Check In on facebook wall using facebook-ios-sdk for predefined list of address

I am working on an iPhone app, in which I have to enlist all nearby places and post its check in update on users facebook wall if he/she does so. As of now I made set up for Facebook SSO and I have my current latitude and longitude. I have address of all the place of my apps interest. I am stucked with two questions 1st one is how ca开发者_如何学JAVAn I show nearest of them and other near by suppose like 10 of them? and the 2nd one is how can I post it on facebook wall?

Regards, Sumit

this tutorial might help:

Facebook checkin for iOS tutorial