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我正在使用核心数据制作应用程序。
它是 facebook 应用程序，所以我将用户信息保存到 core-data。
我想将个人资料图片添加到用户信息数据中。

    for (UserInfo *info in fetchedObjects) {
        if ([info.fbId isEqualToString:delegate.currentUserInfo.fbId]) {
            info.details.photos.image  = [NSData dataWithContentsOfURL:url];
            info.details.photos.imageId = [result objectForKey:@"id"];
            info.details.photos.details = info.details;

            delegate.currentUserInfo = info;

            for (UserInfo *info in fetchedObjects) {
                NSLog(@"currentUserInfo : %@", info);
                NSLog(@"curretnUserDetails : %@", info.details);
                NSLog(@"currentUserPhoto : %@", info.details.photos);
            }

            if (![context save:&error]) {
                NSLog(@"Whoops, couldn't save: %@", [error localizedDescription]);
            }
        }
    }

像这样，我将数据添加到与FB用户ID对应的core-data（relationshop命名照片）中。

结果，中间的NSLog很好地显示了photoInfo数据，但是当我重新启动我的应用程序时，没有照片数据。
我好几天没解决这个问题。帮我！

-编辑

在此处输入图像描述

DataModel 的组织方式如下图所示。
我只使用一种上下文，而且我是新手，所以我无法理解所有感谢评论。

-编辑2

 if (!beExist) {
        UserInfo *userInfo = [NSEntityDescription insertNewObjectForEntityForName:@"UserInfo" inManagedObjectContext:context];
        userInfo.name = [myInfoDic objectForKey:@"name"];
        userInfo.fbId = [myInfoDic objectForKey:@"id"];
        userInfo.type = @"user";
        UserDetails *userDetails = [NSEntityDescription insertNewObjectForEntityForName:@"UserDetails" inManagedObjectContext:context];
        userDetails.gender = [myInfoDic objectForKey:@"gender"];
        userDetails.work = [[[[myInfoDic objectForKey:@"work"] objectAtIndex:0] objectForKey:@"employer"] objectForKey:@"name"];
        NSArray *eduArray = [myInfoDic objectForKey:@"education"];
        userDetails.education = [[[eduArray objectAtIndex:eduArray.count-1] objectForKey:@"school"] objectForKey:@"name"];
        userDetails.birthday = [myInfoDic objectForKey:@"birthday"];
        userDetails.location = [[myInfoDic objectForKey:@"location"] objectForKey:@"name"];
        PhotoInfo *photoInfo = [NSEntityDescription insertNewObjectForEntityForName:@"PhotoInfo" inManagedObjectContext:context];

        userDetails.info = userInfo;
        userInfo.details = userDetails;
        userInfo.details.photos = photoInfo;
        photoInfo.details = userDetails;

        delegate.currentUserInfo = userInfo;

        if (![context save:&error]) {
            NSLog(@"Whoops, couldn't save: %@", [error localizedDescription]);
        }

我保存了这样的用户信息。我在 AppDelegate 中创建了上下文。我为 Core data 制作了项目，所以 Xcode 制作了那个代码。

我可以看到这个日志

2012-05-04 00:40:58.997 Feek[16423:fb03] currentUserPhoto : <PhotoInfo: 0x6d15d60> (entity: PhotoInfo; id: 0x6d18550 <x-coredata://2ED200FE-D799-4C66-A0AC-5BE1BC426439/PhotoInfo/p1> ; data: {
details = "0x8830ca0 <x-coredata://2ED200FE-D799-4C66-A0AC-5BE1BC426439/UserDetails/p1>";
image = <ffd8ffe0 00104a46 49460001 02000001 00010000 fffe0004 2a00ffe2 021c4943 435f5052 4f46494c 45000101 0000020c 6c63>;
imageId = 334168116641714;
})

我认为这是核心数据接受数据，但在杀死我的应用程序后它不会保留。

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