Question

我正在尝试在我的应用中加入Facebook登录功能，并且到目前为止还有以下两种方法：

#pragma mark - IBActions

- (IBAction)loginWithFacebookButtonPressed:(id)sender {

    self.activityIndicator.hidden = NO;
    [self.activityIndicator startAnimating];

    NSArray *permissionsArray = @[@"public_profile", @"email", @"user_friends"];

    FBSDKLoginManager *loginManager = [[FBSDKLoginManager alloc] init];

    [loginManager logInWithReadPermissions:permissionsArray fromViewController:nil handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {

        self.activityIndicator.hidden = YES;
        [self.activityIndicator stopAnimating];

        if(!result){
            if(!error){
                UIAlertView *alertViewCancel = [[UIAlertView alloc] initWithTitle:@"Login Error" message:@"Login to Facebook was cancelled" delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles: nil];
                [alertViewCancel show];
            }else if(error){
                UIAlertView *alertViewError = [[UIAlertView alloc] initWithTitle:@"Login Error" message:[error description] delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles: nil];
                [alertViewError show];
            }
        }else{
            [self updateUserInformation];
            [self performSegueWithIdentifier:@"toTabBarController" sender:sender];
        }
    }];
}

#pragma mark - Helper Method

- (void) updateUserInformation{
    FBRequest *request = [FBRequest requestForMe];

    [request startWithCompletionHandler:^(FBRequestConnection *connection, id result, NSError *error) {
        if(!error){
            NSDictionary *userDictionary = (NSDictionary *) result;

            NSMutableDictionary *userProfile = [[NSMutableDictionary alloc] initWithCapacity:8];

            if(userDictionary[@"name"]){
                userProfile[@"name"] = userDictionary[@"name"];
            }
            if(userDictionary[@"first_name"]){
                userProfile[@"first_name"] = userDictionary[@"first_name"];
            }
            if(userDictionary[@"location"][@"name"]){
                userProfile[@"location"] = userDictionary[@"location"][@"name"];
            }
            if (userDictionary[@"gender"]) {
                userProfile[@"gender"] = userDictionary[@"gender"];
            }
            if (userDictionary[@"birthday"]) {
                userProfile[@"birthday"] = userDictionary[@"birthday"];
            }
            if (userDictionary[@"interested_in"]) {
                userProfile[@"interested_in"] = userDictionary[@"interested_in"];
            }
            [[PFUser currentUser] setObject:userProfile forKey:@"profile"];
            [[PFUser currentUser] saveInBackground];
        }else{
            NSLog(@"Error in Facebook Request: %@", [error description]);
        }
    }];
}

我的问题是，当我使用Facebook登录时（在我的loginWithFacebookButtonPressed方法中），我被告知会自动为登录Facebook的当前用户创建PFUser对象。在我的帮助方法（updateUserInformation）中，我试图从Facebook获取用户的信息，并在解析时存储该PFUser的信息。不幸的是，由于PFUser对象（对于使用我的应用程序登录Facebook的用户）没有自动创建，因此现在[PFUser currentUser]将无法工作。有人能告诉我如何为使用我的应用程序登录Facebook的用户创建PFUser对象吗？

PFUser对象未自动创建

0 个答案: