I have an App that I am trying to design the data model for. I am using core data (my first App to do so).
My app shipped with data model 1.I just created a data model 2 and tested on my device and it migrated fine.I just noticed that I made a mistake with开发者_如何学运维 the attribute so I need to create
Say I have a custom NSManagedObject Department and this has a property representing a to-many relationship to employees i.e. NSSet *employees;.
Suppose I have a Core Data model with an abstract entity called \"Animal.\" Then, I have many other entities that inherit from this abstract entity: \"Lion\", \"Dog\", \"Cat\", etc. (I\'m not developi
I had a crash while executing executeFetchRequest:error: MyApp[595] has active assertions beyond permitted time:
I have got this background thread that does a few things with core data objects. I get the context as follows:
I am going through my 8th version of the iphone d开发者_JAVA百科atamodel, and this is over the span of months, so improvements come along and changes have to be made. I was wondering if there is a lim
This is my first project which I\'ve encountered that I can\'t get by on NSUserDefaults peppered with some NSCoding protocol. I\'ve been asked to write some POS software.
I have a project that uses coredata and i am attmepting to delete from what i have stored. But i keep getting this error.
What technical reasons are there not to make a singleton class to manage my Core Data? I\'m trying to make a decis开发者_运维问答ion now, if I should strip out all of the boilerplate core data code an
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