Core data RestKit和可折叠菜单，与核心数据同步

我正在使用RestKit和RRNCollapsableTable。问题是，当我第一次加载视图时，RestKit正在从JSON下载数据。该延迟导致菜单无法加载。我想做的是让CollapsableTable等待数据

[self requestData:^(BOOL success) {
    if (success) {
        _menu = [self buildMenu];
        [self model];
    }
}];

- (void)requestData:(void (^)(BOOL success))completionBlock {
NSFetchRequest *fetchRequest = [NSFetchRequest fetchRequestWithEntityName:@"Messages"];
NSSortDescriptor *byId = [NSSortDescriptor sortDescriptorWithKey:@"customNewsId" ascending:YES];
fetchRequest.sortDescriptors = @[byId];
NSError *error = nil;

// Setup fetched results
self.fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest
                                                                    managedObjectContext:[RKManagedObjectStore defaultStore].mainQueueManagedObjectContext
                                                                      sectionNameKeyPath:@"customNewsId"
                                                                               cacheName:nil];


//[self.fetchedResultsController setDelegate:self];
BOOL fetchSuccessful = [self.fetchedResultsController performFetch:&error];
if (!fetchSuccessful) {
    abort();
}

[[RKObjectManager sharedManager] getObjectsAtPath:@"api/json/get/bZmroLaBCG" parameters:nil success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
    RKLogInfo(@"Load complete: Table should refresh...");

    //[[NSUserDefaults standardUserDefaults] setObject:[NSDate date] forKey:@"LastUpdatedAt"];
    //[[NSUserDefaults standardUserDefaults] synchronize];
    NSError *error = nil;
    if ([[RKManagedObjectStore defaultStore].mainQueueManagedObjectContext hasChanges] && ![[RKManagedObjectStore defaultStore].mainQueueManagedObjectContext saveToPersistentStore:&error]) {
        // Replace this implementation with code to handle the error appropriately.
        // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
        NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
        abort();
    }
    completionBlock(YES);
} failure:^(RKObjectRequestOperation *operation, NSError *error) {
    RKLogError(@"Load failed with error: %@", error);
    completionBlock(NO);
}];
completionBlock(YES);

}

然后BuildMenu只是对获取的对象进行迭代，并将它们放在节中

-(NSArray *)buildMenu {
__block NSMutableArray *collector = [NSMutableArray new];

NSInteger sections = [self.fetchedResultsController.sections count];

for (NSInteger i = 0; i < sections; i++) {
    Messages *message = [_fetchedResultsController objectAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:i]];

    MenuSection *section = [MenuSection new];

    section.items = @[message.message,message.pushNotificationMessage];
    section.title = message.title;
    NSLog(@"section.title - %@",section.title);


    [collector addObject:section];
}
return [collector copy];
}

提前感谢您的帮助

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您好。

所以在完成块中构建菜单？我就是这么做的，但看起来完成块并不等待成功块…我没有看到它在块中被调用。。。

-(NSArray *)model {
return _menu;
}