ViewController 不显示属性 FB/Parse

Question

我正在使用 Parse，我想显示从 Parse 获取的电子邮件并显示在 Parse 的列中。 first_name、last_name、id 等所有内容都可以正常工作。但是当我尝试设置 prop.email 时，它没有找到任何属性。如果我在该位置（在代码中标记）执行相同的操作，它会发现我的电子邮件属性没有任何问题。

我的意思是这行代码：

[[PFUser currentUser] setObject:prop.id forKey:@"fbid"];
[[PFUser currentUser] saveInBackground];
[[PFUser currentUser] setObject:prop.first_name forKey:@"firstname"];
[[PFUser currentUser] saveInBackground];
[[PFUser currentUser] setObject:prop.last_name forKey:@"lastname"];
[[PFUser currentUser] saveInBackground];
//This one doesn`t find property email
[[PFUser currentUser] setObject:prop.email forKey:@"email"];
[[PFUser currentUser] saveInBackground];

FB 连接的其余部分代码

{
    NSArray *permissionsArray = @[@"email"];
    [PFFacebookUtils logInWithPermissions:permissionsArray block:^(PFUser *user, NSError *error) {
        // Was login successful ?
        if (!user) {
        if (!error) {
                NSLog(@"The user cancelled the Facebook login.");
            }else {
                NSLog(@"An error occurred: %@", error.localizedDescription);
            }
            // Callback - login failed
            if ([delegate respondsToSelector:@selector(commsDidLogin:)]) {
                [delegate commsDidLogin:NO];
            }
        }else if (user.isNew) {
            NSLog(@"User signed up and logged in through Facebook!");
            [FBRequestConnection startForMeWithCompletionHandler:^(FBRequestConnection *connection, id result, NSError *error) {
                if (!error) {
                    NSDictionary<FBGraphUser> *prop = (NSDictionary<FBGraphUser> *)result;
                    [[PFUser currentUser] setObject:prop.id forKey:@"fbid"];
                    [[PFUser currentUser] saveInBackground];
                    [[PFUser currentUser] setObject:prop.first_name forKey:@"firstname"];
                    [[PFUser currentUser] saveInBackground];
                    [[PFUser currentUser] setObject:prop.last_name forKey:@"lastname"];
                    [[PFUser currentUser] saveInBackground];
                    [[PFUser currentUser] setObject:prop.email forKey:@"email"];
                    [[PFUser currentUser] saveInBackground];
                 }else {
            NSLog(@"User logged in through Facebook!");
                    NSLog(@"Welcome Screen I am %@", [[PFUser currentUser] username]);
                 }
             }];
         } 
         else {
             //HERE
             NSLog(@"Error getting the FB username %@", [error description]);
         }
        [[PFUser currentUser] saveInBackground];
        // Callback - login successful
        if ([delegate respondsToSelector:@selector(commsDidLogin:)]) {
            [delegate commsDidLogin:YES];
        }
    }];
}

Answer 1

您的代码会产生编译错误，因为email 未在FBGraphUser 协议中定义。因此，您需要找到一种不同的方式从 Facebook 获取用户电子邮件。

如果您使用 PFSignUpViewController 并稍后链接帐户，请确保用户在该时间点输入电子邮件。