Question

This question look duplicate and ye it is 50% duplicate because there is no good answer I found any where.

let me divide my question in three part.

Current Situation:
I have implemented sign up screen with Email, Date of birth, Gender and Zipcode.

This is working very nice. I have also implement share feature in facebook and twitter in iOS 5 and 6
But now I want to implement it with facebook and twitter like

shown in following example screen:

What is problem:
I want to know how can I implement login with facebook in iOS 5. twitter is integrated with ios 5 and 6, Facebook with iOS 6 so that is not big deal (right now I think so). I have already implemented share feature for both twitter and facebook for iOS 5 & 6. so what more I need to do to implement login.

What I get in response:
As I said I need Email, Date of birth, Gender and Zipcode at time of signup.
How can I get this information if I use login with facebook and twitter.
What should I do if user have not given or block this information of this social site.

Thanks…….

Answer 1

Here is how I implemented this feature in my app:

1. Download the Facebook SDK for iOS from here

2. In your AppDelegate.h make a property of the Facebook object.

   #import <UIKit/UIKit.h>
   #import "Facebook.h"
   
   @interface OutpearAppDelegate : NSObject <UIApplicationDelegate> {
       UIWindow *window;
       IBOutlet UINavigationController *navigationController;        
   }
   
   @property (nonatomic, retain) IBOutlet UINavigationController *navigationController;
   @property (nonatomic, retain) IBOutlet UIWindow *window;
   @property (nonatomic, retain) Facebook *facebook;
   +(DemoAppDelegate*)getAppDelegate;
   

3. In your AppDelegate.m write this:

   synthesize facebook;
   

   and in your applicationDidFinishLaunching method write this:

   // Initialize Facebook with app ID
   facebook=[[Facebook alloc]initWithAppId:FB_APP_KEY andDelegate:nil];
   //here FB_AP_Key is your Facebook application key
   

   and release facebook in dealloc

4. Where you want to login with Facebook write this function:

   - (void)loginWithFacbookIdClicked
   {
       [DemoAppDelegate getAppDelegate].facebook.sessionDelegate=self;
   
       if(isInternetAvailable)
       {
           if([[DemoAppDelegate getAppDelegate].facebook isSessionValid])
           {
               //[facebookIntegration getUserFacebookPersonalInfo];
                NSLog("User already logined with facebook");
           }
           else
           {
               [[DemoAppDelegate getAppDelegate].facebook authorize:[NSArray arrayWithObjects:@"read_stream",
                                    @"publish_stream",
                                    @"email",
                                    @"user_birthday",
                                    @"friends_about_me",
                                    @"friends_activities",
                                    @"friends_likes",
                                    nil]];
           }
       }
       else
       {
          NSLog("No Internet Connection");
       }       
   }
   

5. After login, the Facebook SDK delegate methods are automatically called. Do your stuff in delegate methods.

   - (void)fbDidLogin
   {
      NSLog("Logged into Facebook");
      // Your logic goes here.   
   }
   
   -(void)fbDidNotLogin:(BOOL)cancelled
   {
       DLog(@"Login Cancelled");
   }
   
   -(void)fbDidExtendToken:(NSString *)accessToken expiresAt:(NSDate *)expiresAt
   {
   
   }
   
   -(void)fbSessionInvalidated
   {
   
   }
   
   -(void)fbDidLogout
   {
   
   }