getAccessToken(){  //获取access_token
            this.$httpRequest('POST','/getAccessToken').then(res=>{
                if(res&&res.status==200){
                    this.shareToken = res.access_token;
                    this.getWxCode(res.access_token)
                }
            })
        },
        getWxCode(shareToken) {  //获取小程序码
            let that = this
            uni.showLoading({
                title: '加载中',
                mask: true
            })
            uni.request({
                url: `https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token=${shareToken}`,
                method: "POST",
                data: {
                    access_token:shareToken,
                    width: 280,
                    path: 'pages/detail/detail?data='+this.detaiId
                },
                responseType: 'arraybuffer',
                success: function(res) {
                    uni.hideLoading();
                    let src = uni.arrayBufferToBase64(res.data);
                    that.codeImg = 'data:image/png;base64,' + src;
                }
            })
        },