Integrate application with Google Account signIn in IOS.

Kunal Prasad

14 December 2016

Google SignIn

1: There are two ways to Integrate the Application with google sign in. (Using cocoa pod and manual);

2: Here I am mentioning manual way.

3: Download the Google SDK from that site. (https://developers.google.com/identity/sign-in/ios/sdk/)

4: Extract the SDK archive you downloaded and copy the following files to your Xcode project:

- GoogleSignIn.framework
- GoogleSignIn.bundle
Add GoogleSignIn.bundle to your Xcode project’s Copy Bundle Resources build phase.

5: Link the dependent framework in Xcode.

AddressBook.framework
SafariServices.framework
SystemConfiguration.framework

6: set other linker flags in build setting

Other Linker Flags: $(OTHER_LDFLAGS) -ObjC

7: Get the Configuration file by clicking that URL : (https://developers.google.com/mobile/)

8: Enter App name and bundle Id so it will create .plist file so you have to drag into your xcode as root.

9: add the following Data :

Also, you will need to set the client ID directly using the value found in the GoogleService-Info.plist file:

<span class="pun">[</span><span class="typ">GIDSignIn</span><span class="pln"> sharedInstance</span><span class="pun">].</span><span class="pln">clientID </span><span class="pun">=</span><span class="pln"> kClientID</span><span class="pun">;</span>

1 2	<span class="pun">[</span><span class="typ">GIDSignIn</span><span class="pln"> sharedInstance</span><span class="pun">].</span><span class="pln">clientID </span><span class="pun">=</span><span class="pln"> kClientID</span><span class="pun">;</span>

10 : Do some changes in App delegate file :

#import "AppDelegate.h"
#import <GoogleSignIn/GoogleSignIn.h>

@interface AppDelegate ()

@end

@implementation AppDelegate

static NSString * const kClientID = @"442678058869-fto2clbuonqr1au1laa2u23fnji0h454.apps.googleusercontent.com";


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    [GIDSignIn sharedInstance].clientID = kClientID;
    return YES;
}
- (BOOL)application:(UIApplication *)application
            openURL:(NSURL *)url
  sourceApplication:(NSString *)sourceApplication
         annotation:(id)annotation {
    return [[GIDSignIn sharedInstance] handleURL:url
                               sourceApplication:sourceApplication
                                      annotation:annotation];
}

#import "AppDelegate.h"

#import <GoogleSignIn/GoogleSignIn.h>

@interface AppDelegate ()

@end

@implementation AppDelegate

static NSString * const kClientID = @"442678058869-fto2clbuonqr1au1laa2u23fnji0h454.apps.googleusercontent.com";

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

// Override point for customization after application launch.

[GIDSignIn sharedInstance].clientID = kClientID;

return YES;

}

- (BOOL)application:(UIApplication *)application

openURL:(NSURL *)url

sourceApplication:(NSString *)sourceApplication

annotation:(id)annotation {

return [[GIDSignIn sharedInstance] handleURL:url

sourceApplication:sourceApplication

annotation:annotation];

}

here kClientId is client id of generated configuration .plist file.

11: Now to draw the google sign in button so here I am taking a view controller to display all that things.

a: viewcontroller.m class

//
//  ViewController.m
//  DummyGoogleSignIn
//
//  Created by kunal prasad on 12/09/16.
//  Copyright © 2016 Webkul. All rights reserved.
//

#import "ViewController.h"
#import <GoogleSignIn/GoogleSignIn.h>

@interface ViewController () <GIDSignInDelegate, GIDSignInUIDelegate>

@property (nonatomic, copy) void (^confirmActionBlock)(void);
@property (nonatomic, copy) void (^cancelActionBlock)(void);

@end



@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
   GIDSignInButton *polygonView = [[GIDSignInButton alloc] initWithFrame: CGRectMake ( 20, 200, 120, 50)];
    polygonView.backgroundColor = [UIColor clearColor];
    [_mainView addSubview:polygonView];
    
    
    [GIDSignInButton class];
    
    GIDSignIn *signIn = [GIDSignIn sharedInstance];
    signIn.shouldFetchBasicProfile = YES;
    signIn.delegate = self;
    signIn.uiDelegate = self;

}
#pragma mark - GIDSignInDelegate


- (void)signIn:(GIDSignIn *)signIn
didSignInForUser:(GIDGoogleUser *)user
     withError:(NSError *)error {
    NSLog(@"gfklghfghfghf ");
    if (error) {
        NSLog(@"error at signin111 %@",error);
        return;
    }
    else{
        
        NSString *email = user.profile.email;
        NSString *name = user.profile.name;
        NSURL *imageURL;
        if ([GIDSignIn sharedInstance].currentUser.profile.hasImage){
            NSUInteger dimension = round(120 * [[UIScreen mainScreen] scale]);
            imageURL = [user.profile imageURLWithDimension:dimension];
        }
        
        
        NSLog(@"email  %@   %@   %@",email,name,imageURL);
        [[GIDSignIn sharedInstance] signOut];
    }
    
}

- (void)signIn:(GIDSignIn *)signIn presentViewController:(UIViewController *)viewController {
    [self presentViewController:viewController animated:YES completion:nil];
    NSLog(@" login button clicked");
}

- (void)signIn:(GIDSignIn *)signIn dismissViewController:(UIViewController *)viewController {
    [self dismissViewControllerAnimated:YES completion:nil];
    NSLog(@"dismiss sign in ");
}


- (void)reportAuthStatus {
    GIDGoogleUser *googleUser = [[GIDSignIn sharedInstance] currentUser];
    if (googleUser.authentication) {
        NSLog(@"already login ");
    } else {
        // To authenticate, use Google+ sign-in button.
        NSLog(@" Not Login");
    }
}






@end

// ViewController.m

// DummyGoogleSignIn

// Created by kunal prasad on 12/09/16.

#import "ViewController.h"

#import <GoogleSignIn/GoogleSignIn.h>

@interface ViewController () <GIDSignInDelegate, GIDSignInUIDelegate>

@property (nonatomic, copy) void (^confirmActionBlock)(void);

@property (nonatomic, copy) void (^cancelActionBlock)(void);

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

GIDSignInButton *polygonView = [[GIDSignInButton alloc] initWithFrame: CGRectMake ( 20, 200, 120, 50)];

polygonView.backgroundColor = [UIColor clearColor];

[_mainView addSubview:polygonView];

[GIDSignInButton class];

GIDSignIn *signIn = [GIDSignIn sharedInstance];

signIn.shouldFetchBasicProfile = YES;

signIn.delegate = self;

signIn.uiDelegate = self;

}

#pragma mark - GIDSignInDelegate

- (void)signIn:(GIDSignIn *)signIn

didSignInForUser:(GIDGoogleUser *)user

withError:(NSError *)error {

NSLog(@"gfklghfghfghf ");

if (error) {

NSLog(@"error at signin111 %@",error);

return;

}

else{

NSString *email = user.profile.email;

NSString *name = user.profile.name;

NSURL *imageURL;

if ([GIDSignIn sharedInstance].currentUser.profile.hasImage){

NSUInteger dimension = round(120 * [[UIScreen mainScreen] scale]);

imageURL = [user.profile imageURLWithDimension:dimension];

}

NSLog(@"email %@ %@ %@",email,name,imageURL);

[[GIDSignIn sharedInstance] signOut];

}

- (void)signIn:(GIDSignIn *)signIn presentViewController:(UIViewController *)viewController {

[self presentViewController:viewController animated:YES completion:nil];

NSLog(@" login button clicked");

}

- (void)signIn:(GIDSignIn *)signIn dismissViewController:(UIViewController *)viewController {

[self dismissViewControllerAnimated:YES completion:nil];

NSLog(@"dismiss sign in ");

}

- (void)reportAuthStatus {

GIDGoogleUser *googleUser = [[GIDSignIn sharedInstance] currentUser];

if (googleUser.authentication) {

NSLog(@"already login ");

} else {

// To authenticate, use Google+ sign-in button.

NSLog(@" Not Login");

}

@end

12: Now, at last, you have to change your own project info.plist file.

In the Project > Target > Info > URL Types panel, create a new item and paste yours REVERSED_CLIENT_ID into the URL Schemes field. You can find yours REVERSED_CLIENT_ID in the GoogleService-Info.plist file.

13: Now Run.

14: You can also download sample apps go to https://github.com/googlesamples/google-services/tree/master/ios/signin/SignInExample .