iOS中cookie的保存与恢复

保存cookie：

- (void)saveCookies{    NSData *cookiesData = [NSKeyedArchiver archivedDataWithRootObject: [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies]];    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];    [defaults setObject: cookiesData forKey: @"sessionCookies"];    [defaults synchronize];    }

恢复cookie：

- (void)loadCookies{    NSArray *cookies = [NSKeyedUnarchiver unarchiveObjectWithData: [[NSUserDefaults standardUserDefaults] objectForKey: @"sessionCookies"]];    NSHTTPCookieStorage *cookieStorage = [NSHTTPCookieStorage sharedHTTPCookieStorage];        for (NSHTTPCookie *cookie in cookies){        [cookieStorage setCookie: cookie];    }    }