在ios app.cannot切换用户中，facebook没有正确注销 [英] facebook does not logout properly in ios app.cannot switch users

问题描述

我正在使用fb sdk提供的Facebook登录按钮，在我的应用程序中实现Facebook登录。当我注销Facebook按钮确实会改回登录。但是当我点击它，Safari浏览器应用程序打开显示你有alreay授权的应用程序点击确认或取消。实际上，我需要Facebook登录和密码屏幕在这里。我不能切换用户，直到我重置模拟器。以每次我注销以编程方式重新设置safari内容，以便

i am using the facebook login button provided by the fb sdk for implementing the facebook login in my app.When i am logging out the facebook button does change back to login again.but when i click on it,the safari app opens showing "you have alreay authorised the app"click confirm or cancel.Actually i needed the facebook login and password screen here.I cannot switch user until i reset the simulator.how to reset the contents in safari programmatically each time i logout so that the login screen is shown each time.

请注意，当我手动清除safari的网站数据时，会再次显示登录页面。可以通过编程方式。

Please note that when i clear the website data of safari manually it shows the login page again.can it be done programmatically.

我用于登录的代码如下

//creating the login button
 FBLoginView *loginView =
    [[FBLoginView alloc] initWithReadPermissions:
     @[@"public_profile", @"email", @"user_friends"]];
    loginView.frame=CGRectMake(50, 500, 225, 55);
    loginView.delegate=self;
    [self.view addSubview:loginView];

//delegate method when logged in
- (void)loginViewFetchedUserInfo:(FBLoginView *)loginView
                            user:(id<FBGraphUser>)user {


    NSUserDefaults *defaults=[NSUserDefaults standardUserDefaults];
    [defaults setObject:[user objectForKey:@"id"] forKey:@"LoggedInUserID"] ;


    [self checkandsaveNewUserInBackend:user];




  [self performSegueWithIdentifier:@"Login" sender:self];

}




//logout code
- (IBAction)logoutButtonPressed:(id)sender {

    [FBSession.activeSession closeAndClearTokenInformation];


    [self.navigationController popToRootViewControllerAnimated:YES];
}

推荐答案

在

//logout code
- (IBAction)logoutButtonPressed:(id)sender { 

使用以下代码

 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
    [FBSession.activeSession closeAndClearTokenInformation];

    // If the session state is not any of the two "open" states when the button is clicked
} else {
    // Open a session showing the user the login UI
    // You must ALWAYS ask for public_profile permissions when opening a session
    [FBSession openActiveSessionWithReadPermissions:@[@"public_profile"]
                                       allowLoginUI:YES
                                  completionHandler:
     ^(FBSession *session, FBSessionState state, NSError *error) {
             }];
}

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