Facebook SDK 3.0: how to receive user's e-mail? - ios

Question

In the "old" FB iOS SDK I could receive user information via the following:
NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
#"SELECT uid, name, email, pic FROM user WHERE uid=me()", #"query",
nil];
JBFacebookManager *fbManager = [JBFacebookManager getInstance];
fbManager.requestDelegate = self;
[fbManager.facebook requestWithMethodName:#"fql.query"
andParams:params
andHttpMethod:#"POST"
andDelegate:self];
How can I do this with the new FB iOS SDK 3.0? Do I need to use FBRequest or FBOpenGraphAction or FBGraphObject or a combination of those or something completely different?

Answer 1

if (FBSession.activeSession.isOpen) {
[[FBRequest requestForMe] startWithCompletionHandler:^(FBRequestConnection *connection, NSDictionary<FBGraphUser> *user, NSError *error) {
if (!error) {
self.nameLabel.text = user.name;
self.emailLabel.text = [user objectForKey:#"email"];
}
}];
}
Because FBGraphUser doesn't have an email #property, we can't access the information like with the name (dot-syntax), however the NSDictionary still has the email kv-pair and we can access it like we would do with a normal NSDictionary.
Don't forget to ask for the email permission though:
NSArray *permissions = [[NSArray alloc] initWithObjects:#"email", nil];
[FBSession sessionOpenWithPermissions:permissions completionHandler:
^(FBSession *session, FBSessionState state, NSError *error) {
[self facebookSessionStateChanged:session state:state error:error];
}];

Answer 2

Once you have access to (id<FBGraphUser>)user, you could simply use, user[#"email"].

Answer 3

from this we can get facebook user's basic info and email id.
[FBSession openActiveSessionWithReadPermissions:#[#"basic_info",#"email"] allowLoginUI:YES completionHandler:^(FBSession *session,FBSessionState status,NSError *error){
if(error)
{
NSLog(#"Facebook Error : %#",error.localizedDescription);
}
else{
}
// Respond to session state changes,
// ex: updating the view
}];

Answer 4

Did you read the source code of the 3.0 SDK? There is a method that I think is identical:
- (FBRequest*)requestWithMethodName:(NSString *)methodName
andParams:(NSMutableDictionary *)params
andHttpMethod:(NSString *)httpMethod
andDelegate:(id <FBRequestDelegate>)delegate;

Answer 5

The easiest method for getting the info after logging in is :
-(IBAction)loginWithFacebook:(id)sender{
FBSDKLoginManager *login = [[FBSDKLoginManager alloc] init];
[login
logInWithReadPermissions: #[#"public_profile",#"email"]
fromViewController:self
handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {
if (error) {
NSLog(#"Process error");
} else if (result.isCancelled) {
NSLog(#"Cancelled");
} else {
NSLog(#"Logged in");
[self getFacebookProfileInfos];
}
}];
}
-(void)getFacebookProfileInfos {
NSDictionary *parameters = # {#"fields": #"id, name, first_name, last_name, picture.type(large), email"};
if ([FBSDKAccessToken currentAccessToken]) {
[[[FBSDKGraphRequest alloc] initWithGraphPath:#"me" parameters:parameters]
startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) {
if (!error) {
NSLog(#"fetched user:%#", result);
}
}];
}
}
You will get all the info the result.