core-data

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Updating NSManagedObject subclass after updating data model

I had an original data model that was used to create NSManagedObject subclasses. I have now added custom code to these subclasses.[详细]

2023-04-12 04:34 分类：问答
SQLite Persistent Store as a cache

I\'ve got an idea to build custom Persistent Store that would basically work as a cache. I.e. objects that are available from local SQLite Store would be retrieved from it and those that are not avail[详细]

2023-04-12 03:42 分类：问答
Core Data creating NSPredicate for NSNumber using something akin to BEGINSWITH

I am trying to retrieve results from search bar text in Core Data on a pro开发者_如何学JAVAperty that is an NSNumber.[详细]

2023-04-12 02:22 分类：问答
How do I create an instance of my new entity as part of a core data migration?

We have an app with a versioned core data model, and we\'re setting the NSMigratePersistentStoresAutomaticallyOpt开发者_Go百科ion and NSInferMappingModelAutomaticallyOption options to handle the migra[详细]

2023-04-12 00:24 分类：问答
Problems With Core Data App-

When I try to build my Core Data App, which most code is coming from CoreDataBooks example, I get the error[详细]

2023-04-12 00:00 分类：问答
If an NSManagedObject subclassed object is an NSViewController's representedObject is it a fault?

in an NSViewController subclass this BOOL returns \"fault is (null)\" in the console: Submission *sub = [self representedObject];[详细]

2023-04-11 23:34 分类：问答
When is an NSFetchedResultsController updated?

I am using an NSFetchedResultsController that uses a predicate to fetch some managed objects. I have always assumed that the NSFetchedResultsController is updated when the开发者_StackOverflow中文版 ob[详细]

2023-04-11 23:08 分类：问答
Karaoke Music App

I want to create Karaoke type app. My app will take music from itunes and save it in sqlite database from application\'s document folder.Then[详细]

2023-04-11 22:30 分类：问答
iOS downloading files to the filesystem?

The iPad app that I\'m currently working on reads \".epub\" files from the Supporting fi开发者_运维知识库les directory within the iOS app. We are currently adding the ability to download arbitrary .ep[详细]

2023-04-11 21:46 分类：问答
Adding a 'level pack' to an existing iphone app

I\'m working on an iphone game that I plan to submit to the app store soon but there\'s one thing that I havent figured out yet. My game has multiples levels for the player to pass (obtaining scores a[详细]

2023-04-11 21:42 分类：问答