Google + sign in within app - ios

Question

I want to integrate Google+ sign in functionality to my app. I have used Google+ sdk , but it redirect to safari to sign in to google , I want to open that web dialog within my application. Can anybody help me on that thing?

Answer 1

I did it. By inheriting UIApplication class and then handling url in web view. Here is code:
Add Google+ FrameWork to your project.
Now, on authentication call, catch that URL by inhereting UIAPPLICATION Class.
- (IBAction)btnGooglePlusTap:(id)sender
{
[[GPPSignIn sharedInstance] authenticate];
}
SubClassUIApplication.h
#import <UIKit/UIKit.h>
#define ApplicationOpenGoogleAuthNotification #"GoogleFriendInvitationPosted"
#interface SubClassUIApplication : UIApplication
#end
#import "SubClassUIApplication.h"
#implementation SubClassUIApplication
- (BOOL)openURL:(NSURL *)url
{
if([[url absoluteString] hasPrefix:#"googlechrome-x-callback:"])
{
return NO;//This will prevent call to Google Chrome App if installed.
}
else if([[url absoluteString] hasPrefix:#"https://accounts.google.com/o/oauth2/auth"])
{
[[NSNotificationCenter defaultCenter] postNotificationName:ApplicationOpenGoogleAuthNotification object:url];
return NO;// Here we will pass URL to notification and from notification observer , we will load web view.
}
else if ([[url absoluteString] hasPrefix:#"com.google"])
{
return NO;
}
return [super openURL:url];
}
#end
Set this subclass as principal class in info.plist file.
Now open URL to web view
- (void)catchNotificationforGooglePlusSharing:(NSNotification *)notiofication
{
NSURL *u=(NSURL *)notiofication.object;
UINavigationController *navWebView =(UINavigationController *) [self.storyboard instantiateViewControllerWithIdentifier:#"WebViewNavController"];
WebViewController *vcWebView = navWebView.viewControllers[0];
vcWebView.webURL = u;
[self.navigationController presentViewController:navWebView animated:YES completion:Nil];
}
Now in webviewcontroller.m
- (void)viewDidLoad
{
[super viewDidLoad];
NSURLRequest *req= [[NSURLRequest alloc]initWithURL:webURL];
[webvGoogle loadRequest:req];
}
#pragma mark - UIWebViewDelegate method
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
BOOL canHandle = [GPPURLHandler handleURL:request.URL sourceApplication:#"com.apple.mobilesafari" annotation:nil];
if(canHandle == YES)
{
[self dismissViewControllerAnimated:YES completion:^
{
}];
}
return YES;
}
- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
{
NSLog(#"Error in loading : %#",error.description);
}
Don't forget to register your class for ApplicationOpenGoogleAuthNotification notification.

Answer 2

You can use GTMOAuth2ViewControllerTouch from Google Toolbox for Mac - OAuth 2 Controllers.
#import <GTMOAuth2ViewControllerTouch.h>
GTMOAuth2ViewControllerTouch *googleAuthViewController = [[GTMOAuth2ViewControllerTouch alloc]
initWithScope:#"https://www.googleapis.com/auth/userinfo#email"
clientID:kClientId
clientSecret:kSecretId
keychainItemName:#"GooglePlus_Sample_App"
delegate:self
finishedSelector:#selector(viewController:finishedWithAuth:error:)];
[self.navigationController pushViewController:googleAuthViewController animated:YES];
This is a sample found here http://blog.krzyzanowskim.com/2015/02/22/google-sign-on-with-1password/ where you can find full sample project.