Question

您好，我想知道是否有人可以帮我解决此核心数据问题。

我目前有两个人，User和Product。 User与Product存在多对多的关系而且没有反向关系（因为我不想知道User对Product有什么影响，只有Product sa User有。使用Xcode为我生成的子类中的addProductsObject方法，向用户添加产品可以正常工作。问题是当我尝试从{{1}中删除Product对象时使用User看起来很好。上传在AppDelegate的removeProductsObject上关闭。但是如果我在Xcode中运行我的应用程序或者杀死应用程序并再次启动它，那么这种关系仍然存在它没有被删除！

Objective-C，iOS 8 Simulator，Xcode 6.1.1

任何人都有任何想法？

更新：Zip Project here if anyone would like to take a look!

图片链接到关系设置的屏幕截图

enter image description here

添加产品：

applicationDidEnterBackground

删除产品：

- (void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath {
  [user addProductsObject:[self.products objectAtIndex:indexPath.row]];
  [self.navigationController popViewControllerAnimated:YES];
}

SQL日志：

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        [user removeProductsObject:[self.products objectAtIndex:indexPath.row]];
        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
    }
}

运行2015-02-18 22:41:17.635 Project[22802:1254740] CoreData: sql: SELECT 0, t0.Z_PK, t0.Z_OPT, t0.ZDOB, t0.ZEMAIL, t0.ZFIRSTNAME, t0.ZLASTNAME, t0.ZLOCATION, t0.ZPASSWORD, t0.ZUSERNAME FROM ZUSER t0 WHERE t0.ZUSERNAME = ? 2015-02-18 22:41:17.635 Project[22802:1254740] CoreData: annotation: sql connection fetch time: 0.0003s 2015-02-18 22:41:17.635 Project[22802:1254740] CoreData: annotation: total fetch execution time: 0.0005s for 1 rows. 2015-02-18 22:41:18.958 Project[22802:1254740] CoreData: sql: SELECT 0, t0.Z_PK FROM ZPRODUCT t0 WHERE t0.Z6PRODUCTS = ? 2015-02-18 22:41:18.959 Project[22802:1254740] CoreData: annotation: sql connection fetch time: 0.0002s 2015-02-18 22:41:18.959 Project[22802:1254740] CoreData: annotation: total fetch execution time: 0.0004s for 2 rows. 2015-02-18 22:41:18.959 Project[22802:1254740] CoreData: annotation: to-many relationship fault "products" for objectID 0xd000000000040000 <x-coredata://1C19A10A-BD0E-480B-B4A2-F6BBB26D9F74/User/p1> fulfilled from database. Got 2 rows 2015-02-18 22:41:18.963 Project[22802:1254740] CoreData: sql: SELECT 0, t0.Z_PK, t0.Z_OPT, t0.ZBARCODE, t0.ZCALORIES, t0.ZCARBOHYDRATES, t0.ZDESC, t0.ZFAT, t0.ZFIBRE, t0.ZNAME, t0.ZPROTEIN, t0.ZSALT, t0.Z6PRODUCTS FROM ZPRODUCT t0 WHERE t0.Z_PK = ? 2015-02-18 22:41:18.963 Project[22802:1254740] CoreData: annotation: sql connection fetch time: 0.0002s 2015-02-18 22:41:18.963 Project[22802:1254740] CoreData: annotation: total fetch execution time: 0.0005s for 1 rows. 2015-02-18 22:41:18.964 Project[22802:1254740] CoreData: annotation: fault fulfilled from database for : 0xd0000000000c0002 <x-coredata://1C19A10A-BD0E-480B-B4A2-F6BBB26D9F74/Product/p3> 2015-02-18 22:41:18.965 Project[22802:1254740] CoreData: sql: SELECT 0, t0.Z_PK, t0.Z_OPT, t0.ZBARCODE, t0.ZCALORIES, t0.ZCARBOHYDRATES, t0.ZDESC, t0.ZFAT, t0.ZFIBRE, t0.ZNAME, t0.ZPROTEIN, t0.ZSALT, t0.Z6PRODUCTS FROM ZPRODUCT t0 WHERE t0.Z_PK = ? 2015-02-18 22:41:18.965 Project[22802:1254740] CoreData: annotation: sql connection fetch time: 0.0002s 2015-02-18 22:41:18.965 Project[22802:1254740] CoreData: annotation: total fetch execution time: 0.0003s for 1 rows. 2015-02-18 22:41:18.965 Project[22802:1254740] CoreData: annotation: fault fulfilled from database for : 0xd000000000100002 <x-coredata://1C19A10A-BD0E-480B-B4A2-F6BBB26D9F74/Product/p4>生成这些日志，很奇怪为什么没有更新。同样为什么[managedObjectContext save:]有一个名为Product的字段。我打开了SQL数据库，在实体products中有一个叫做Products的int。

ANSWERED 问题是我为Core Data Object编写了一些自己的方法getter，这似乎打破了核心数据生成类。摆脱这些，一切正常！我现在也得到了倒数。