Download Files using URLSessionDownloadTask in Swift

Updated 12 February 2025

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Hi readers, today in our swift learning journey we will learn about Download Files using URLSessionDownloadTask in Swift.

Download Files using URLSessionDownloadTask in Swift

In today’s interconnected world, downloading files is most common and necessary feature for many applications.

Even if it is fetching images, documents, or any other media, efficient file downloading is crucial for the seamless user experience.

In Swift, there are many ways to download the file but in this blog we will be using URLSessionDownloadTask for the purpose.

URLSessionDownloadTask is a powerful tool for managing file downloads in swift.

Download Files using URLSessionDownloadTask

To initiate the download though the URLSession, you need to setup the URL Session for your application.

You can follow the below steps to integrate the URLSessionDownloadTask in your swift application.

Creating an object of  URLSession

Create an objectĀ ofĀ  URLSession which you have to config the identifier usingĀ URLSessionConfiguration.

After makeĀ isDiscretionaryĀ true so that we willĀ enable downloading with performance in the background state.

After that pass the URL from which you want to download the using downloadTask method of URL session class.

Once you pass the URL, the file downloading will start to track the download data likes.

totalBytesExpectedToWrite,Ā totalBytesWritten from that you can calculate how much data is downloaded with this delegate method.

Once your file is downloaded you can save in directory of your app.

In the case user put your application in background mode then handleEventsForBackgroundURLSession method call of the app delegate class.

Once downloading is completed in background state then you have to update the view in the main thread

Conclusion

With this, we have learned about how we can download Files using URLSessionDownloadTask in Swift and how we can effectively use these in our daily programming practice.

You can continue your learning journey with more interesting topics and technologies with the Mobikul Blog.

You can also check ourĀ Flutter Development Services.

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