1.蘋果手機在微信支付寶內置瀏覽器打開能都直接跳轉到appstroe去下載應用
2.安卓手機在微信支付寶內置瀏覽器打開不能直接下載，需彈出浮層指導用戶通過瀏覽器打開

 downApp() {
            let ua = navigator.userAgent.toLowerCase();
            let userAgent = navigator.userAgent.toLowerCase();
            //android終端
            let isAndroid =
                ua.indexOf("Android") > -1 || ua.indexOf("Adr") > -1; //ios終端
            let isiOS = !!ua.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/);
            if (isWeixinBrowser()) {
                if (/(iPhone|iPad|iPod|iOS)/i.test(navigator.userAgent)) {
                    window.location =
                        "https://itunes.apple.com/cn/app/id1361038837";
           
                } else if (/(Android)/i.test(navigator.userAgent)) {         
                    this.showWx = true;
                }
            } else if (userAgent.match(/Alipay/i) == "alipay") {
                if (/(iPhone|iPad|iPod|iOS)/i.test(navigator.userAgent)) {
                    window.location =
                        "https://itunes.apple.com/cn/app/id1361038837";

                 
                } else if (/(Android)/i.test(navigator.userAgent)) {
                    //android
                    this.showWx = true;
                }
            } else {
                if (/(iPhone|iPad|iPod|iOS)/i.test(navigator.userAgent)) {
                    //ios
                    // this.ShowPop = !this.ShowPop;
                    // this.ShowDark = !this.ShowDark;
                    window.location =
                        "https://itunes.apple.com/cn/app/id1361038837";

                    // alert("ios")
                } else if (/(Android)/i.test(navigator.userAgent)) {
                    //android
                    window.location =
                        "http://pda.aixuepai.com.cn:9998/apk/amapp-ali.apk";
                }
            }

            function isWeixinBrowser() {
                return /micromessenger/.test(ua) ? true : false;
            }
        }