Hi everyone. We try to implement background assets to our project. And and encountered this problem.
When try to send background event from terminal
xcrun backgroundassets-debug --simulate --app-periodic-check -d [DEVICE_ID] -b [APP_BUNDLE_IDENTIFIER]
In console.app in device log we saw this type of logs
Text version :)
Resetting extension runtime for: [APP_BUNDLE_IDENTIFIER]
Application info for ([APP_BUNDLE_IDENTIFIER]) is being updated based on URL:(N/A)
Failed to find represented extension point. (ID:[APP_BUNDLE_IDENTIFIER]
Event (7) dropped for client ([APP_BUNDLE_IDENTIFIER]) failed because the app and extension do not share any application groups.
Tried on Xcode 15, iOS 17.0.2, MacOS 14
App Info.plist (in yml style)
---- part
<key>app-group</key>
<string>group.com.*******.MobileFWDemo</string>
<key>app-group-asset</key>
<string>group.com.*******.BackgroundAsset.Container</string>
<key>BAInitialDownloadRestrictions</key>
<dict>
<key>BADownloadAllowance</key>
<integer>1610612736</integer>
<key>BADownloadDomainAllowList</key>
<array>
<string>devstreaming-cdn.apple.com</string>
<string>developer.apple.com</string>
<string>http://example.com/</string>
<string>https://www.learningcontainer.com/</string>
<string>https://file-examples.com</string>
</array>
<key>BAEssentialDownloadAllowance</key>
<integer>1073741824</integer>
</dict>
<key>BAManifestURL</key>
<string>https://developer.apple.com/sample-code/background-assets/SessionsManifest.plist</string>
<key>BAMaxInstallSize</key>
<string>1610612736</string>
----- part
In BAExtension info.plist
<dict>
<key>app-group</key>
<string>group.com.*******.MobileFWDemo</string>
<key>app-group-asset</key>
<string>group.com.*******.BackgroundAsset.Container</string>
<key>EXAppExtensionAttributes</key>
<dict>
<key>EXExtensionPointIdentifier</key>
<string>com.apple.background-asset-downloader-extension</string>
<key>EXPrincipalClass</key>
<string>BackgroundDownloadHandler</string>
</dict>
</dict>
App Entitlement
<dict>
<key>aps-environment</key>
<string>development</string>
<key>com.apple.developer.applesignin</key>
<array>
<string>Default</string>
</array>
<key>com.apple.developer.associated-domains</key>
<array>
<string>applinks:******.onelink.me</string>
</array>
<key>com.apple.developer.game-center</key>
<true/>
<key>com.apple.security.application-groups</key>
<array>
<string>group.com.******.BackgroundAsset.Container</string>
<string>group.com.******.MobileFWDemo</string>
</array>
</dict>
Extension Entitlement
<dict>
<key>com.apple.security.application-groups</key>
<array>
<string>group.com.*******.MobileFWDemo</string>
<string>group.com.*******.BackgroundAsset.Container</string>
</array>
</dict>
Method - not called
- (NSSet<BADownload *> *)downloadsForRequest:(BAContentRequest)contentRequest
manifestURL:(NSURL *)manifestURL
extensionInfo:(BAAppExtensionInfo *)extensionInfo
After add Background Asset Extension a new warning appeared in the logs:
Execution of the command buffer was aborted due to an error during execution. Insufficient Permission (to submit GPU work from background) (00000006:kIOGPUCommandBufferCallbackErrorBackgroundExecutionNotPermitted)
Maybe it wiil be connected to my problem.
Could someone help ?)
