When using SwiftUI to create a document based app, the default document type is to subclass FileDocument. All examples lead to simple value types to be used in this document type. I'm looking to cr...

I am trying to open a managed document using openWithCompletionHandler: The problem I am coming across is that it works fine on the simulator, but when I test it on my iPhone 4 the completion hand...

I've got an old app that uses UIManagedDocument to interact with Core Data. However on iOS 11.2 (and possibly earlier iOS 11 point releases) the saveToURL:forSaveOperation:completionHandler: method...

I'm using UIManagedDocument to manage my data. I create the model and use it, and everything seems to be working, but my changes aren't being written back to the SQLite store. The documentation fo...

I'm running an UIMA application on apache spark. There are million of pages coming into batches to be processed by UIMA RUTA for calculation. But some time i'm facing out of memory exception.It thr...

I am in the process of re-releasing my iPhone app and now an executeFetchRequest on my UIManagedDocument gets an SQLite error code:6922. I have searched the internet and there is no SQLite error co...

I am working on my first "iCloud App". I worked through the Apple docs and the Stanford videos but I am still struggling to understand the "Big picture" of iCloud. My goal is to create a "Library...

I have been trying very unsuccessfully to create a simple UIManagedDocument library style application (separate documents saved to iCloud). I am confused with the following: Do I subclass UIManag...

Apple documentation says we need to register for NSUbiquityIdentityDidChangeNotification and to compare the current iCloud token with the one previously stored in NSUserDefaults to detect if a user...

I was taking a look at WWDC 2013 sessions concerning iCloud and Core Data. I was really hoping to see there any new videos for UIManagedDocument or UIDocument. You might remember that those classes...

I'm preparing an update for a Core Data based app for fixes with iOS 7. I use Xcode 5 and iOS 7 SDK GM. However I realized a different behavior of the persistent store (which is a UIManagedDocument...

I started using CoreData in my application following Stanford CS193P lessons regarding the use of iOS 5's new class UIManagedDocument. The approach itself is quite straightforward but I can't under...

When I try to save a newly created UIManagedDocument to iCloud and the network is down (e.g. airplane mode) I get the following error(s) with a crash (hexcodes and unreadable stuff removed): -[PFU...

I have found these Stanford tutorials https://itunes.apple.com/us/course/ipad-iphone-app-development/id495052415, and have been listening a lecture about core data, which is really great. It shows...

I'm trying to pre load a persistent store in an app based on UIManagedDocument to deal with core data. Persistent store I try to use in app B, is "generated" and populated thanks to app A. In both...

I have a very weird problem I've spent the last two days trying to solve... I had a piece of code that was working perfectly fine on Xcode 4.4 and iOS 5.1 Simulator, using the 5.1 SDK. After I upda...

This is my first question on Stack Overflow, so please excuse me if I'm breaking any etiquette. I'm also fairly new to Objective-C/app creation. I have been following the CS193P Stanford course, i...

Got a Stumper (at least for me). I am using iOS 5.0 w/ ARC, and Core Data inside of UIManagedDocument. I have an Entity (Group) with a to-many relationship (called people) to entity (Person). Whe...