微信小程序生成 指定页面（房源链接）小程序二维码 | 小程序专属码

 /**
     * 生成指定页面小程序二维码（小程序专属码）
     */
    qrcodeFn();
    function qrcodeFn() {
      wx.request({
        url: 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=小程序id&secret=小程序密钥',
        complete: function(tokenRes) {
          wx.request({
            url: 'https://api.weixin.qq.com/wxa/getwxacodeunlimit?access_token=' + tokenRes.data.access_token,
            method: 'POST',
            data: {
              scene: 1012,
              // 是否为Png，默认jpeg
              is_hyaline: true,
              // 是否自动取色
              auto_color:true,
              page: 'pages/other/website/index',
            },
            responseType: 'arraybuffer',
            complete: function(res) {
            // 自动复制到剪切板
              wx.setClipboardData({
                data: wx.arrayBufferToBase64(res.data),
                success(res) {}
              })
              console.log(wx.arrayBufferToBase64(res.data));
            },
          })
        },
      });
    }

复制的base64 数据，可在小程序image标签src属性里显示