You typically read/write app files in a few designated directories, like your app’s document directory or from the app bundle.Files on iOS have a path, but you usually only work with a URL object that contains that path.
Apps on iOS are constrained to a sandbox, which means they’ve got no access to system files and resources.Working with files on iOS is different in a few ways: You can access any file through its path, something like /home/reinder/Documents/todo-list.txt, provided you’ve got permission to access that file.
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If you’ve worked with files before, on your Mac for example, you’re well aware of how files are organized in a file system that consists of hierarchical directories. Working with FileManager, when building your iOS app, can be a bit counter-intuitive. You can also use FileManager to work with directories. You can then use that path to read the file, or write to it, depending on your app’s needs. In short, you use FileManager to get the path of files on the iPhone that your iOS app has access to. You use it to read from and write to files in your iOS app. The FileManager component, for iOS development, is an interface to the iPhone’s file system.
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