Working in background in iOS

Question

I'm an android developer and I've started learning iOS development - not so long ago. I have
an android app which I want to port onto iOS. My app has
a background service which tracks user geoLocation and sends it to my server then receives response from it and then writes this response to SQLLite, please tell me how much it is possible to make this on iOS? I know that iPhone can receive location updates in background since iOS4, but what about background network connections and SQLLite? Also is it possible to send local push notifications in background?

Answer 1

please tell me how much it is possible to make this on iOS?

iOS is a mature OS that comes with Cocoa Touch, a huge library of classes. So, yes it is possible. And the question of possibility shouldn't be attached with the word much. Either something is possible, or something is impossible. Don't take it as how much. If it is possible, you can do it.

how about background network connections and SQLite?

Of course, this is possible. Like android, there is a rule in iOS that only your main thread can interact with the UI, and all other heavy tasks should be attached with other threads. You will use Blocks to accomplish this kind of functionality.

Also is it possible to send local push notifications in background?

Yes, it is quite possible. Have a look at the following document.

Local and Push Notification Programming Guide

Do have a look at http://developer.apple.com/, here you find a lot of documents related to the tasks you have asked in your question.