xcode 核心数据 - 如何生成 CoreDataGeneratedAccessors？
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Core Data - how to generate CoreDataGeneratedAccessors?
提问by Krishna
I've gone through apple dev website, google and stack overflow to figure out the basics behind CoreDataGeneratedAccessors.
我浏览了苹果开发网站、谷歌和堆栈溢出，以了解 CoreDataGeneratedAccessors 背后的基础知识。
I'm using Xcode 4.2 and core data. I created entities and their relationships properly including inverse.
我正在使用 Xcode 4.2 和核心数据。我正确地创建了实体及其关系，包括逆。
Following code is failing:
以下代码失败：
self.remdetail = [NSEntityDescription insertNewObjectForEntityForName:@"RemDetail" inManagedObjectContext:context];
[rem addRemDetailObject:remdetail]; --> I'm trying to add rem detail to rem object
because there are no accessor methods generated automatically, I put the following code manually in one of the NSManagedObject subclass. The following code was not generated when i created NSManagedObjects for my entities. I tried to generate accessors automatically by going through few articles and suggestions like Xcode copy & paste etc but nothing is generating the following code.
因为没有自动生成的访问器方法，我将以下代码手动放在 NSManagedObject 子类之一中。当我为我的实体创建 NSManagedObjects 时，没有生成以下代码。我试图通过阅读一些文章和建议（例如 Xcode 复制和粘贴等）来自动生成访问器，但没有生成以下代码。
in rem ManagedObject -->
在 rem ManagedObject -->
@interface Rem (CoreDataGeneratedAccessors)
- (void)addRemDetailObject:(RemDetail *)value;
- (void)removeRemDetailObject:(RemDetail *)value;
- (void)addRemDetail:(RemDetail *)value;
- (void)removeRemDetail:(RemDetail *)value;
@end
does anyone know how to generate CoreDataGeneratedAccessors?
有谁知道如何生成 CoreDataGeneratedAccessors？
Thanks, Rama
谢谢，拉玛
回答by Julien
Have you checked the switch "To-Many Relationship" in the relationship properties?
您是否检查了关系属性中的“对多关系”开关？
回答by Cloud9999Strife
@Julien's answer was part of the solution, but here is how I solved it:
@Julien 的回答是解决方案的一部分，但我是这样解决的：
- Make sure that you have a to-many relationship.
- If you already made a class for your entity, delete it, then with your xcdatamodel open, go to Editor -> create NSManagedObject subclass, and follow the wizard.
- 确保您有一对多的关系。
- 如果你已经为你的实体创建了一个类，删除它，然后打开你的 xcdatamodel，转到 Editor -> create NSManagedObject subclass，然后按照向导操作。
The class that is generated will have CoreDataGeneratedAccessorsthat you are looking for.
生成的类将具有CoreDataGeneratedAccessors您正在寻找的类。
回答by TheEye
Have a look here:
看看这里：
https://github.com/rentzsch/mogenerator
https://github.com/rentzsch/mogenerator
This little tool will generate the accessor classes for you - I use it in quite some projects and it works great!
这个小工具将为您生成访问器类 - 我在很多项目中使用它并且效果很好！
回答by Binoy jose
1)created a new version of the Core Data Model via Xcode.
1）通过Xcode创建了一个新版本的核心数据模型。
2)Fix the relationship (added a new relationship between the two.https://developer.apple.com/library/watchos/documentation/Cocoa/Conceptual/CoreData/HowManagedObjectsarerelated.html)
2）修复关系（新增了两者之间的关系。https://developer.apple.com/library/watchos/documentation/Cocoa/Conceptual/CoreData/HowManagedObjectsarerelated.html）
3)re-created the NSManagedObject subclass
3) 重新创建了 NSManagedObject 子类
