BackgroundDownload. 支持后台下载，性能稳定，封装的NSURLSession，审核应该能过，项目中还没改。（注意：由于没限定条件，开始按钮最好只按一次，不然就多个同时下载了！！！进度条会紊乱的，点击开始，然后直接锁屏，下完就会通知你的，还有就是打开系统通知是iOS8之后的，注意适配哦）伙伴们还是多用系统底层的接口，自己封装，多动手。自己创建项目的时候记得在infoplist添加后台下载的key

Problem

The full read on this project is a sign-in away — what it solves, who it serves, and where it sits in the market.

Audience

The full read on this project is a sign-in away — what it solves, who it serves, and where it sits in the market.

Market

The full read on this project is a sign-in away — what it solves, who it serves, and where it sits in the market.

Pricing

The full read on this project is a sign-in away — what it solves, who it serves, and where it sits in the market.