Скачать или смотреть How to Change File Names in the Document Folder Using Swift with NSFileManager

A step-by-step guide on how to effectively rename files in the Document Directory using Swift and `NSFileManager`.
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How to Change File Names in the Document Folder Using Swift

Renaming files within your app's document directory can often be a crucial yet daunting task, especially for iOS developers. If you have multiple files that follow a specific naming convention, such as "data_20201223163209.pdf", and you want to modify their names, this guide will guide you through the process of using Swift's NSFileManager to make those changes easily.

The Problem at Hand

Let's say you have a series of files in your app's document directory saved with the prefix "data_". For instance:

data_20201223163209.pdf

data_20201223171831.pdf

data_20201222171831.pdf

data_20201221171831.pdf

Your goal is to rename all these files by replacing the "data" prefix with "newdata", resulting in filenames like:

newdata_20201223163209.pdf

newdata_20201223171831.pdf

newdata_20201222171831.pdf

newdata_20201221171831.pdf

The Solution

To achieve this, you will need to utilize the FileManager class provided by Swift. Below is a step-by-step breakdown of the process:

Step 1: Access the Document Directory

First, you need to get the URL of the Document Directory in your app, which will allow you to access the files stored there:

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Step 2: Retrieve the File Names

Now that you have access to the Document Directory, the next step is to retrieve all the contents (file names) of that directory:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Filter and Iterate Through the Files

Once you've obtained the list of files, filter out those that start with "data_":

[[See Video to Reveal this Text or Code Snippet]]

Step 4: Rename the Files

In this next part, you will iterate through each of the filtered files and rename them by constructing a new file URL:

[[See Video to Reveal this Text or Code Snippet]]

Full Code Example

Putting all the parts together, your complete Swift function to rename the files in the Document Directory would look like this:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

Renaming files programmatically in Swift using NSFileManager is a straightforward task if approached systematically. By following the steps outlined above, you can effectively change file names in your document folder, making your application's file management more intuitive and user-friendly.

This method ensures that it checks for existing filenames and prevents overwriting, providing a reliable solution for renaming files in your app.

Feel free to adjust the prefixes as needed for your specific use case and dive into the world of Swift file management!