Core data MagicalRecord saveWithBlock崩溃

我尝试在iOS 7设备上运行此代码（实际上它在模拟器上运行得很好） 我使用MR 2.2并使用mogenerator生成核心数据类

[MagicalRecord saveWithBlock:^(NSManagedObjectContext *localContext){

            NewsEntity *newsEntity = [NewsEntity MR_createInContext:localContext];
        newsEntity.newsId = jsonObject[@"News_Id"];

    }
    completion:^(BOOL success, NSError *error){
        if (!success || nil != error)
        {
          NSLog(@"MagicalRecord saveWithBlock error: %@", error.description);
        }
        else
        {
            [self updateUI];
        }
    }];

我在这行代码上有个例外

NewsEntity *newsEntity = [NewsEntity MR_createInContext:localContext];

看起来是这样的

* thread #5: tid = 0x31b342, 0x3aaafcc0 libobjc.A.dylib`objc_exception_throw, queue = 'NSManagedObjectContext Queue', stop reason = breakpoint 3.3
  * frame #0: 0x3aaafcc0 libobjc.A.dylib`objc_exception_throw
    frame #1: 0x2fd50030 CoreData`+[NSEntityDescription insertNewObjectForEntityForName:inManagedObjectContext:] + 204
    frame #2: 0x00053f02 TestApp`+[_NewsEntity insertInManagedObjectContext:](self=0x00be4480, _cmd=0x369db6dc, moc_=0x16789640) + 322 at _NewsEntity.m:28
    frame #3: 0x0014de3e TestApp`+[NSManagedObject(self=0x00be4480, _cmd=0x00975bb0, context=0x16789640) MR_createInContext:] + 138 at NSManagedObject+MagicalRecord.m:157
    frame #4: 0x00057df4 TestApp`__52-[NewsViewController saveDataToPersistentStorage:]_block_invoke(.block_descriptor=<unavailable>, localContext=0x16789640) + 472 at NewsViewController.m:115
    frame #5: 0x00144282 TestApp`__51+[MagicalRecord(.block_descriptor=<unavailable>) saveWithBlock:completion:]_block_invoke + 46 at MagicalRecord+Actions.m:28
    frame #6: 0x2fdaca70 

我只添加了[MagicalRecord setupAutoMigratingCoreDataStack]；给AppDelegate

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您能解决这个问题吗？

对不起，我忘了将核心数据模型添加到目标成员资格中

*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '+entityForName: could not locate an entity named 'NewsEntity' in this model.'