save file in iPhone

Download and Save File in iPhone by Swift

In a modern iPhone app, a smooth user experience is quite important. To achieve this, caching the internet resources to local is a good approach. Therefore, to make the app more smoothly when users open it, downloading images and videos and saving them locally will quite improve the app starting speed. In the last tutorial, I have demonstrated how to download files by Swift 5 and watch the download status such as progress. The downloading task is controlled by 3 buttons: a start button to start, a pause button to pause and resume, a stop button to stop. In this tutorial, I will show how to save the downloaded file in local and open it by default in the iPhone. The whole tutorial is developed under the latest Swift.

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