/*
     * 生成活动分享页二维码*/
    public function buildImgIndex()
    {
        try{
            $unionid = post(\'unionid\');
            $fileName = $unionid.\'.png\';
            $fileData = WidRead($fileName);
            if($fileData){
                echo $this->img_uri($fileData);exit;
            }else{
                $TokenData = getAccessToken();
                if($TokenData[\'code\'] == 200){
                    $accessToken = $TokenData[\'data\'][\'access_token\'];
                }else{
                    echo jsonOut(returnArr(410,\'\',\'error\'));exit;
                }
                $page = "pages/activityflower/activityflower";
                $scene = "unionid=".$unionid;
      $path = "https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=".$accessToken;
                $parameter = array(
                    "access_token" => $accessToken,
                    \'scene\' => $scene,  //绑定该用户的unionid
                    \'page\' => $page,
                    \'auto_color\'=>false,
                    \'width\'=>430
                );
                $parameter = json_encode($parameter);
                $curl = new \Curl\Curl();
                $curl->setHeader(\'content-type\',\'application/json; charset=utf-8\');
                $curl->setOpt(CURLOPT_SSL_VERIFYPEER,false);
                $curl->setOpt(CURLOPT_SSL_VERIFYHOST,false);
                $curl->post($path,$parameter);
                if($curl->error){
                    $error_message = $curl->error_message;
                    $error_code = $curl->error_code;
                    $response = $curl->response_headers;
                    $param[\'response\'] = $response;
                    $param[\'code\'] = $error_code;
                    $param[\'msg\'] = $error_message;
                    $param[\'contents\'] = "coin connect  error";
                    $curl->close();
                    echo jsonOut(returnArr(400,\'\',\'\'));
                }else{
                    $data = $curl->response;  //返回图片文件流
                    $curl->close();
                }
                $dataJson = json_decode($data);//如果成功返回文件流 json_decode为null,其他就自带微信的错误返回
                if($dataJson == null){
                    WidWrite($fileName,$data);
                    echo $this->img_uri($data);exit;
                }else{
                    echo jsonOut(returnArr(400,\'\',\'\'));exit;
                }
            }
        }catch(\Exception $e){
            $res = array("code" => $e->getCode(), \'msg\' => $e->getMessage());
            echo jsonOut(returnArr(400, $res, \'error\'));exit;
        }
    }
 
 
    /*
     * 二进制转图片image/png
     * */
    public function img_uri($contents, $mime ="image/png")
    {
        $base64   = base64_encode($contents);
        return (\'data:\' . $mime . \';base64,\' . $base64);
    }