Facebook-iOS-Sdk每次启动我的应用程序时，我如何关闭活动会话，或者在杀死应用程序后，它会为我提供以前的登录会话详细信息。当我点击 facebook 按钮时。我已经使用了所有东西[appDelegate.session closeAndClearTokenInformation];
[FBSession.activeSession close]; [FBSession.activeSession closeAndClearTokenInformation]..但是活动会话仍然没有关闭..如何在点击时关闭上一个会话数据。
我使用下面的代码来清除，但是每当我单击 facebook 按钮开始新会话时，它都会让我返回以前的凭据。
- (IBAction)buttonClickHandler:(id)sender {
appDelegate = [[UIApplication sharedApplication]delegate];
// this button's job is to flip-flop the session from open to closed
if (appDelegate.session.isOpen) {
[appDelegate.session closeAndClearTokenInformation];
[FBSession.activeSession close];
[FBSession.activeSession closeAndClearTokenInformation];
FBSession.activeSession=nil;
} else {
if (appDelegate.session.state != FBSessionStateCreated) {
// Create a new, logged out session.
appDelegate.session = [[FBSession alloc] init];
}
// if the session isn't open, let's open it now and present the login UX to the user
[FBSession.activeSession closeAndClearTokenInformation];
FBSession.activeSession=nil;
[FBSession.activeSession openWithBehavior:FBSessionLoginBehaviorForcingWebView
completionHandler:^(FBSession *session,
FBSessionState state,
NSError *error) {
// and here we make sure to update our UX according to the new session state
NSLog(@" state=%d",state);
[FBRequestConnection
startForMeWithCompletionHandler:^(FBRequestConnection *connection,
id<FBGraphUser> user,
NSError *error) {
userInfo = @"";
// Example: typed access (name)
// - no special permissions required
userInfo = user.username;
NSLog(@"string %@", userInfo);
[self checkfacebook];
}];
}]; }
}
并在ViewDidLoad
- (void)viewDidLoad
{
[super viewDidLoad];
AppDelegate *appDelegate = [[UIApplication sharedApplication]delegate];
if (!appDelegate.session.isOpen) {
// create a fresh session object
appDelegate.session = [[FBSession alloc] init];
if (appDelegate.session.state == FBSessionStateCreatedTokenLoaded) {
// even though we had a cached token, we need to login to make the session usable
[FBSession.activeSession close];
FBSession.activeSession=nil;
}
}
NSHTTPCookieStorage* cookies = [NSHTTPCookieStorage sharedHTTPCookieStorage];
NSArray* facebookCookies = [cookies cookiesForURL:[NSURL URLWithString:@"http://login.facebook.com"]];
for (NSHTTPCookie* cookie in facebookCookies) {
[cookies deleteCookie:cookie];
}
}