uni-app写app点击app的分享，分享至微信，在微信中点击分享卡片打开小程序并跳转至相应页面

uni-app写的app
// 分享小程序
        async handleShare(index) {
            let _this = this;

            setTimeout(() => {
                this.drawCanvas();
                setTimeout(async () => {
                    this.canvasFlag = false;
                }, 4000);
            }, 100);
            this.canvasFlag = true;
        },
        drawCanvas() {
            let _this = this;
            this.$nextTick(async () => {
                //初始化
                await this.$refs.rCanvas
                    .init({
                        canvas_id: 'rCanvas',
                        canvas_width: 399,
                        canvas_height: 299,
                        background_color: '#fff',
                        position: 'fixed',
                        top: 50,
                        left: 50
                    })
                    .catch(err_msg => {
                        uni.showToast({
                            title: err_msg,
                            icon: 'none'
                        });
                    });
                console.log('_this.detail.info.factorycategory', _this.$config.imgBaseUrl);
                //画图片   暂时隐藏
                await this.$refs.rCanvas
                    .drawImage({
                        url: _this.$config.imgBaseUrl + 'share_bg.png',
                        x: -12,
                        y: 0,
                        w: 399,
                        h: 299
                    })
                    .catch(err_msg => {
                        uni.showToast({
                            title: err_msg,
                            icon: 'none'
                        });
                    });

                // 画文字
                //、文字的第一行
                await this.$refs.rCanvas
                    .drawSpecialText({
                        general: {
                            x: 80,
                            y: 35
                        },
                        list: [
                            {
                                text: _this.detail.info.title,
                                font_color: '#000',
                                font_size: 15,
                                text_align: 'center',
                                font_weight: 'bold'
                            }
                        ]
                    })
                    .catch(err_msg => {
                        uni.showToast({
                            title: err_msg,
                            icon: 'none'
                        });
                    });
                await this.$refs.rCanvas
                    .drawSpecialText({
                        general: {
                            x: 140,
                            y: 35
                        },
                        list: [
                            {
                                text: '|',
                                font_color: '#666',
                                font_size: 10,
                                text_align: 'center',
                                font_weight: 'bold'
                            }
                        ]
                    })
                    .cat