Solution to Facebook ios sdk failure to log out of the bug

Let's talk about how to jump to safari in the Facebook ios sdk and log on to the app.

//  UIDevice *device = [UIDevice currentDevice];//  if ([device respondsToSelector:@selector(isMultitaskingSupported)] && [device isMultitaskingSupported]) {//    if (tryFBAppAuth) {//      NSString *scheme = kFBAppAuthURLScheme;//      if (_urlSchemeSuffix) {//        scheme = [scheme stringByAppendingString:@"2"];//      }//      NSString *urlPrefix = [NSString stringWithFormat:@"%@://%@", scheme, kFBAppAuthURLPath];//      NSString *fbAppUrl = [FBRequest serializeURL:urlPrefix params:params];//      didOpenOtherApp = [[UIApplication sharedApplication] openURL:[NSURL URLWithString:fbAppUrl]];//    }////    if (trySafariAuth && !didOpenOtherApp) {//      NSString *nextUrl = [self getOwnBaseUrl];//      [params setValue:nextUrl forKey:@"redirect_uri"];////      NSString *fbAppUrl = [FBRequest serializeURL:loginDialogURL params:params];//      didOpenOtherApp = [[UIApplication sharedApplication] openURL:[NSURL URLWithString:fbAppUrl]];//    }//  }

In the facbook. M file, just comment out the above section. My versions are from lines 241 to 260.

Next, let's talk about the cause of logout failure. First, let's look at the method called during logout:

- (void)logout {    [self invalidateSession];            if ([self.sessionDelegate respondsToSelector:@selector(fbDidLogout)]) {        [self.sessionDelegate fbDidLogout];    }}

- (void)invalidateSession {    self.accessToken = nil;    self.expirationDate = nil;        NSHTTPCookieStorage* cookies = [NSHTTPCookieStorage sharedHTTPCookieStorage];    NSArray* facebookCookies = [cookies cookiesForURL:                                [NSURL URLWithString:@"http://login.facebook.com"]];        for (NSHTTPCookie* cookie in facebookCookies) {        [cookies deleteCookie:cookie];    }}

At this time we found that he just destroyed the cookie under the http://login.facebook.com, so our account sometimes can not log out normally, because he did not destroy the cookie under the https://login.facebook.com !, Therefore, we need to add the following code in invalidatesession:

NSArray* facebookCookies1 = [cookies cookiesForURL:                                [NSURL URLWithString:@"https://login.facebook.com"]];        for (NSHTTPCookie* cookie in facebookCookies1) {        [cookies deleteCookie:cookie];    }

For the sake of simplicity, I added 1. Do not name it like this!