Question

移动UIManagedDocument的代码是什么，其中包含从本地到iCloud目录的一些数据？我理解我需要使用migratePersistentStore功能，但是当我不明白我应该如何使用托管文档时，并且没有如何执行此操作的示例。我现在挣扎了两个星期。堆栈溢出有很多这些问题，但没有一个得到答案？难道这难吗？只需一种方法将现有文档移至iCloud？

-(void)transferFileFromLocalDirectory:(NSURL*)localURL ToiCloudDirectory:(NSURL*)iCloudURL{
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
            NSLog(@"Successfully set document ubiquitous");
            UIManagedDocument* doc=[[UIManagedDocument alloc]initWithFileURL:iCloudURL];
            doc.persistentStoreOptions=[self getPersistentOptionsFromDocumentMetadataAtURL:[iCloudURL URLByAppendingPathComponent:@"DocumentMetadata.plist"]];

            [doc saveToURL:doc.fileURL forSaveOperation:UIDocumentSaveForCreating completionHandler:^(BOOL success){
                UIManagedDocument* localDoc=[[UIManagedDocument alloc]initWithFileURL:localURL];
                NSPersistentStoreCoordinator* psc=[[NSPersistentStoreCoordinator alloc]initWithManagedObjectModel:localDoc.managedObjectModel];
                NSPersistentStore* store=[[psc persistentStores]lastObject];
                if(!store){
                    store=[[NSPersistentStore alloc]initWithPersistentStoreCoordinator:psc configurationName:nil URL:[[localURL URLByAppendingPathComponent:@"StoreContent"]URLByAppendingPathComponent:@"persistentStore"] options:nil];
                }
                NSLog(@"store : %@",store);
                NSError* error2=nil;
                [psc migratePersistentStore:store toURL:[[localURL URLByAppendingPathComponent:@"StoreContent"]URLByAppendingPathComponent:@"persistentStore"] options:nil withType:NSSQLiteStoreType error:&error2];
                if(error){
                    NSLog(@"error migrating persistent store:\n%@",error);
                }
            }];
    });
}

我得到了这个输出

2013-12-07 20:15:45.284 iGymPRO[1111:3707] store : <NSPersistentStore: 0x15eb7a20> (URL: file:///var/mobile/Applications/610A9443-002A-42EA-8A66-E4D43F609672/Documents/Data%20Document/StoreContent/persistentStore)
2013-12-07 20:15:45.290 iGymPRO[1111:3707] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Can't find store type for store <NSPersistentStore: 0x15eb7a20> (URL: file:///var/mobile/Applications/610A9443-002A-42EA-8A66-E4D43F609672/Documents/Data%20Document/StoreContent/persistentStore) (class == NSPersistentStore) in {
    Binary = "<8c3b9f3a>";
    InMemory = "<54419f3a>";
    SQLite = "<dc459f3a>";
}.'

Answer 1

查看此link explaining UIManagedDocument and iCloud Integration and providing details of the classes and methods involved in doing this

另请查看this video showing how the app works when creating UIManagedDocuments and moving them to and from iCloud以确认您要实现的目标。

如何将UIManagedDocument移动到iCloud

1 个答案: