如何使用 Facebook iOS SDK 4.x“重新请求"电子邮件权限? [英] How to “rerequest” email permission using Facebook iOS SDK 4.x?

问题描述

我正在将 FacebookSDK 4.x 与自定义 UI 集成，并使用以下方法登录并获得用户的电子邮件许可.

I am integrating FacebookSDK 4.x integration with custom UI and using following method to log-in and also getting email permission from user.

FBSDKLoginManager *login = [[FBSDKLoginManager alloc] init];
    [login logInWithReadPermissions:@[@"email"] handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {
        if (error){
            NSLog(@"%@",[error localizedDescription]);            
        }
        else if (result.isCancelled){
            NSLog(@"Cancled");
        }
        else
        {
            if ([result.grantedPermissions containsObject:@"email"])
            { 
                NSLog(@"Granted all permission");
                if ([FBSDKAccessToken currentAccessToken])
                {
                    [[[FBSDKGraphRequest alloc] initWithGraphPath:@"me" parameters:nil] startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error)
                    {
                        if (!error)
                        {
                            NSLog(@"%@",result);
                        }
                    }];
                }
            }
            else
            {
                NSLog(@"Not granted");
            }
        }
    }];

除非用户拒绝访问电子邮件"，否则这很有效.我在 FacebookSDK 文档中看到，我可以一次重新请求访问用户的电子邮件.根据 FB 文档:如本 link

This works great unless the user denies access to "email". I see in the FacebookSDK docs that I can re-request access to the user's email one time. According to the FB docs: as given in this link

If someone has declined a permission for your app, the login dialog won't let your app re-request the permission unless you pass auth_type=rerequest along with your request.

启用重新验证

在您选择的登录流程中，我们向您展示了如何使用登录对话和 OAuth 对某人进行身份验证并从中请求权限他们.要重新进行身份验证，您可以使用这些相同的步骤以及附加的强制参数:

During your chosen login flow we showed you how to use the Login Dialog and OAuth to authenticate someone and request permissions from them. To re-authenticate, you can use these same steps with additional parameters to force it:

auth_type:该参数指定请求的认证功能(以逗号分隔的列表).有效的选项是:https - 检查是否存在安全的 Facebook 会话，如果不存在则要求重新验证reauthenticate - 要求此人无条件地重新进行身份验证

auth_type: this parameter specifies the requested authentication features (as a comma-separated list). Valid options are: https - checks for the presence of a secure Facebook session and asks for re-authentication if it is not present reauthenticate - asks the person to re-authenticate unconditionally

auth_nonce: includes an app generated alphanumeric nonce which can be used to provide replay protection. See how to check an auth_nonce

了解更多.

这是一个使用 JavaScript SDK 触发的示例使用 auth_type 的 reauthenticate 进行重新验证:

Here is an example using the JavaScript SDK that triggers re-authentication using an auth_type of reauthenticate:

FB.login(function(response) {//原始FB.login代码}, { auth_type: 'reauthenticate' })

请注意，响应正文包含 auth_type 参数您指定，例如:

Note that the body of the response contains the auth_type parameter you specified, for example:

access_token=USER_ACCESS_TOKEN&expires=SECONDS_UNTIL_TOKEN_EXPIRES&auth_type=reauthenticate

access_token=USER_ACCESS_TOKEN&expires=SECONDS_UNTIL_TOKEN_EXPIRES&auth_type=reauthenticate

如何通过 iOS SDK 将auth_type=rerequest"传递给 Facebook 的服务器?有什么特别的方法吗?

How do I pass "auth_type=rerequest" to Facebook's servers via the iOS SDK? Is there a special method for that?

推荐答案

我通过回忆方法解决了问题:

I resolved issue by recalling the method :

[login logInWithReadPermissions:@[@"email"] handler:^(FBSDKLoginManagerLoginResult *result, NSError *error)

我需要在再次请求时传递 auth_type: 'rerequest' 并且我在此方法的文档中得到它我得到了描述:

I need to pass auth_type: 'rerequest' while requesting again and i get it in the documentation of this method i get the description :

请求读取权限时使用此方法.你应该只问在需要时获取权限并向用户.您可以检查 result.decliningPermissions 还提供如果用户拒绝权限，则向用户提供更多信息.

Use this method when asking for read permissions. You should only ask for permissions when they are needed and explain the value to the user. You can inspect the result.declinedPermissions to also provide more information to the user if they decline permissions.

如果[FBSDKAccessToken currentAccessToken] 不为零，则为被视为对该用户的重新授权，并将通过登录对话框的重新请求"标志.

If [FBSDKAccessToken currentAccessToken] is not nil, it will be treated as a reauthorization for that user and will pass the "rerequest" flag to the login dialog.

问题是我正在调用 FbSDKLoginManager 类的 logout 方法.这将清除令牌，并将其作为旧权限而不是重新请求的权限.

just the problem was i was calling logout Method of FbSDKLoginManager class. This will clear the token and it will takes it as the old permission not re-requested permission.

这篇关于如何使用 Facebook iOS SDK 4.x“重新请求"电子邮件权限?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！