扩展Core Data生成的NSManagedObject类 [英] Extending Core Data generated NSManagedObject classes
问题描述
我第一次处理Core Data，我想知道扩展Xcode为NSManagedObject实体生成的类的最佳做法。
I've been dealing with Core Data for the first time and I wanted to know what the best practices are for extending the classes that Xcode generates for my NSManagedObject entities.
我看到 mogenerator ，我也使用类似的方法， a href =http://www.cimgf.com/2011/03/13/super-happy-easy-fetching-in-core-data/ =nofollow>在内核数据中超级快速容易化< a>。
所以我有三种类：
I saw mogenerator and I've been also using a similar approach to that as suggested in SUPER HAPPY EASY FETCHING IN CORE DATA. So I had three kinds of classes:
- EasyFetching类别（只有一个类）;
- 生成的NSManagedObject子类（即：_Entity）;
- 一些自定义子类，包含查找所有非活动对象，清除对象的缓存等自定义方法：Entity）。
这种方法让我做一些自定义代码，而我可以重构我的Core Data实体并生成它多次我需要。但是我也遇到了一些问题，如不能为我的实体声明对象级方法（因为NSManagedObjectContext只知道我的_Entity类）。
This approach let me do some custom code while I could refactor my Core Data entity and generate it as many times as I needed. But I've also run into some problems like not being able to declare object level methods for my entities (because the NSManagedObjectContext only knew my _Entity classes).
m使用类别来扩展我的实体功能。这工作得更好，因为我可以有自定义对象级别的方法。我现在有三种类：
Now I'm using categories to extend my entities functionalities. And this works a lot better because I can have custom object level methods. I now have three kinds of classes:
- EasyFetching类（因为它有很多方法，所有我的自定义代码使用） / li>
- 生成的NSManagedObject子类（即：Entity）;
- 我的NSManagedObject实体的自定义类别（即：Entity + Custom.h） li>
- The EasyFetching category (as it has a lot of methods that all my custom code uses);
- A generated NSManagedObject subclass (i.e.: Entity);
- A custom category for my NSManagedObject entity (i.e.: Entity+Custom.h).
我的问题是：您会推荐什么？
My question is: what would you recommend?
答案
推荐答案
现在您已将问题作为答案发布在我的问题，
我想我应该回答你的问题：）
Now that you have posted your question as an answer on my question, I thought I should answer your question :)
Mogenerator看起来不好看，试试看。
Mogenerator doesn't look bad, give it a try.
你建议的类别也是一个很好的选择。
Also the way you suggested with categories is also a fine option.
Infact这里是 link ，正确解释了如何这样做。
Infact here is a link that exactly explains How to do so.
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