Chapter 9. File Handling
WHAT YOU WILL LEARN IN THIS CHAPTER:
Where your applications are stored on the iPad
The various folders within your
How to read and write to files in the
How to use a property to store structured data
How to programmatically retrieve values stored in a property list
How to modify the values retrieved from a property list and save the changes to a file
How to copy bundled resources to the application's folder during runtime
All the applications you have developed up to this point are pretty straightforward — the application starts, performs something interesting, and ends. In Chapter 8, you saw how you can make use of the application settings feature to save the preferences of your application to a central location managed by the Settings application. Sometimes, however, you simply need to save some data to your application's folder for use later. For example, rather than keep files you download from a remote server in memory, a more effective and memory efficient method is to save them in a file so that you can use them later (even after the application has shut down and restarted).
In this chapter, you learn more about how you can persist data in your application so that you can use it later. You learn the two available approaches: saving the data as files and as a property list. You also learn how to bundle resources such as text files and database files with your application so that when the application is installed ...