How to send facebook user information into another view controller? - ios

Question

I'm trying to save the username and user email after a user logs into my app through facebook.
I have set up a segue to pass the info from the login view controller to the view controller where I plan to save the user strings and some other strings into my sqlite database.
When I do run my app in the destination view controller and try to insert all the data into sqlite, I am thrown an error saying the userName and the userEmail are nil strings, so my data is not being saved. I have correctly set up the segue; synthesized, added properties. But it seems to me the problem may be how I'm retrieving the data. Help would be greatly appreciated! Thank you in advance!
-(void)prepareForSegue:(UIStoryboardSegue *)segue user:(id<FBGraphUser>)user sender:(id)sender{
if([segue.identifier isEqualToString:#"loginInfo"]) {
NSString *name = user.name;
NSString *email = [user objectForKey:#"email"];
ViewController *vc = (ViewController *)[segue destinationViewController];
vc.userName = name;
vc.userEmail = email;
NSLog(#"user data is being prepared to segue");
}
}

Answer 1

You used -(void)prepareForSegue:(UIStoryboardSegue *)segue user:(id)user sender:(id)sender
There is no such method for segue unwinding in UIViewController class. Instead of that Use -
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if([segue.identifier isEqualToString:#"loginInfo"]) {
NSString *name = user.name;
NSString *email = [user objectForKey:#"email"];
ViewController *vc = (ViewController *)[segue destinationViewController];
vc.userName = name;
vc.userEmail = email;
NSLog(#"user data %#, email %#",name,email);
}
}
To get the user info you need to implement facebook delegate.
- (void)meRequestResult:(id)result WithError:(NSError *)error
{
NSLog(#"result %#",result );
if ([result isKindOfClass:[NSDictionary class]])
{
NSDictionary *dictionary;
if([result objectForKey:#"data"])
dictionary = (NSDictionary *)[(NSArray *)[result objectForKey:#"data"] objectAtIndex:0];
else
dictionary = (NSDictionary *)result;
email = [dictionary valueForKey:#"email"];
fName = [dictionary valueForKey:#"first_name"];
lName = [dictionary valueForKey:#"last_name"];
}
}