wx.request({
            url: \'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=AppSecret\',
            method: \'get\',
            header: {
                \'content-type\': \'application/json\' // 默认值
            },
            success:(res)=> {
              console.log(res.data.access_token);
            }
        })

let that = this
              wx.request({
                url: \'https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token=\'+res.data.access_token,
                method: \'POST\',
                header: {
                    \'content-type\': \'application/json\' // 默认值
                },
                data:{
                    \'path\': "/page/index/index?openid=11", // 携参数openid
                    "width":100//非必填
                },
                responseType: \'arraybuffer\', // arraybuffer是以数组的语法处理二进制数据，称为二进制数组。
                success: function(res) {
                  let data = wx.arrayBufferToBase64(res.data);
                  console.log(\'data:image/png;base64,\' +data);
                  that.setData({
                    myCode: \'data:image/png;base64,\' +data
                  })
                  
                }
            })

<image src="{{myCode}}"></image>