What is best Way to store data locally on iphone?

I am designing a web app that fetches data every time a user l开发者_运维问答ogs into his/her account. The data is an xml file containing image links and some text. I want this data (after image fetch/load from the actual link) to be stored locally so that every time an user opens the app it doesn't have to load everything from scratch. Locally stored contents should load first, then in the background some network processing shall be done so that the newer data is automatically updated. For storing the data I am planning to use SQLite but is there any other efficient way other than this to do the same ?

How does facebook app do this kind of stuff ? Thank you so much

The Facebook app is not really a web app but rather a native Cocoa Touch app.

If you are really creating a web app, your only option is to use localstorage and fetching new data asynchronously using XMLHTTPRequest.

If – on the other hand – your app is a native app, you’ll most likely want to use Core Data for storage and get incremental updates in a separate thread (or using libdispatch in case you’re only targetting post 4.0 devices) using a separate managed object context which you can then merge to the main thread using mergeChangesFromContextDidSaveNotification:.