Google Plus api for iOS get friend list

Question

I want to get friends(People) list from Google+ in iOS app.

I am using Google+ api tutorial given in link https://developers.google.com/+/mobile/ios/getting-started

I am created new project on Google+ Developer Console the link is

https://console.developers.google.com/project

Getting following error in -(void)getPeopleInfo.

[lvl=3] __31-[ViewController getPeopleInfo]_block_invoke() Error: Error Domain=com.google.GTLJSONRPCErrorDomain Code=401 "The operation couldn’t be completed. (Invalid Credentials)" UserInfo=0x14d89340 {error=Invalid Credentials, GTLStructuredError=GTLErrorObject 0x14d855e0: {message:"Invalid Credentials" code:401 data:[1]}, NSLocalizedFailureReason=(Invalid Credentials)} 2014-03-13 12:40:21.026 GPlusDemo[636/0x3d35718c] [lvl=3] __31-[ViewController getPeopleInfo]_block_invoke() Error: Error Domain=com.google.GTLJSONRPCErrorDomain Code=401 "The operation couldn’t be completed. (Invalid Credentials)" UserInfo=0x14d85f90 {error=Invalid Credentials, GTLStructuredError=GTLErrorObject 0x14d85ba0: {message:"Invalid Credentials" code:401 data:[1]}, NSLocalizedFailureReason=(Invalid Credentials)}

I written the following code in ViewController.m

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.


    GPPSignIn *signIn = [GPPSignIn sharedInstance];
    signIn.shouldFetchGooglePlusUser = YES;
    //signIn.shouldFetchGoogleUserEmail = YES;  // Uncomment to get the user's email

    // You previously set kClientId in the "Initialize the Google+ client" step
    signIn.clientID = kClientId;

    // Uncomment one of these two statements for the scope you chose in the previous step
    signIn.scopes = @[ kGTLAuthScopePlusLogin];  // "https://www.googleapis.com/auth/plus.login" scope
    signIn.scopes = @[ @"profile" ];            // "profile" scope

    // Optional: declare signIn.actions, see "app activities"
    signIn.delegate = self;

    [signIn trySilentAuthentication];

}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


-(void)refreshInterfaceBasedOnSignIn
{
    if ([[GPPSignIn sharedInstance] authentication]) {
        // The user is signed in.
        NSLog(@"Login");
        self.signInButton.hidden = YES;
        // Perform other actions here, such as showing a sign-out button

        [self getPeopleInfo];
    } else {
        self.signInButton.hidden = NO;
        // Perform other actions here
    }
}

- (void)finishedWithAuth: (GTMOAuth2Authentication *)auth
                   error: (NSError *) error
{
    NSLog(@"Received error %@ and auth object %@",error, auth);
    if (error) {
        // Do some error handling here.
    } else {
        [self refreshInterfaceBasedOnSignIn];
    }
}

- (void)signOut {
    [[GPPSignIn sharedInstance] signOut];
}


- (void)disconnect {
    [[GPPSignIn sharedInstance] disconnect];
}

- (void)didDisconnectWithError:(NSError *)error {
    if (error) {
        NSLog(@"Received error %@", error);
    } else {
        // The user is signed out and disconnected.
        // Clean up user data as specified by the Google+ terms.
    }
}

-(void)getPeopleInfo
{
    GTLServicePlus* plusService = [[GTLServicePlus alloc] init];
    plusService.retryEnabled = YES;

    [plusService setAuthorizer:[GPPSignIn sharedInstance].authentication];


    GTLQueryPlus *query =
    [GTLQueryPlus queryForPeopleListWithUserId:@"me"
                                    collection:kGTLPlusCollectionVisible];
    [plusService executeQuery:query
            completionHandler:^(GTLServiceTicket *ticket,
                                GTLPlusPeopleFeed *peopleFeed,
                                NSError *error) {
                if (error) {
                    GTMLoggerError(@"Error: %@", error);
                } else {
                    // Get an array of people from GTLPlusPeopleFeed
                    NSArray* peopleList = [peopleFeed.items mutableCopy];

                    NSLog(@"peopleList:%@", peopleList);
                }
            }];
}

Answer 1

Hi i was also facing the same problem. This problem Occurring Because of scope. In Your code You have override the scope.

signIn.scopes = @[ kGTLAuthScopePlusLogin];  

With

signIn.scopes = @[ @"profile" ];            // "profile" scope

So, You have to change Your scope By Simple

signIn.scopes = @[ kGTLAuthScopePlusLogin]; 

Or

signIn.scopes = @[ kGTLAuthScopePlusLogin,@"profile"]; 

Answer 2

GTLServicePlus* plusService = [[GTLServicePlus alloc] init];
plusService.retryEnabled = YES;

[plusService setAuthorizer:[GPPSignIn sharedInstance].authentication];
GTLQueryPlus *query =
[GTLQueryPlus queryForPeopleListWithUserId:@"me"
                                collection:kGTLPlusCollectionVisible];
[plusService executeQuery:query
        completionHandler:^(GTLServiceTicket *ticket,
                            GTLPlusPeopleFeed *peopleFeed,
                            NSError *error) {
            if (error) {
                GTMLoggerError(@"Error: %@", error);
            } else {
                // Get an array of people from GTLPlusPeopleFeed
                NSArray* peopleList = peopleFeed.items;
                NSLog(@"peopleList %@ ",peopleList.description);
                for (NSArray *dict in peopleFeed.items) {
                    NSString *strID=(NSString*)((GTLPlusPerson*)dict).identifier;
                    NSLog(@"strID %@",strID);
                }


            }
        }];

Answer 3

Hi I was also facing same error but it got resolved. The problem is in setting scope.

set the scope as #define kGTLAuthScopePlusLogin @"https://www.googleapis.com/auth/plus.login"

- (void)viewDidLoad
{
[super viewDidLoad];

GPPSignIn *signInG = [GPPSignIn sharedInstance];
signInG.shouldFetchGooglePlusUser  = YES;
signInG.shouldFetchGoogleUserEmail = YES;
signInG.clientID = kClientId;
signInG.scopes   = @ [kGTLAuthScopePlusLogin];
signInG.delegate = self;
[signInG trySilentAuthentication];
}

It will fetch friends details like name, image url but not Email address. For fetching Email address try to use Contact API. iOS has NSXMLParser, the contact api code is given in JS, java, net u could use that and fetch the details.

Answer 4

We have a way to get google plus visible friends information. Please take a look on description and if it will be not clear enough for you, then I will provide more description.

GTMOAuth2Authentication *auth;

/*That you will get when you login by your google plus account. So I am considering that you already have it.*/

NSMutableArray  *arrFriends  = [NSMutableArray new];

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^
{
    NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"https://www.googleapis.com/plus/v1/people/%@/people/visible?orderBy=alphabetical&access_token=%@",@"your_user_id",auth.accessToken]];

    /*When you login via Google plus and fetch your profile information, you will get your user id.*/

    ASIHTTPRequest *request = [[ASIHTTPRequest alloc] initWithURL:url];
    [request startSynchronous];

    if(LOGS_ON) NSLog(@"GooglePlusConnect-->getchGooglePlusFriends-->responseString = %@",request.responseString);
});

Plaease let me know if it is not clear enough for you, then i will provide some more description.

Answer 5

Call the following method, after login success, for me, i am getting friends list using below method

-(void)finishedWithAuth: (GTMOAuth2Authentication *)auth
                   error: (NSError *) error {


GTLServicePlus* plusService = [[GTLServicePlus alloc] init];

    plusService.retryEnabled = YES;

    [plusService setAuthorizer:[GPPSignIn sharedInstance].authentication];
    GTLQueryPlus *query =
    [GTLQueryPlus queryForPeopleListWithUserId:@"me"
                                    collection:kGTLPlusCollectionVisible];
    [plusService executeQuery:query
            completionHandler:^(GTLServiceTicket *ticket,
                                GTLPlusPeopleFeed *peopleFeed,
                                NSError *error) {
                if (error) {
                    GTMLoggerError(@"Error: %@", error);
                } else {
                    // Get an array of people from GTLPlusPeopleFeed
                    NSArray* peopleList = peopleFeed.items;
                    NSLog(@"peopleList %@ ",peopleList);

                }
            }];

}

Answer 6

As per my experience, Google+ SDK is not having any method fetching the friend list currently.

It's suggested to use Google Contacts API for fetching contacts. It may happen that contacts fetched from this API are not active on Google+. So it's mixed list.

So, Wait for the updates from Google.