iOS UIWebView重定向Cookie

     // 1. 取出当前的cookies
     NSArray<NSHTTPCookie *> *cookies = [NSHTTPCookieStorage sharedHTTPCookieStorage].cookies;
     // 2. 取出需要同步到的地址url
     BESTHttpItem *httpItem = [BESTHttpHelper sharedHelper].curHttpItem;
     NSString  *url = [NSString stringWithFormat:@"%@/#/login", httpItem.frontend_addr];

     // 3. 遍历cookies
     for (NSHTTPCookie *cookie in cookies) {
         // 4. 设置header的cookie信息
         NSString *cookieString = [[NSString alloc] initWithFormat:@"%@=%@",[cookie name],[cookie value]];
         NSDictionary *setCookieDic = [NSDictionary dictionaryWithObject:cookieString forKey:@"Set-Cookie"];
         NSArray *headeringCookie = [NSHTTPCookie cookiesWithResponseHeaderFields:setCookieDic forURL:[NSURL URLWithString:url]];

         // 5. 通过setCookies方法，完成设置，这样只要一访问URL为HOST的网页时，会自动附带上设置好的header
         [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookies:headeringCookie
                                                            forURL:[NSURL URLWithString:url]
                                                   mainDocumentURL:nil];
     }