension works perfectly when I use:

<key>NSExtensionActivationRule</key>
<string>TRUEPREDICATE</string>

However, this gets rejected by Apple when I try to upload the build to TestFlight with the following error:

Invalid Info.plist value. The value for the key ‘NSExtensionActivationRule’ in bundle … is invalid.

To comply with Apple’s guidelines, I am trying to use a specific activation rule for URLs. My current Info.plist looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>NSExtension</key>
    <dict>
        <key>NSExtensionAttributes</key>
        <dict>
            <key>NSExtensionActivationRule</key>
            <string>
                ANY NSExtensionItems.attachments.contentTypeUTI == "public.url"
            </string>
        </dict>
        <key>NSExtensionMainStoryboard</key>
        <string>MainInterface</string>
        <key>NSExtensionPointIdentifier</key>
        <string>com.apple.share-services</string>
    </dict>
</dict>
</plist>

However, with this rule:

The share extension does not appear in the share sheet when I try to share a URL.

Debugging logs confirm that the attachment type is public.url

Attachment Type Identifiers: ["public.url"]

What I Have Tried:

• I used NSExtensionActivationSupportsAttachmentsWithMatchingTypeIdentifiers like this:

<key>NSExtensionActivationSupportsAttachmentsWithMatchingTypeIdentifiers</key>
<array>
    <string>public.url</string>
</array>

Result: The extension still doesn’t show up.

• I ensured the App Group is correctly configured for both the main app and the extension target.
• I cleared caches, deleted the app from the device, and rebooted the device.

Working State (but Rejected by Apple):

If I use:

<key>NSExtensionActivationRule</key>
<string>TRUEPREDICATE</string>

The extension appears correctly in the share sheet and works as expected, but Apple rejects it during validation (when I try to upload my app to TestFlight).

Questions:

1. Why doesn’t my share extension appear in the share sheet when targeting public.url with a proper NSExtensionActivationRule?

2. What is the correct and Apple-compliant way to configure NSExtensionActivationRule so the extension appears for URLs and passes TestFlight validation?