download more than 4000 Contacts details from Salesforce.com to iPhone

I am trying to download more than 4000 contacts from Salesforce.com. I go through al开发者_如何学运维l the API available for iPhone/iPad development. I use the zkSforce Classes provided for the iPhone/iPad application development. Still i didn't find any proper solution for the same.So guys please help me out.

You need to use the queryMore method on ZKForceClient, first run query and the returned ZKQueryResult object will contain your first 1000 records, and if there are more than that on Salesforce it will contain a BOOL set to NO, the BOOL is named done, check that condition, if it is NO then there will be an NSString in queryLocator. You will use this string to pass to queryMore which also returns a ZKQueryResult object that you can use to repeat this pattern.

For info on queryLocator check out the documentation, http://www.salesforce.com/us/developer/docs/api/Content/sforce_api_calls_querymore_querylocator.htm

Salesforce is providing mobile SDK using REST.

Check this following link, that helps you where to start with.

https://stackoverflow.com/a/14154863/299662