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In the chapter entitled [[Working with Directories on iPhone OS]] 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 based applications. We also spent some time covering the file system structure used by the iPhone OS and in particular looked at the temporary and Documents directory directories assigned to each application and how the location of those directories can be identified from with the application code.
In this chapter we move on from working with directories to covering the details of working with files on the iPhone OS using all three of these classes. Once we have covered file handling topics in this chapter, the next chapter, will work through a simple iPhone application example that puts theory into practice.
