Sharing data between Targets via App groups but Userdefault Container is null

Question

Created Feb ’25

Replies 4

Boosts 0

Participants 2

Dear Apple Support Team,

I am trying to shared data between two different App target. Target A is main iOS app and Target B is Intent Extension. I have create app group and utilise app group to share data between different target but when setting the user default from Target B stile getting container null.

Target B UserDefault object details

sharedDefaults UserDefaults 0x0000600000c05110 baseNSObject@0 NSObject kvo id 0x0 0x0000000000000000 [0] id identifier __CFString * "group.com.xxxx. xxxx" 0x0000600001704900 container __CFString * NULL 0x0000000000000000 _volatileDomainNames id 0x0 0x0000000000000000 [0] id

Code snippet in Target B to setting UserDefault

    guard let sharedDefaults = UserDefaults(suiteName: SharedUserDefaults.suitName)else {
        completion(MuteIntentResponse(code: .failure, userActivity: nil))
        return
    }
    ///["event": AudioCommand.mute.rawValue]
    sharedDefaults.set("test", forKey: SharedUserDefaults.Keys.audioCommand)
    let didSynchronize =  sharedDefaults.synchronize()
    
    print("Intent Extension: Wrote Synchronize successful: \(didSynchronize)")
    
    guard let command = sharedDefaults.string(forKey: SharedUserDefaults.Keys.audioCommand) else {
        completion(MuteIntentResponse(code: .failure, userActivity: nil))
        return
    }
    
    print("userDef \(command)")

While reading UserDefault value in Target A

UserDefault object details baseNSObject@0 NSObject isa Class NSUserDefaults 0x01000001efe1a8a9 kvo id 0x0 0x0000000000000000 identifier __CFString * "group.com.xxxx. xxxx” 0x0000600001782200 container __CFString * NULL 0x0000000000000000 _volatileDomainNames id 0x0 0x0000000000000000 [0] id

Reading UserDefault value Code

if let def = UserDefaults(suiteName: SharedUserDefaults.suitName){ print("commandInfo (def.string(forKey: SharedUserDefaults.Keys.audioCommand))") }

Please let me know what I am doing wrong.

Boost

Answer 1

Engineer OP

Apple

Feb ’25

Are the App Groups defined in both the main app and extension?

0

Answer 2

jainmca12 OP

Feb ’25

Yeah, App groups are defined in both target.

0

Answer 3

jainmca12 OP

Feb ’25

Main app bundle identifier: in.***.app Intent extension identifier: in.***.app.MuteIntent App group: group.in.xxxx.shared

I have save value A in Main App target and B in Intent extension target against the same key and re-run the app. Both target have its own value which I saved previously. It means UserDefaults in not shared between targets.

Also tested same behaviour with Message extension where UserDefaults sharing working fine.

xcode: 16.2 iOS simulator: iphone 16 pro 18.1

Is it limitation with Intent extension (Siri)?

0

Answer 4

jainmca12 OP

Feb ’25

Thanks for your support.

I've resolved the issue. The problem was caused by conflicting entitlements. When the App Group capability was added, a new entitlements file was generated. To fix this, I merged the App Group information into the existing entitlements file, and the problem is now resolved.

0