//cookies获取
    NSHTTPCookieStorage *cookieJar = [NSHTTPCookieStorage sharedHTTPCookieStorage];
    NSArray *cookieArr = [cookieJar cookies];
    for(NSHTTPCookie *cookie in cookieArr) {
         NSLog(@"cookie －> %@", cookie);
         if ([cookie.name isEqualToString:@"access_token"]) {
                //存储cookies
               [MyDataSaveHelper setAccessToken:cookie.value];

          }
         //存储之后删除cookies
         [cookieJar deleteCookie:cookie];
    }