The Jungle, Part 8: Basic Data Persistence

Persistence is the ability to save files and content to disk, so that you can read it out later and be able to save stuff. Most apps use persistence of some sort; even if your app doesn't create files, you may still have settings and configurations you want to save. iOS provides a number of formats to save different types of data. These include user defaults, property lists (plist), archived objects, text files, XML, SQL databases, and Core Data. In this post, we'll talk about the first four formats. XML will be covered in a separate extension, as it uses additional software beyond the standard SDK, and Core Data is complex enough to be the subject of its own post. With the power and flexibility that Core Data provides, there is little need for standard SQL databases, and so we will not cover it here; there are many good tutorials on SQL on the Internet. Let's get started. Building the App Open Xcode, create a new Single View Application, and call it "Persistence". Make sure to not use storyboards; that's a topic for another post.

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Objective-C,Series,Data,iOS,Persistence,Plist