Question

我想检索Firebase用户ID。当我使用带有“FIRAuthCredential”的Facebook签名时，我可以检索用户ID，但无法在其外部检索它。因为，我正在创建实时数据库，因此我签署后需要userID。任何帮助都非常感谢？

//In this handler I can retrieve FIR userID using "user.uid"
handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {

             if (error) {
                 NSLog(@"Process error");
             } else if (result.isCancelled) {
                 NSLog(@"Cancelled");
             } else {
                 NSLog(@"Logged in");

                 FIRAuthCredential *credential = [FIRFacebookAuthProvider
                                                  credentialWithAccessToken:[FBSDKAccessToken currentAccessToken]
                                                  .tokenString];

                 [[FIRAuth auth] signInWithCredential:credential
                                           completion:^(FIRUser *user, NSError *error) {
                                               //Retrieved here
                                               [[[ self.databaseRef child:@"users"] child:user.uid]
                                                setValue:@{@"username": userName,
                                                           @"usergender":userGender,
                                                           @"useremail":userEmail,
                                                           @"userfbid":userFBID}];

                                           }];
             }
         }];

但在另一个功能之外，它会出错。

 void(purchased)
    {
       FIRUser *user;
       NSString *key = [[self.databaseRef child:@"User-Subscription"] childByAutoId].key;

     //Error here, "user.uid" is empty.
     NSDictionary *subscriptions = @{@"uid": user.uid,
     @"subs_ID": _product.productIdentifier,
     @"StartDate":[dateFormatter stringFromDate:[NSDate date]],
     @"EndDate": [dateFormatter stringFromDate:expirationDate]};

     NSDictionary *childUpdates = @{[@"/User-Subscription/" stringByAppendingString:key]: subscriptions};
     [self.databaseRef updateChildValues:childUpdates];

    }

Answer 1

我找到了一个解决方案。在signIn处理程序中，只需在设备中保存userID，然后检索它以供以后使用。但是，如果有人有另一个解决方案，他们会受到欢迎。

//In this handler I can retrieve FIR userID using "user.uid"
NSUserDefaults *saveID = [NSUserDefaults standardUserDefaults];
handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) {

             if (error) {
                 NSLog(@"Process error");
             } else if (result.isCancelled) {
                 NSLog(@"Cancelled");
             } else {
                 NSLog(@"Logged in");

                 FIRAuthCredential *credential = [FIRFacebookAuthProvider
                                                  credentialWithAccessToken:[FBSDKAccessToken currentAccessToken]
                                                  .tokenString];

                 [[FIRAuth auth] signInWithCredential:credential
                                           completion:^(FIRUser *user, NSError *error) {
                                               //Retrieved here
                                               [[[ self.databaseRef child:@"users"] child:user.uid]
                                                setValue:@{@"username": userName,
                                                           @"usergender":userGender,
                                                           @"useremail":userEmail,
                                                           @"userfbid":userFBID}];

                                           }];

                [saveID setObject:user.uid forKey:k_FIRUserID];
                [saveID synchronize];
             }
         }];

//在购买订阅功能

void(purchased)
    {
     NSString *key = [[self.databaseRef child:@"User-Subscription"] childByAutoId].key;
    //Retrieve userID here.
     NSString *saveUserID = [saveapp objectForKey:k_FIRUserID];
     NSDictionary *subscriptions = @{@"uid": saveUserID,
     @"subs_ID": _product.productIdentifier,
     @"StartDate":[dateFormatter stringFromDate:[NSDate date]],
     @"EndDate": [dateFormatter stringFromDate:expirationDate]};

     NSDictionary *childUpdates = @{[@"/User-Subscription/" stringByAppendingString:key]: subscriptions};
     [self.databaseRef updateChildValues:childUpdates];

    }

如何使用Facebook身份验证检索Firebase用户“userID”？

1 个答案: