Overview: This project use fileManager to save large data like image, video, radio downloaded from internet

Features included:

1. download file by tap download button
2. shows download status on screen
3. when downloading complete, show "download complete" message
4. save downloaded data into file system
5. move file to target url address
6. tap play video to play the music we just downloaded

framework used :

1. UIKit
2. AVKit
3. AVFoundation
4. Foundation

Objective-C version: https://www.youtube.com/watch?v=QqYqwqLylM4