问题
I have an app that uses Core Data with iCloud sync. It works great in iOS 7.
I'm having some trouble since running it in XCode 6 though, even on an iOS 7 device. Here's my test:
- on iOS 7 device: Download current live app from app store
- Sync data from iCloud
- Build and run new version of app
- Persistent Stores change, original data no longer available
Here's screen shots of my provisioning profile and xcode setup:
I've also tried the following entitlements:
- Just
com.apple.developer.icloud-container-identifiers com.apple.developer.ubiquity-container-identifiersthis is what I had before. When I run the test with this in place the data is there first time but not on second run. There's no events about the store changing, but it saysUsing local storage: 1on first and second run- Both of the above. Get the same results as #2
回答1:
It looks like based on the screenshot of the entitlements that you have both the old (ubiquity container) and new (iCloud container) related entitlements. I found, and have seen reported, issues when both old and new entitlements are present.
For my app I kept only the old entitlements and deleted the two new ones that XCode 6 will attempt to add to fix issues that it believes are present with iCloud. The two keys I removed were:
- com.apple.developer.icloud-container-identifiers
- com.apple.developer.icloud-services
I kept only the original key (com.apple.developer.ubiquity-container-identifiers) and did not change it's value. With that the app still works in iOS 7 when built using XCode 6 GM and can access all of the data as before. In iOS 8 it will also work however it seems to require the user to have updated their account to iCloud Drive.
来源：https://stackoverflow.com/questions/25818825/icloud-core-data-not-available-after-running-in-xcode-6-ios-8-sdk