Error when iPhone is with locked screen

[vadimux]

Hi, I use official Objective-C SDK for the Dropbox API v2 with my app for iOS.

So, there is very interesting behavior - when I try to upload my huge files on Dropbox and at that moment I lock screen of my iphone (not "Home" button) - I get error from server-side "The network connection was lost" (-1005) and internal SDK error isClientError. As result my file isn't on Dropbox.

Any ideas about this case?

[vadimux · Accepted solution]

I guess there is the answer for my question - https://www.dropboxforum.com/t5/API-support/Dropbox-iOS-Core-SDK-How-to-continue-downloads-in-backgr...

[Greg-DB]

That thread is regarding an older, retired Dropbox iOS SDK. For the current Dropbox Objective-C SDK, please refer to the documentation here for information on background sessions:

https://github.com/dropbox/dropbox-sdk-obj-c#note-about-background-sessions