iCloud 同步 Ubiquity 错误

Question

我在我的应用程序中集成了 iCloud，并且同步工作正常，但有时我会收到此错误：

+[PFUbiquityTransactionLog loadPlistAtLocation:withError:](324): CoreData: Ubiquity:  
Encountered an error trying to open the log file at the location: <PFUbiquityLocation: 
0x1993c0>: /private/var/mobile/Library/Mobile Documents/ ...
Error: Error Domain=NSCocoaErrorDomain Code=256 "The operation couldn’t be completed. 
(Cocoa error 256 - The item failed to download.)"

-[PFUbiquityTransactionLog loadComparisonMetadataWithError:](220): CoreData: Ubiquity:  
Error encountered while trying to load the comparison metadata for transaction log: 
<PFUbiquityTransactionLog: 0x1a3d60>
transactionLogLocation: <PFUbiquityLocation: 0x1993c0>: /private/var/mobile/Library/Mobile Documents/
transactionNumber: (null)

Error: Error Domain=NSCocoaErrorDomain Code=134302 "The operation couldn’t be completed. 
(Cocoa error 134302.)" UserInfo=0x1a50e0 {reason=Error during property list parsing during 
import or opening of log file at location: <PFUbiquityLocation: 0x1993c0>:    
/private/var/mobile/Library/Mobile Documents/ ... Error Domain=NSCocoaErrorDomain Code=256  
"The operation couldn’t be completed. (Cocoa error 256 - The item failed to download.)"

不知道这意味着什么，但如果我等一下，似乎 iCloud 合并完成了......有人知道如何解决这个问题吗？

我试过设置

[_document.managedObjectContext 
   setMergePolicy:NSMergeByPropertyStoreTrumpMergePolicy] 

但没有任何帮助...

谢谢！

Answer 1

这种日志只是提供信息。

iCloud 守护程序只能通过获取其元数据来查看文件是否在您的无处不在的容器中。下载文件内容是第二个单独的步骤。

如果下载文件失败，它将稍后尝试下载。