Question

我将我的iOS代码迁移到FBSDK v4 + Parse 1.7.1，我试图处理将用户链接到FB ID的情况，但它已经链接了：

Another user is already linked to this facebook id. (Code: 208, Version: 1.7.1)

用户注销和FB登录后，一切似乎都能正常工作，但每次我更改或保存当前用户或查询表时，都会遇到各种错误，例如：

Parse::UserCannotBeAlteredWithoutSessionError (Code: 206, Version: 1.7.1)

"PFKeychainStore" failed to set object for key 'currentUser'

no results matched the query (Code: 101, Version: 1.7.1)

这是我的代码：

NSArray *permisions = [NSArray arrayWithObjects:@"public_profile", @"email", @"user_friends", nil];
[PFFacebookUtils linkUserInBackground:[PFUser currentUser] withReadPermissions:permissions block:^(BOOL succeeded, NSError *error) {

        if(succeeded && !error) {
            //... use data
        }
        else {
            if(error.code == 208) {
                [PFUser logOut];                   
                [PFFacebookUtils logInInBackgroundWithReadPermissions:permissions block:^(PFUser *user, NSError *error) {
                   //here I get a valid user and no error but...
                   //after this point the errors mentioned start to show up

                } 

            }
            else
                //... handle other errors
        }


    }];

我使用Parse的自动用户，直到用户链接到FB帐户。

非常喜欢这方面的帮助，谢谢！

Answer 1

添加getsInBackground会停止错误：

NSArray *permisions = [NSArray arrayWithObjects:@"public_profile", @"email", @"user_friends", nil];
[PFFacebookUtils linkUserInBackground:[PFUser currentUser] withReadPermissions:permissions block:^(BOOL succeeded, NSError *error) {

    if(succeeded && !error) {
        //... success
    }
    else {
        if(error.code == kPFErrorFacebookAccountAlreadyLinked) {
            [PFUser logOutInBackgroundWithBlock:^(NSError *error) {
                if(!error) {
                    [PFFacebookUtils linkUserInBackground:[PFUser currentUser] withReadPermissions:permissions block:^(BOOL succeeded, NSError *error) {
                        [PFUser becomeInBackground:[[PFUser currentUser] sessionToken] block:^(PFUser *user, NSError *error) {
                           if(user && !error) {
                                // ... success
                           }
                           else {
                               //... handle become error
                           }
                        }];
                     }];
                }
                else {
                    // ... handle bad logout
                }


        }
        else {
            //... handle other errors
        }
    }


}];

PFUser logOut和PFFacebookUtils之后的错误logInInBackgroundWithReadPermissions

1 个答案: