How to retrieve users wall value in facebook api

I am integrating facebook api in my application and this is running well. I can login and able to post text on wall. But now I want to show all my wall text in application. I am writing below query but this is showing only that wall posted which is posted by this application.

NSString *fql = [NSString stringWithFormat:@"SELECT actor_id, message FROM stream WHERE source_id = %lld  limit 50",_session.uid];


NSDictionary* params = [NSDictio开发者_StackOverflownary dictionaryWithObject:fql forKey:@"query"];

[[FBRequest requestWithDelegate:self] call:@"facebook.fql.query" params:params];

How will I show posted wall value in application?

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Don't know Objective C and the SDK for it, but the graph url would be

https://graph.facebook.com/me/feed

You have to transmit a valid access_token. See Profile Feed-Wall