如何使用 Facebook SDK 在我的应用程序中注销 Facebook

Posted 2023-03-17

【中文标题】如何使用 Facebook SDK 在我的应用程序中注销 Facebook

【英文标题】：How to logout facebook in my app using Facebook SDK

【发布时间】：2015-11-13 05:38:33

【问题描述】：

我已经在我的应用程序中集成了 Facebook 登录，因此用户可以使用我的应用程序帐户和 Facebook 登录并执行相应的操作。对于 Facebook 集成，我添加了Facebook SDK。现在，当在我的应用程序中单击注销按钮时，它具有清除 Facebook 帐户的所有凭据。但是当我再次单击按钮时，我直接登录到我的帐户，而无需转到 Facebook 登录页面。

如何退出 Facebook？

- (void)viewDidLoad 

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.
    [self toggleHiddenState:YES];

    self.fbLoginStates.text = @"";
    self.loginButton.delegate = self;
    self.loginButton.readPermissions = @[@"public_profile", @"email"];


-(void)toggleHiddenState:(BOOL)shouldHide    

    self.lblUsername.hidden = shouldHide;
    self.lblEmail.hidden = shouldHide;
    self.profilePicture.hidden = shouldHide;


#pragma mark - FBLoginView Delegate method implementation

-(void)loginViewShowingLoggedInUser:(FBLoginView *)loginView
        
    self.fbLoginStates.text = @"You are logged in.";

    [self toggleHiddenState:NO];


-(void)loginViewFetchedUserInfo:(FBLoginView *)loginView user:(id<FBGraphUser>)user
        
    NSLog(@"%@", user);

    self.profilePicture.profileID = user.id;
    self.lblUsername.text = user.name;
    self.lblEmail.text = [user objectForKey:@"email"];


-(void)loginViewShowingLoggedOutUser:(FBLoginView *)loginView

    self.fbLoginStates.text = @"You are logged out";

    [self toggleHiddenState:YES];


-(void)loginView:(FBLoginView *)loginView handleError:(NSError *)error

    NSLog(@"%@", [error localizedDescription]);

【参考方案1】：

在 AppDelegate .m

#import <FBSDKCoreKit/FBSDKCoreKit.h>
#import <FBSDKLoginKit/FBSDKLoginKit.h>

在 AppDelegate .m

return [[FBSDKApplicationDelegate sharedInstance] application:application
                                    didFinishLaunchingWithOptions:launchOptions];

在登录屏幕.m:-

- (void)FacebookLogin:(id)sender 
//    [[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(getFacebookData) name:@"getFacebookData" object:nil];
    FBSDKLoginManager *login = [[FBSDKLoginManager alloc] init];
    [login
     logInWithReadPermissions: @[@"public_profile", @"email", @"user_friends"]
     handler:^(FBSDKLoginManagerLoginResult *result, NSError *error) 
         if (error) 
             NSLog(@"Process error");
          else if (result.isCancelled) 
             NSLog(@"Cancelled");
          else 
             NSLog(@"Logged in");
             [MBProgressHUD showHUDAddedTo:self.view animated:YES];
              FBSDKGraphRequest *request = [[FBSDKGraphRequest alloc]
                                           initWithGraphpath:@"/me"
                                           parameters:@ @"fields": @" email",
                                           HTTPMethod:@"GET"];
             [request startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) 
                 // Insert your code here
                 NSLog(@"%@",result);              
              [MBProgressHUD hideHUDForView:self.view animated:YES];
               failedBlock:^
              [MBProgressHUD hideHUDForView:self.view animated:YES];
                  UIAlertController * alert=   [UIAlertController alertControllerWithTitle:APP_NAME message:@"Could not connect to the server." preferredStyle:UIAlertControllerStyleAlert];
                  UIAlertAction* okButton = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action)
                                             
                                                 //Handel your yes please button action here
                                                 [alert dismissViewControllerAnimated:YES completion:nil];

                                             ];
                  [alert addAction:okButton];
                  [self presentViewController:alert animated:YES completion:nil];
              ];

             ];

         
     ];

在注销屏幕.m :-

 -(IBAction)Logout:(id)sender

       [[FBSDKLoginManager new] logOut];    

【讨论】：

嗨@varun Naharia。感谢您的回复。我正在尝试 FBSDKLoginManager 方法。但我得到了错误。

什么错误，请在您的问题中添加该错误？

错误显示如下“使用未声明的标识符 FBSDKLoginManager”。实际上我也无法导入 FBSDKLoginManager.h 类

cam u 将任何完整的 facebook 集成代码发送给我。我需要登录和注销功能

你这是什么意思？