iOS application update system

I'm new to iOS development. And i can't find an answer to a question how does application update system work. I want to write a game which will have a set of levels. Then i want to be able to add new levels to the game (after it was uploaded into app store). So my game should be updated. And i don't开发者_JAVA百科 understand how to do this.

In any case you need to make any change in the code, you will need to prepare a new submission build with version number greater than the previous submitted one and then submit to app store through iTunes Connect. This will go through the Apple review process again.

If you don't need to update your code, say levels are stored as xml files, a database etc., you don't need to go through the store. You could simply check with some (= your) server whether there is updated content available and download that to the device.