ios – 将现有核心数据迁移到iCloud

我有一个简单的应用程序,它是一个UITableView,由用户在不同的视图中填充一些UITextField来填充.此信息将保存到CoreData,并使用NSFetchedResultsController更新UITableView.

我现在正在将iCloud同步到我的环境中.参考之前提出的问题：Existing Core Data Database Not Uploading to iCloud When Enabling iCloud On My App,我仍然遇到问题,但是用我的新代码更新问题太麻烦了.我指的是WWDC 2013 CoreData Sessions,以及this.因为我的应用只是iOS 7.我是iCloud开发的新手,也是一名中级程序员.

当我从App Store(非iCloud)版本更新到开发(iCloud)版本时,我将现有数据迁移到iCloud时遇到很大困难.新数据完美同步.

据我所知,我需要在没有iCloud的情况下将我现有的商店迁移到iCloud,但这对我来说并不合适.

这里有一些代码来说明我正在做的事情：

更新

我已经完成并考虑了这一点并删除了多余的代码.

- (NSPersistentStoreCoordinator *)persistentStoreCoordinator
 {
     if (_persistentStoreCoordinator != nil) {
         return _persistentStoreCoordinator;
     }

     NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"PlAnner.sqlite"];
     NSFileManager *fm = [NSFileManager defaultManager];
     NSURL *url = [fm URLForUbiquityContainerIdentifier:nil];
     NSError *error = nil;
     _persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];

     if (url)
     {
         NSLog(@"iCloud is enabled");
         NSDictionary *options = @{
                                   NSMigratePersistentStoresAutomaticallyOption : @YES,NSInferMappingModelAutomaticallyOption : @YES,};

         NSPersistentStore *localStore = [_persistentStoreCoordinator addPersistentStoreWithType:NSsqliteStoreType configuration:nil URL:storeURL options:options error:&error];

         [_persistentStoreCoordinator migratePersistentStore:localStore toURL:[self iCloudURL] options:[self iCloudStoreOptions] withType:NSsqliteStoreType error:&error];

     }
     else
     {
         NSLog(@"iCloud is not enabled");
         NSDictionary *options = @{
                                   NSMigratePersistentStoresAutomaticallyOption : @YES,NSInferMappingModelAutomaticallyOption : @YES
                                   };

         if (![_persistentStoreCoordinator addPersistentStoreWithType:NSsqliteStoreType configuration:nil URL:[self iCloudURL] options:options error:&error])
         {
             NSLog(@"Unresolved error %@,%@",error,[error userInfo]);
             abort();

         }

     }

     dispatch_async(dispatch_get_main_queue(),^{

    [[NsnotificationCenter defaultCenter] postNotificationName:@"Reload" object:self userInfo:nil];
});

     return _persistentStoreCoordinator;
}

我不再@L_652_16@migrateLocalStoreToiCloud方法,但它在这里供参考：

/*-(void)migrateLocalStoreToiCloud
{
    //assuming you only have one store.
    NSPersistentStore *store = [[_persistentStoreCoordinator persistentStores] firstObject];
    NSPersistentStore *newStore = [_persistentStoreCoordinator migratePersistentStore:store
                                                                                toURL:[self iCloudURL]
                                                                              options:[self iCloudStoreOptions]
                                                                             withType:NSsqliteStoreType
                                                                                error:nil];
    [self reloadStore:newStore];
}

* /

storeURL,storeOptions,iCloudURL和iCloudStoreOptions代码是：

- (NSURL *)iCloudURL
{
    NSFileManager *fm = [NSFileManager defaultManager];
    NSURL *url = [fm URLForUbiquityContainerIdentifier:nil];
     if (url) {
     NSLog(@"iCloud access at %@",url);
     } else {
     NSLog(@"No iCloud access");
     }
    return url;
}

-(NSURL *)storeURL{
    return [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"PlAnner.sqlite"];
}


-(NSDictionary *)storeOptions{
    NSMutableDictionary *options = [[NSMutableDictionary alloc] init];
    [options setObject:[NSnumber numberWithBool:YES] forKey:NSMigratePersistentStoresAutomaticallyOption];
    [options setObject:[NSnumber numberWithBool:YES] forKey:NSInferMappingModelAutomaticallyOption];
    return options;
}

-(NSDictionary *)iCloudStoreOptions{
    NSMutableDictionary *options = [[NSMutableDictionary alloc] init];
    [options setObject:[NSnumber numberWithBool:YES] forKey:NSMigratePersistentStoresAutomaticallyOption];
    [options setObject:[NSnumber numberWithBool:YES] forKey:NSInferMappingModelAutomaticallyOption];
    [options setObject:@"PlAnnerStore" forKey:NSPersistentStoreUbiquitousContentNameKey];
    return options;
}

问题

当我完全按原样运行此代码时,我没有在使用本地存储的控制台中显示：1和0,尽管数据在那里.

如果我更改persistentStoreCoordinator,它首先添加persistentStore以使用[self iCloudStoreOptions]作为选项,则显示使用本地存储1和0,但数据不在设备上.

我正在遵循这里的指导,我尝试了多种代码,包括不在reloadStore方法中删除任何persistentStore,但我完全卡住了.

我已经阅读了这么多帖子,但似乎我找不到将数据从非iCloud版本迁移到iCloud版本的人,并且我找到的示例中没有代码.

我已经查看了this,虽然它是一个很棒的代码集,但我已经下载了代码并遵循了那些不删除任何persistentStore的指南,但它仍然不适用于我.我无法想象我想要实现的目标非常复杂.我只需要获取现有的非iCloud数据并将其迁移到iCloud.

更新

阅读Apple的指南：https://developer.apple.com/LIBRARY/ios/documentation/DataManagement/Conceptual/UsingCoreDataWithiCloudPG/UsingSQLiteStoragewithiCloud/UsingSQLiteStoragewithiCloud.html#//apple_ref/doc/uid/TP40013491-CH3-SW2我可以看到我的migrateLocaltoiCloud方法目前在删除persistentStore等方面是错误的,但我无法弄清楚如何修复它.如果我从persistentStoreCoordinator调用它,它会以某种方式干扰DidChangeNotification吗？

我真的坚持这一点,我希望任何指导正确的方向

NSPersistentStore *localStore = [_persistentStoreCoordinator addPersistentStoreWithType:NSsqliteStoreType configuration:nil URL:storeURL options:options error:&error];

 NSLog(@"The localStore is %@",localStorE);

 NSPersistentStore *migratedStore = [_persistentStoreCoordinator migratePersistentStore:localStore toURL:[self iCloudURL] options:[self iCloudStoreOptions] withType:NSsqliteStoreType error:&error];

 NSLog(@"The migrationStore is %@",migratedStorE); 

The NSLog value of localStore is: The localStore is <NSsqlCore: 0x13451b100> (URL: file:///var/mobile/Applications/DDB71522-C61D-41FC-97C7-ED915D6C46A4/Documents/PlAnner.sqlitE)

The NSLog value of migratedStore is: (null)

NSPersistentStore *migratedStore = [_persistentStoreCoordinator migratePersistentStore:localStore toURL:storeURL options:[self iCloudStoreOptions] withType:NSsqliteStoreType error:&error];

NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"PlAnner.sqlite"];

The localStore is <NSsqlCore: 0x14ee09b50> (URL: file:///var/mobile/Applications/CC0F7DA0-251F-46D6-8E43-39D63062AED2/Documents/PlAnner.sqlitE)
[PFUbiquitySwitchboardEntryMetadata setUseLocalStorage:](771): CoreData: Ubiquity:  mobile~5BD59259-7758-42FB-986F-DDD173F75ED3:EnStor
The migrationStore is <NSsqlCore: 0x157e260b0> (URL: file:///var/mobile/Applications/A08D183D-ECD4-4E72-BA64-D21727DE7A3E/Documents/CoreDataUbiquitySupport/mobile~CB6C3699-8BF1-47DB-9786-14BCE1CD570A/EnStor/771D2B0B-870A-428E-A9A8-5DAE1295AF53/store/PlAnner.sqlitE)