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In the chapter entitled [[Working with Directories on iOS 4 (Xcode 4)|Working with Directories on iOS 4]]we looked at the NSFileManager, NSFileHandle and NSData Foundation Framework classes and discussed how the NSFileManager class in particular enables us to work with directories when developing iPhone iOS 4 based applications. We also spent some time covering the file system structure used by the iOS and, in particular, looked at the temporary and Documents directories assigned to each application and how the location of those directories can be identified from within the application code.
In this chapter we move on from working with directories to covering the details of working with files within iOS 4 iPhone applications. Once we have covered file handling topics in this chapter, the next chapter will work through an application example that puts theory into practice.