'+ entityForName：nil不是用于搜索实体名称的合法NSPersistentStoreCoordinator [英] '+entityForName: nil is not a legal NSPersistentStoreCoordinator for searching for entity name

问题描述

在使用_managedObjectModel时，稍后在程序中获取异常。以下是初始化代码。

  NSURL * modelURL = [[NSBundle mainBundle] URLForResource：self.managedObjectModelName withExtension：@momd]; 
 _managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL：modelURL]; 
  

问题是_managedObjectModel指向一个垃圾内存位置。
在分析GPR和汇编代码之后，我发现ManagedObjectModel被正确初始化，但是当模式的内容被加载到其中时 - 对象指针在对象之前的开始指向随机位置，或者在对象之间的某处对象的分配内存。

如果我尝试使用这样的东西来访问底层内容：[_managedObjectModel - > _ entities allKeys]，我得到模式中的所有键。

有没有人遇到这样的问题？

这可能类似于 https://github.com/typhoon-framework/Typhoon/issues/138

解决方案

self.managedObjectModelName与数据模型名称相同？

我猜这里有一些问题在名称本身。 / p>

Getting the exception later in the program when _managedObjectModel is being used. Below is initialiser code.

 NSURL *modelURL = [[NSBundle mainBundle] URLForResource:self.managedObjectModelName withExtension:@"momd"];
_managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL];

The problem is that _managedObjectModel is pointing to a garbage memory location. After analysing GPR and assembly code i found that the ManagedObjectModel was being initialised properly but, when the content from schema is being loaded into it - the object pointer starts pointing at random locations way before the object is, or somewhere in between the object's allocated memory.

If i try to access underlying content using something like this : [_managedObjectModel->_entities allKeys], i do get all the keys in schema.

Has anyone ever faced such issues ?

This is probably something similar to https://github.com/typhoon-framework/Typhoon/issues/138

解决方案

self.managedObjectModelName is same as your data model name?

I guess some where here is problem in names itself.

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