yueke/application/index/controller/Appdown.php

<?php

namespace app\index\controller;

use think\Controller;


class Appdown extends Controller
{

    /**
     * app下载页
     * 判断是安卓还是ios
     */
    public function index() {

        $layout = 'index';

        if(request()->isMobile())
        {
            $layout = 'h5';
        }

        $this->view->assign('android_apkUrl', config("site.android_apkUrl"));
        $this->view->assign('ios_downurl', config('site.ios_downurl'));

        //手机端二维码
        $url = config('website_url').'/index/appdown';
        $qrcode = $this->inviteimage($url);
        $this->view->assign('qrcode',$qrcode);


        return $this->view->fetch($layout);
    }

    private function inviteimage($text) {
        $params['text'] = $text;
        $qrcode_service = \addons\qrcode\library\Service::qrcode($params);
//        $mimetype = 'image/png';
//        $response = Response::create()->header("Content-Type", $mimetype);

        // 直接显示二维码
//        header('Content-Type: ' . $qrcode_service->getContentType());
//        $response->content($qrcode_service->writeString());
        $qrcodePath = ROOT_PATH . 'public/uploads/qrcode/';
        if (!is_dir($qrcodePath)) {
            @mkdir($qrcodePath);
        }
        if (is_really_writable($qrcodePath)) {
            $filename = md5(implode('', $params)) . '.png';
            $filePath = $qrcodePath . $filename;
            $qrcode_service->writeFile($filePath);
        }

        return '/uploads/qrcode/' . $filename;
    }



}