H5判斷當前手機使用的是安卓還是ios,並檢測是否是微信登陸,給予app下載地址

<script type="text/javascript">
    // 獲取當前用戶掃描的設備
    window.onload = function () {
        checkPhone();
    }
    /* 判斷用戶手機爲安卓還是iphone */
    var checkPhone = function () {
        var _this = this
        /* 判斷是否爲微信環境 */
        this.isWeiXin = navigator.userAgent.toLowerCase().indexOf('micromessenger') > -1 ? true : false;

        if (_this.isWeiXin) {
            $(".mask").css("display", "block");
            return
        }
        var agent = (navigator.userAgent || navigator.vendor || window.opera)
        if (agent != null) {
            var agentName = agent.toLowerCase()
            if (/android/i.test(agentName)) {
                _this.isAndroid = true
            } else if (/iphone/i.test(agentName)) {
                _this.isIOS = true
            }
        }
    }
    var apkUrl = "";
    // 獲取下載app地址
    $(document).delegate(".downloadApp", "click", function (e) {
        var versionType = $(this).attr("versionType");

        var ajaxobj = {
            type: "get",
            ajaxName: ajaxUrl.getAppListErWeiMa,
        };
        var params = {
            "versionType": versionType,
        };
        getdata(ajaxobj, params, function (data) {
            console.log(data);
            if (data.resultnum === "0000") {
                apkUrl = data.resultdata[0].apkURL;
                downloadApp();
            } else {
                console.log("獲取數據錯誤")
            }
        });
    });

    /* 點擊下載按鈕 */
    var downloadApp = function () {
        // 微信環境
        let _this = this
        checkPhone()
        let agent = (navigator.userAgent || navigator.vendor || window.opera)
        if (agent != null) {
            if (_this.isAndroid) {
                // alert(apkUrl);
                // 安卓包下載地址
                window.location.href = apkUrl;
            } else {
                alert("暫不支持此設備，敬請期待~");
            }
        }
    }
</script>