iOS app crashed when downloading background

Job ID: 33936072

Budget: $250 – $750 USD

When running the iOS app, user needs to download the manual file in HTML format.

In this process,

- if the screen is turned off or the window is closed or changed front app,

Our iOS App is interrupted and an error occurs.

It needs to be bug fixed so that it downloads continuously in the background without errors.

- before start talking about the project, pls give your opinion root cause of the errors
Related categories: Mobile App Development iPhone Objective C iPad Swift