使用MagicalRecord的fetchedResultsController代码的替代方案？

Question

使用MagicalRecord的fetchedResultsController代码的替代方案？

iphoneiosuitableviewcore-datamagicalrecord

8

我正在将我的应用程序核心数据转移到Magical Record。为了更新UITableView，我以前有这段代码：

- (NSFetchedResultsController *)fetchedResultsController {

    if (_fetchedResultsController != nil) {
        return _fetchedResultsController;
    }

    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
    NSEntityDescription *entity = [NSEntityDescription entityForName:@"Entry" inManagedObjectContext:[CoreDataStore mainStore].context];
    [fetchRequest setEntity:entity];

    [fetchRequest setFetchBatchSize:20];

    NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"creationDate" ascending:NO];
    NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil];

    [fetchRequest setSortDescriptors:sortDescriptors];

    // Use the sectionIdentifier property to group into sections.
    NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:[CoreDataStore mainStore].context sectionNameKeyPath:@"sectionIdentifier" cacheName:@"Root"];
    aFetchedResultsController.delegate = self;
    self.fetchedResultsController = aFetchedResultsController;

    self.fetchedResultsController.delegate = self;

    return _fetchedResultsController;
}

我应该将这段代码保留在原处，还是应该使用Magical Record使其工作方式不同？

- Andrew

1个回答

网页内容由stack overflow 提供, 点击上面的

可以查看英文原文，
原文链接

- gabriel_rinaldi · Accepted Answer

你可以像这样使用：

- (NSFetchedResultsController *)fetchedResultsController {
    if (_fetchedResultsController != nil) {
        return _fetchedResultsController;
    }

    _fetchedResultsController = [NSManagedObject fetchAllGroupedBy:nil withPredicate:nil sortedBy:@"date" ascending:NO delegate:self];

    return _fetchedResultsController;
}

你需要用你自己的子类替换 NSManagedObject。

你可以在这里查看其他选项（头文件底部）。