uiwebview清理cookie

NSHTTPCookieStorage* cookies = [NSHTTPCookieStorage sharedHTTPCookieStorage];
NSArray* baiduCookies = [cookies cookiesForURL: [NSURL URLWithString:@"http://www.baidu.com"]];
       

 for (NSHTTPCookie* cookie in facebookCookies) {
            [cookies deleteCookie:cookie];
        }