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UIManaged Document

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UIManagedDocument Class Reference. Overview UIManagedDocument is a concrete subclass of UIDocument that integrates with Core Data.

UIManagedDocument Class Reference

When you initialize a managed document, you specify the URL for the document location. The document object then creates a Core Data stack to use to access the document’s persistent store using a managed object model from the application’s main bundle. See “Supporting Document-Based Apps in iCloud” in iCloud Programming Guide for Core Data for implementation strategies and troubleshooting steps. UIManagedDocument performs all the basic set-up you need for Core Data, and in some cases you may use instances of UIManagedDocument directly (without a need to subclass).

Override persistentStoreName to customize the name of the persistent store file inside the document’s file package.Override managedObjectModel to customize creation of the managed object model.You do this if, for example, your application supports multiple document types, each of which uses a different model. Handling Errors Properties. Synchronize Core Data with a Web Service - Part 1 - Ray Wenderlich.

Learn how to synchronize Core Data with a web service!

Synchronize Core Data with a Web Service - Part 1 - Ray Wenderlich

This is a post by iOS Tutorial Team Member Chris Wagner, an enthusiast in software engineering always trying to stay ahead of the curve. You can also find him on Google+. A lot of apps that store their data in a remote database only work when an Internet connection is available. Think about Twitter or Facebook – without an Internet connection, they don’t do much! But it’s a much nicer (and faster) user experience if your app can work even without an Internet connection. The idea is you create a local cache of your data so you can access it whether the user is online or offline. In this tutorial, you’ll learn how to do exactly that.

This tutorial assumes you have basic familiarity with Core Data and web services. So let’s get synchronized… 3, 2, 1, let’s go! Core data - iOS UIManagedDocument : can't open pre loaded persistent store. Iphone - Pre-load core data database in iOS 5 with UIManagedDocument. Objective c - UIManagedDocument not saving. Compiled » Blog Archive » UIManagedDocument autosave troubleshooting. I’d been having some trouble with UIManagedDocument that turned out to be my fault, but it wasn’t easy to figure out.

Compiled » Blog Archive » UIManagedDocument autosave troubleshooting

In the end there were a couple of things that helped me figure out what was going on, so I’m posting them here in the hopes that I’ll save someone else some time. UIManagedDocument is a UIDocument subclass which stores document data in a Core Data database. UIDocument is a class that manages document storage for you, but provides some great features like iCloud integration and automatic saving. It’s the automatic saving that I was having trouble with. I would create my UIManagedDocument subclass, create a new document, populate it, and all seemed well. Core Data is fairly well documented, and the process of creating a UIManagedDocument is also well documented, so I’m not going to post a whole walkthrough here. The first thing I found useful was to subclass UIManagedDocument, and add an override: The other thing you need to know is when errors happen.

Document-Based App Programming Guide for iOS: About Document-Based Applications in iOS. The UIKit framework offers support for applications that manage multiple documents, with each document containing a unique set of data that is stored in a file located either in the application sandbox or in iCloud.

Document-Based App Programming Guide for iOS: About Document-Based Applications in iOS

Central to this support is the UIDocument class, introduced in iOS 5.0. A document-based application must create a subclass of UIDocument that loads document data into its in-memory data structures and supplies UIDocument with the data to write to the document file. UIDocument takes care of many details related to document management for you. Besides its integration with iCloud, UIDocument reads and writes document data in the background so that your application’s user interface does not become unresponsive during these operations.

It also saves document data automatically and periodically, freeing your users from the need to explicitly save.

Best Examples

An iOS 7 Core Data Tutorial. From Techotopia In the previous chapter, entitled Working with iOS 7 Databases using Core Data, an overview of the Core Data stack was provided, together with details of how to write code to implement data persistence using this infrastructure.

An iOS 7 Core Data Tutorial

In this chapter we will continue to look at Core Data in the form of a step by step tutorial that implements data persistence using Core Data in an iOS 7 application. [edit] The Core Data Example Application The application developed in this chapter will take the form of the same contact database application used in previous chapters, the objective being to allow the user to enter name, address and phone number information into a database and then search for specific contacts based on the contact’s name.

[edit] Creating a Core Data based Application As is often the case, we can rely on Xcode to do much of the preparatory work for us when developing an iOS application that will use Core Data. [edit] Creating the Entity Description Figure 42-1. How to View a SQLite3 Database on an iPhone. Introduction to Core Data - Jason Shapiro. Core Data with a Single Shared UIManagedDocument. Note: This post is a bit out of date these days and I'd now recommend using a "standard" Core Data stack over UIManagedDocument whether you're planning on using iCloud or not.

Core Data with a Single Shared UIManagedDocument

Many of the Xcode templates come with a basic Core Data setup to help you get started. I've also put together a very small library, a Core Data In-A-Box if you will, you might also find useful. UIManagedDocument is a great way to set up a Core Data stack for your application. It's also the best way to enable iCloud support for your Core Data applications. For applications with a single view controller as the entry point, setting up the document and passing it on to subsequent view controllers works great. While re-writing an existing app to use many of the new features in iOS 5, I ran into this very issue. Blech. One thing I really like about writing apps for iOS 5 is how little the application delegate is responsible for now.

There. Looking inside: Pretty simple. UIManagedDocument with Core Data by Alondo Brewington. Ios - Could not create UIManagedDocument.