how to view file types in documents app foe ios

Most importantly, what is the best format of document data for your application, and how can you make that format work for your application in iOS and Mac OS X? What is the most appropriate document type? Relevant Chapter: Designing a Document-Based Application When Designing an Application, Consider Document-Data Format and Other Issuesīefore you write a line of code you should consider aspects of design specific to document-based applications. A document object, in turn, is typically managed by a view controller that presents a document to users. A document object manages the data associated with a document, specifically the model objects that internally represent what the user is viewing and editing. In the Model-View-Controller design pattern, document objects-that is, instances of subclasses of UIDocument-are model controllers. At a GlanceĪlthough a document-based application is responsible for a range of behaviors, making an application document-based is usually not a difficult task. It also saves document data automatically and periodically, freeing your users from the need to explicitly save. 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. UIDocument takes care of many details related to document management for you. 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. 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.Ĭentral to this support is the UIDocument class, introduced in iOS 5.0. Next About Document-Based Applications in iOS

How to view file types in documents app foe ios