Authentication Error while extracting user information with Facebook Graph API - ios

Question

I am trying to extract user's basic information through FBConnect latest SDK. My code is simple:
- (void)viewDidLoad {
[super viewDidLoad];
facebook = [[Facebook alloc] initWithAppId:fbAppId];
NSArray* permissions = [[NSArray arrayWithObjects:#"user_about_me",#"read_stream",nil]retain];
[facebook authorize:permissions delegate:self];
[facebook requestWithGraphPath:#"me" andDelegate:self];
NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
fbAppId, #"app_id",
[NSString stringWithFormat: #"Some Text"], #"description",
#"My Test App", #"name",
#"Test Facebook Graph API",#"message",
nil];
[facebook dialog:#"feed" andParams:params andDelegate:self];
}
- (BOOL) application: (UIApplication*) application handleOpenURL:(NSURL *)url {
return [facebook handleOpenURL:url];
}
- (void) fbDidLogin {
NSLog(#"FB didLogin");
}
- (void) fbDidNotLogin:(BOOL)cancelled {
NSLog(#"FB didNotLogin");
}
- (void) request:(FBRequest *)request didLoad:(id)result {
NSLog(#"request-didLoad-result");
}
- (void)request:(FBRequest *)request didReceiveResponse:(NSURLResponse *)response {
NSLog(#"received response");
}
Up till this point everything goes well apparently. Publish a feed through dialog on user's wall works fine. The problem occurs when I try to get user's information like name with:
[facebook requestWithGraphPath:#"me" andDelegate:self];
But neither fbDidLogin nor requestDidLoad is called. For requestDidLoad, I checked didLoadRawResponse as it is called before request didLoad:
- (void)request:(FBRequest *)request didLoadRawResponse:(NSData*)data {
NSString *response = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"Response is = %#",response);
[response release];
}
What I get in response is the following authentication error:
{"error":{"type":"OAuthException","message":"An active access token must be used to query information about the current user."}}
What is the reason and the solution?

Answer 1

I have added my whole code in the following wiki
How to retrieve Facebook response using Facebook iOS SDK
Hope this will help you, this is a working code if you have any question please let me know.