重命名coredata .xcdatamodeld文件和迁移

Question

我们有两个独立的应用程序,我们已合并到同一工作区中的2个目标.两者都有他们的核心数据模型(app1.xcdatamodeld和app2.xcdatamodeld).

既然两者都在同一个工作区,就不需要2个模型,因为它们有99%的相似性.所以我想将.xcdatamodeld包的名称更改为allApps.xcdatamodeld.我能够重命名它,但是在执行此操作时我没有找到有关迁移行为的任何参考.

这是错误 -

2015-07-28 09:04:06.079 AppName[51306:1423128] CoreData: error:
-addPersistentStoreWithType:SQLite configuration:(null) URL:file:///Users/shani/Library/Developer/CoreSimulator/Devices/EA75A69F-B108-4036-AB3D-B923F83D16DE/data/Containers/Data/Application/B1CB3AF3-DEF4-40DF-9A61-721063ECBB1D/Documents/AppName.sqlite
options:{
    NSInferMappingModelAutomaticallyOption = 1;
    NSMigratePersistentStoresAutomaticallyOption = 1;
    NSSQLitePragmasOption =     {
        "journal_mode" = WAL;
    }; } ... returned error Error Domain=NSCocoaErrorDomain Code=134130 "The operation couldn’t be completed. (Cocoa error
134130.)" UserInfo=0x7fc39c194360 {URL=file:///Users/shani/Library/Developer/CoreSimulator/Devices/EA75A69F-B108-4036-AB3D-B923F83D16DE/data/Containers/Data/Application/B1CB3AF3-DEF4-40DF-9A61-721063ECBB1D/Documents/AppName.sqlite,
metadata={
    NSPersistenceFrameworkVersion = 519;
    NSStoreModelVersionHashes =     {
        Attempt = <b4d1e878 69a97917 e751a67c 89e1887a ae4df1dc f380e4ee c9585f60 f39ff51e>;
        BookmarkFlashcard = <33112f7c 2fa20bec eb2e019c b5d619b4 92be2547 a65fabee 1ac86ab7 92dd77bb>;
        BookmarkQuestion = <38634b49 71f0d43c 6f9fbba9 bc2f1b81 675c9b3c f2da017e fc8de9d8 4e18a4a0>;
        Category = <b0e4d91b 0c0ebc71 ed0f403c 9a0eec20 fc1686aa 0169bc60 4bcc7e57 165bce15>;
    };
    NSStoreModelVersionHashesVersion = 3;
    NSStoreModelVersionIdentifiers =     (
        ""
    );
    NSStoreType = SQLite;
    NSStoreUUID = "F1B37CD0-8B89-4893-A262-1013C3544026";
    "_NSAutoVacuumLevel" = 2; }, reason=Can't find model for source store} with userInfo dictionary {
    URL = "file:///Users/shani/Library/Developer/CoreSimulator/Devices/EA75A69F-B108-4036-AB3D-B923F83D16DE/data/Containers/Data/Application/B1CB3AF3-DEF4-40DF-9A61-721063ECBB1D/Documents/AppName.sqlite";
    metadata =     {
        NSPersistenceFrameworkVersion = 519;
        NSStoreModelVersionHashes =         {
            Attempt = <b4d1e878 69a97917 e751a67c 89e1887a ae4df1dc f380e4ee c9585f60 f39ff51e>;
            BookmarkFlashcard = <33112f7c 2fa20bec eb2e019c b5d619b4 92be2547 a65fabee 1ac86ab7 92dd77bb>;
            BookmarkQuestion = <38634b49 71f0d43c 6f9fbba9 bc2f1b81 675c9b3c f2da017e fc8de9d8 4e18a4a0>;
            Category = <b0e4d91b 0c0ebc71 ed0f403c 9a0eec20 fc1686aa 0169bc60 4bcc7e57 165bce15>;
        };
        NSStoreModelVersionHashesVersion = 3;
        NSStoreModelVersionIdentifiers =         (
            ""
        );
        NSStoreType = SQLite;
        NSStoreUUID = "F1B37CD0-8B89-4893-A262-1013C3544026";
        "_NSAutoVacuumLevel" = 2;
    };
    reason = "Can't find model for source store"; } 2015-07-28 09:04:06.089 AppName[51306:1423128] CoreData: annotation:
NSPersistentStoreCoordinator's current model hashes are {
    Attempt = <b4d1e878 69a97917 e751a67c 89e1887a ae4df1dc f380e4ee c9585f60 f39ff51e>;
    BookmarkFlashcard = <33112f7c 2fa20bec eb2e019c b5d619b4 92be2547 a65fabee 1ac86ab7 92dd77bb>;
    BookmarkQuestion = <38634b49 71f0d43c 6f9fbba9 bc2f1b81 675c9b3c f2da017e fc8de9d8 4e18a4a0>;
    Category = <b0e4d91b 0c0ebc71 ed0f403c 9a0eec20 fc1686aa 0169bc60 4bcc7e57 165bce15>; }

有没有办法在已生产的应用程序中将name1.xdatamodel重命名为name2.xdatamodel？

谢谢

Answer 1

您应该创建一个新的(allApps.xcdatamodeld),而不是重命名app1.xcdatamodeld或app2.xcdatamodeld.这个新模型可以只是您想要保留的模型的副本.

然后在两个目标中的每一个中添加.xcmappingmodel文件并将其链接到allApps.xcdatamodeld并执行所需的任何翻译.

coreData的工作方式,你需要保留原来的app1和app2 xcdatamodeld文件,以确保你永远不会破坏碰巧让你的最老的应用程序仍然在他们的设备上运行的用户.

文件>新建>文件>核心数据>映射模型.选择源模型,然后单击"下一步".

选择Target数据模型,然后单击Next.

在app2的另一个目标中再次执行此操作,您应该没问题.