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];
    }