声明NSManagedObjectContext时出错 [英] Error when declaring NSManagedObjectContext

问题描述

我正在尝试创建一个NSManagedObjectContext对象。它们的错误内容如下：

I'm trying to create a NSManagedObjectContext object. They error reads as follows:

'NSManagedObjectContext'之前的预期说明符 - 限定符 - 列表

Expected specifier-qualifier-list before 'NSManagedObjectContext'

这是我的头文件：

#import <UIKit/UIKit.h>


@interface FavouritesViewController : UITableViewController {
  NSArray *favourites;
  NSManagedObjectContext *context;
}

@property (nonatomic, retain) NSArray *favourites;
@property (nonatomic, retain) NSManagedObjectContext *context;

@end

任何人都知道我可能会在这里失踪？

Anyone know I might be missing here?

推荐答案

很可能您忘记在文件中包含CoreData标头。在行 #import< UIKit / UIKit.h> 之后，你需要另一行读取 #import< CoreData / CoreData.h> 。在此之后，文件应编译正常。还要确保链接库中有CoreData，否则会出现运行时错误。

Most probably you have forgotten to include the CoreData header in your file. Right after the line #import <UIKit/UIKit.h> you need another line that reads #import <CoreData/CoreData.h>. After this the file should compile fine. Also make sure that you have CoreData in your linked libraries, otherwise you will get runtime errors.

这篇关于声明NSManagedObjectContext时出错的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！