nsentitydescription

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How to get an entity out of a NSEntityDescription

I have a NSTreeController (treeController) and a CoreData database. I want the entity behind the selected object of my NSTreeController.[详细]

2023-03-26 07:27 分类：问答
Checking for duplicate in sqlite before inserting them (Core data)

i\'m inserting new objects into the database by core data. Is there any way to check if there is any duplicate in the database before i insert the values in?[详细]

2023-03-24 22:35 分类：问答
casting object of type id to to an unknown type at runtime

I have a method that takes as a string the name of an entity in my sqlite database that I am trying to streamline to use as little repeating code as possible.[详细]

2023-03-17 04:06 分类：问答
ios - core data: Why does "Entity name must not be nil" sometimes occur?

hey folks. i am writing an ios-app, that contains severals subviews, which can be individually created by a touch of a button. every subview has an instance of \'group\', that is an entity saved via c[详细]

2023-02-23 17:07 分类：问答
Why are NSManagedObject and NSEntityDescription separate classes?

It seems that an NSEntityDescription object describes data and an NSManagedObject object contains the corresponding data. If you have a normal NSObject subclass, the description of the data and the ac[详细]

2023-02-20 13:02 分类：问答
iPhone - Core Data Question?

I have 2 entities : User, Address. I have set the relationship each User can have many \"Address\". I am not sure how core data works but from my understanding, every time i call insertEntityForName i[详细]

2023-01-20 02:12 分类：问答
少年锦衣卫是谁画的啊？？

M40****638 2022-04-28 21:33 开发者_高级运维姓段，名云，生于二十世纪末，是一名不折不扣的热武器天才，十五岁被美国陆军军官学校——西点军校破格吸收，后担任伏龙芝军事学院的荣誉学生会主~席，桑赫斯特皇[详细]

2022-12-23 11:21 分类：问答