background - iOS: How to queue an upload when offline similar to email app -


i'm updating app didn't build have been working little while, keep in mind i'm new ios programming. app uploads work orders client server when completed using nsurlconnection, if has no connection queue them , wait connection upload. fine unless app backgrounded, times user forget open app complete upload.

apples email app doesn't have problem, complete uploads while app backgrounded if finds connection , notifies user whoosh sound. i'm not sure how done in background apple seems prevent actions when backgrounded. possible using nsurlconnection or need convert use nsurlsession or similar?

i don't see topic coming on google i'm wondering if point me in helpful direction. thanks!


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