将CoreData添加到现有项目 [英] Adding CoreData to existing Project

问题描述

我试图添加CoreData到现有项目和
有奇怪的错误...

我得到错误：

由于未捕获的异常而终止应用程序
'NSInvalidArgumentException'，原因：
'无法创建
NSPersistentStoreCoordinator $ b nil模型'

在RootView中有一个警告：

   - （NSFetchedResultsController *）fetchedResultsController; 
  

：

  _fetchedResultsController.delegate = self; 
  

并说：

警告：class'RootViewController'
不实施
'NSFetchedResultsControllerDelegate'
协议

$ b

任何想法？

甚至问我，我只是错过了，我改变了.xcdatamodel的名称

我只需要更改managedObjectModel和persistentStoreCoordinator中的名称

希望它能帮助别人。

I am trying to add CoreData to an existing project and there is strange error...

I get the error:

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Cannot create an NSPersistentStoreCoordinator with a nil model'

in RootView there is a warning in:

- (NSFetchedResultsController *)fetchedResultsController;

in line:

_fetchedResultsController.delegate = self;

and it says:

warning: class 'RootViewController' does not implement the 'NSFetchedResultsControllerDelegate' protocol

any ideas?

解决方案

argh!

sorry for even asking, I just missed that I changed the name of .xcdatamodel

I needed just to change the name in managedObjectModel and persistentStoreCoordinator

hope it'll help someone anyway.

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