NSPersistentCloudKitContainer doesn't sync records on iCloud until switching the app to background/foreground
Originator: | mshibanami | ||
Number: | rdar://FB9094758 | Date Originated: | May 2, 2021 at 9:04 PM |
Status: | Open | Resolved: | No |
Product: | macOS | Product Version: | macOS Big Sur 11.3.1 (20E241) |
Classification: | Core Data API | Reproducible: | Always |
Basic Information Please provide a descriptive title for your feedback: NSPersistentCloudKitContainer doesn't sync records on iCloud until switching the app to background/foreground Which area are you seeing an issue with? Core Data API What type of issue are you reporting? Incorrect/Unexpected Behavior Description Please describe the issue and what steps we can take to reproduce it: ## Environment - macOS Big Sur 11.3 (20E232) - Xcode 12.5 (12E262) ## Description of the problem `NSPersistentCloudKitContainer` doesn't send newly created/modified/removed records to iCloud immediately. It only syncs: - When the persistent container was loaded - When the app was switched to background - When the app was switched to foreground To demonstrate this issue, I attached 2 videos: - One is with CloudKit Dashboard - Another one is with multiple Macs Also, I attached my source code (RedirectWebForSafari.zip) that was used for the above videos. The code creating NSPersistentCloudKitContainer is here: `RedirectWebForSafari/RedirectWebForSafari/Modules/Database/AnyCoreDataRepository.swift` Hope these will be helpful. ## step-by-step set of instructions to reproduce the problem 1. Create `NSPersitentCloudKitContainer` object that can sync records via iCloud 2. Add a record with the container's `viewContext` and do `try viewContext.save()` ## Expected Result The added record is uploaded to the iCloud and I can find it on CloudKit Dashboard. ## Actual Result The added record is not uploaded to the iCloud and I can't find it on CloudKit Dashboard. To upload it, I need to change the app to background/foreground, or quit & reopen the app. By the way, I found another person who got this issue, on Twitter: https://twitter.com/simonemontalto/status/1286659669046505472?s=21
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