Get Facebook access token from Social.framework(iO

问题:

I need to retrieve Facebook access token of my system account, which I set in Settings application.

I know that Social.framework(iOS6) knows all my FB account information & I can perform API calls to Graph API using SLRequest class, like in this post http://blogs.captechconsulting.com/blog/eric-stroh/ios-6-tutorial-integrating-facebook-your-applications

But, my question is - how can I retrieve my Facebook system account's access token?

I found solution for Twitter https://dev.twitter.com/docs/ios/using-reverse-auth , but could you help me with Facebook

回答1:

If you already know how to get the account store set up, here's code around it showing how to get the access token:

@property (strong, nonatomic) ACAccountStore *accountStore;
@property (strong, nonatomic) ACAccount *fbAccount;

...

@synthesize accountStore = _accountStore;
@synthesize fbAccount = _fbAccount;

...

// Initialize the account store
self.accountStore = [[ACAccountStore alloc] init];

// Get the Facebook account type for the access request
ACAccountType *fbAccountType = [self.accountStore
    accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierFacebook];

// Request access to the Facebook account with the access info
[self.accountStore requestAccessToAccountsWithType:fbAccountType
                                           options:fbInfo
                                        completion:^(BOOL granted, NSError *error) {
    if (granted) {
        // If access granted, then get the Facebook account info
        NSArray *accounts = [self.accountStore
                             accountsWithAccountType:fbAccountType];
        self.fbAccount = [accounts lastObject];

        // Get the access token, could be used in other scenarios
        ACAccountCredential *fbCredential = [self.fbAccount credential];            
        NSString *accessToken = [fbCredential oauthToken];
        NSLog(@"Facebook Access Token: %@", accessToken);


        // Add code here to make an API request using the SLRequest class

    } else {
        NSLog(@"Access not granted");
    }
}];