如何在 UIWebView 中访问公共 Facebook 个人资料

Posted 2023-02-23

【中文标题】如何在 UIWebView 中访问公共 Facebook 个人资料

【英文标题】：How will Access a public Facebook profile in UIWebView

【发布时间】：2015-05-19 11:44:19

【问题描述】：

如何以已通过身份验证的用户身份加载 Facebook URL（例如 Facebook Mobile）？

使用 Facebook SDK 并已使用 SSO 登录，当我尝试在 UIwebView 中加载 facebook URL 时，我收到“您必须先登录”。我猜测是由于实际 Safari 的 cookie 不同浏览器。

【参考方案1】：

这似乎是不可能的，因为您已经在该特定应用程序的 UIWebView 中登录到 FB，但它并没有在未来的所有会话中保存凭据，因此，当您在同一个应用程序，之前的所有会话都消失了，您必须对用户进行身份验证才能访问 Facebook 个人资料。

【讨论】：

感谢 Vizllx。但我的观点是“MyPad”应用程序（itunes.apple.com/us/app/mypad-for-facebook-instagram/…）是如何处理这件事的。使用 webview 登录并在 webview 中显示个人资料页面。

【参考方案2】：

首先，您需要在身份验证期间更改下面的行为。

[FBSession setActiveSession:sess]; [sess openWithBehavior:(FBSessionLoginBehaviorForcingWebView) completionHandler:^(FBSession session, FBSessionState state, NSError error) ];

它肯定会起作用。

【参考方案3】：

// 首先，您需要使用图形 api 向 facebook 进行身份验证，例如下面。设置身份验证始终使用“FBSessionLoginBehaviorForcingWebView”

- (IBAction)clkFacebook:(id)sender 
    if (![SmashboardAPI hasInternetConnection]) 
        [AppDelegate showAlert:@"Error" message:@"Please check your internet connection."];
     else 
        //[self disabledAllSocialButtons];
        [self showSpinner];
        // If the session state is any of the two "open" states when the button is clicked
        if (FBSession.activeSession.state == FBSessionStateOpen
            || FBSession.activeSession.state == FBSessionStateOpenTokenExtended) 

            // Close the session and remove the access token from the cache
            // The session state handler (in the app delegate) will be called automatically
            // If the session state is not any of the two "open" states when the button is clicked
        
        else
        

            FBSession* sess = [[FBSession alloc] initWithPermissions:[NSArray arrayWithObjects:@"public_profile",@"user_friends",@"email",nil]];

            [FBSession setActiveSession:sess];
            [sess openWithBehavior:(FBSessionLoginBehaviorForcingWebView) completionHandler:^(FBSession *session, FBSessionState state, NSError *error)
             
                 [appDel sessionStateChanged:session state:state error:error];

                 [self showSpinner];
                 [self getLoggedFBUserDetails];
             ];
        
    

// 然后在 Appdelegate.m 中使用此方法，以便您可以从应用程序中的任何位置访问。

- (void)sessionStateChanged:(FBSession *)session state:(FBSessionState) state error:(NSError *)error

    // If the session was opened successfully
    if (!error && state == FBSessionStateOpen)
        // NSLog(@"Session opened");
        // Show the user the logged-in UI
        self.fbSession = FBSession.activeSession;
        //[self userLoggedIn];
        return;
    
    if (state == FBSessionStateClosed || state == FBSessionStateClosedLoginFailed) 
        // If the session is closed
        // NSLog(@"Session closed");
        // Show the user the logged-out UI
        [self userLoggedOut];
        return;
    

    // Handle errors
    if (error)
        // NSLog(@"Error");
        NSString *alertText;
        NSString *alertTitle;
        // If the error requires people using an app to make an action outside of the app in order to recover
        if ([FBErrorUtility shouldNotifyUserForError:error] == YES)
            alertTitle = @"Something went wrong";
            alertText = [FBErrorUtility userMessageForError:error];
            [self showMessage:alertText withTitle:alertTitle];
         else 

            // If the user cancelled login, do nothing
            if ([FBErrorUtility errorCategoryForError:error] == FBErrorCategoryUserCancelled) 
                //  NSLog(@"User cancelled login");

                // Handle session closures that happen outside of the app
             else if ([FBErrorUtility errorCategoryForError:error] == FBErrorCategoryAuthenticationReopenSession)
                alertTitle = @"Session Error";
                alertText = @"Your current session is no longer valid. Please log in again.";
                [self showMessage:alertText withTitle:alertTitle];

                // For simplicity, here we just show a generic message for all other errors
                // You can learn how to handle other errors using our guide: https://developers.facebook.com/docs/ios/errors
             else 
                //Get more error information from the error
                NSDictionary *errorInformation = [[[error.userInfo objectForKey:@"com.facebook.sdk:ParsedJSONResponseKey"] objectForKey:@"body"] objectForKey:@"error"];

                // Show the user an error message
                alertTitle = @"Something went wrong";
                alertText = [NSString stringWithFormat:@"Please retry. \n\n If the problem persists contact us and mention this error code: %@", [errorInformation objectForKey:@"message"]];
                [self showMessage:alertText withTitle:alertTitle];
            
        
        // Clear this token
        [FBSession.activeSession closeAndClearTokenInformation];
        // Show the user the logged-out UI
        //[self userLoggedOut];
    

// 要获取用户详细信息，请使用此方法：

- (void)getLoggedFBUserDetails

    if (FBSession.activeSession.state == FBSessionStateOpen
        || FBSession.activeSession.state == FBSessionStateOpenTokenExtended) 

        //use this active session
        [FBRequestConnection startForMeWithCompletionHandler:^(FBRequestConnection *connection, id result, NSError *error) 
            if (!error) 
                NSLog([NSString stringWithFormat:@"user info: %@", result]);

             else 
                // Check out our error handling guide: https://developers.facebook.com/docs/ios/errors/
                    [AppDelegate showAlert:@"Facebook internal error" message:[NSString stringWithFormat:@"Description:%@",[error localizedDescription]]];
                    [self hideSpinner];
            
        ];
    

// 用于在 UIWebview 中加载时间线使用下面的方法：

- (void)loadFacebookTimeline 
    NSString *strUrl = [NSString stringWithFormat:@"https://www.facebook.com/profile.php?id=%@",facebookUserId];
    NSURLRequest *requestObj = [NSURLRequest requestWithURL:[NSURL URLWithString:strUrl]];
    // Load URL in UIWebView
    [webview loadRequest:requestObj];