Question

我正试图从Facebook的SessionLoginSample应用程序获取用户的电子邮件地址。我不确定我在这里做错了什么。我相信这是我获取电子邮件地址的正确区域。有什么方向可以告诉我，这将有助于我回复一封简单的电子邮件吗？任何帮助将不胜感激！谢谢！

- (void)updateView {
    // get the app delegate, so that we can reference the session property
    SLAppDelegate *appDelegate = [[UIApplication sharedApplication]delegate];
    if (appDelegate.session.isOpen) {        
        // valid account UI is shown whenever the session is open
        [self.buttonLoginLogout setTitle:@"Log out" forState:UIControlStateNormal];        
        [self.textNoteOrLink setText:[NSString stringWithFormat:@"https://graph.facebook.com/me/friends?access_token=%@",
                                 appDelegate.session.accessTokenData.accessToken]];

//GET THE USER'S EMAIL ADDRESS HERE        
NSString *emailAddress= [user objectForKey:@"email"];         

        self.labelFirstName.text = [NSString stringWithFormat:@"Email: %@", emailAddress];

    } else {        
        // login-needed account UI is shown whenever the session is closed
        [self.buttonLoginLogout setTitle:@"Log in" forState:UIControlStateNormal];        
        [self.textNoteOrLink setText:@"Login to create a link to fetch account data"];        
    }
}

Answer 1

请确保您已要求用户获取访问其电子邮件地址的权限。以下是文档链接：https://developers.facebook.com/docs/reference/login/email-permissions/

示例

创建具有权限的数组

NSArray *permissions = [[NSArray alloc] initWithObjects:@"email",nil];

然后添加openActiveSessionWithReadPermissions的权限：这样的方法：

[FBSession openActiveSessionWithReadPermissions:permissions allowLoginUI:YES completionHandler:^(FBSession *session, FBSessionState status, NSError *error) { if (error) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:error.localizedDescription delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert show]; } }];

此示例使用Facebook SDK for iOS

从Facebook SessionLoginSample iOS应用程序获取用户电子邮件

1 个答案: