直接上代码吧，你竟然搜到了我的文章就应该知道了，为什么要热更新

//app热更新下载
//假定字符串的每节数都在5位以下
function toNum(a) {
    //也可以这样写 var c=a.split(/\./);
    var c = a.split('.');
    var num_place = ["", "0", "00", "000", "0000"],
        r = num_place.reverse();
    for(var i = 0; i < c.length; i++) {
        var len = c[i].length;
        c[i] = r[len] + c[i];
    }
    var res = c.join('');
    return res;
}

var btn = ["确定升级", "取消"];
//获取app系统更新[是否手动点击获取更新]
function appUpdate(Index) {
    console.log('appUpdate');
    mui.plusReady(function() {
        plus.runtime.getProperty(plus.runtime.appid, function(inf) {
            ver = inf.version + '';
            console.log('ver:' + ver);
            var client;
            var ua = navigator.userAgent.toLowerCase();
            if(/iphone|ipad|ipod/.test(ua)) { //苹果手机            
                mui.ajax({
                    type: "get",
                    dataType: 'json',
                    url: "https://itunes.apple.com/lookup?id=1462614850", //获取当前上架APPStore版本信息
                    data: {
                        id: 1462614850 //APP唯一标识ID
                    },
                    contentType: 'application/x-www-form-urlencoded;charset=UTF-8',
                    success: function(data) {
                        console.log('data:' + JSON.stringify(data));
                        var resultCount = data.resultCount;
                        for(var i = 0; i < resultCount; i++) {
                            var normItem = data.results[i].version;
                            console.log('normItem:' + normItem)
                            if(normItem > ver) {
                                var _msg = "发现新版本:V" + normItem;
                                //plus.nativeUI.alert("发现新版本:V" + normItem);
                                mui.confirm(_msg, '升级确认', btn, function(e) {
                                    if(e.index == 0) { //执行升级操作
                                        document.location.href = 'https://itunes.apple.com/cn/app/%E5%AD%A9%E5%84%BF%E6%AC%A2/id1462614850?mt=8'; //上新APPStore下载地址
                                    }
                                });
                                return;
                            }
                        }
                        if(ismanual) {
                            mui.toast('当前版本号已是最新');
                        }
                        return;
                    }
                });
            } else if(/android/.test(ua)) {
                mui.ajax(ip + "APIVApp/SelectVApp", {
                    data: {
                        apkVersion: ver,
                    },
                    dataType: 'json',
                    type: 'get',
                    timeout: 10000,
                    success: function(data) {
                        console.log('data:' + JSON.stringify(data))
                        console.log(toNum(ver))
                        if(toNum(data[0]._vname) > toNum(ver)) {
                            var _msg = "发现新版本:V" + data[0]._vname;
                            mui.confirm(_msg, '升级确认', btn, function(e) {
                                if(e.index == 0) { //执行升级操作
                                    downWgt();
                                }
                            });
                        } else {
                            console.log(Index);
                            if(Index) {
                                mui.toast('当前版本号已是最新');
                            }
                            return;
                        }
                    },
                    error: function(xhr, type, errerThrown) {
                        mui.toast('网络异常,请稍候再试');
                    }
                });
            }
        });
    });
}

// 下载wgt文件
function downWgt() {
    var wgtUrl = ip + "app/H5750CDB5.wgt";
    plus.nativeUI.showWaiting("下载更新文件...");  
    plus.downloader.createDownload(wgtUrl, {
        filename: "_doc/update/"
    }, function(d, status) {    
        if(status == 200) {       
            console.log("下载更新文件成功：" + d.filename);      
            installWgt(d.filename); //安装wgt包
                
        } else {      
            console.log("下载失败！");      
            plus.nativeUI.alert("下载失败！");    
        }    
        plus.nativeUI.closeWaiting();  
    }).start();
}

function installWgt(path) {  
    plus.nativeUI.showWaiting("安装更新文件...");  
    plus.runtime.install(path, {}, function() {    
        plus.nativeUI.closeWaiting();    
        console.log("安装更新文件成功！");    
        plus.nativeUI.alert("应用资源更新完成！", function() {      
            plus.runtime.restart();    
        });  
    }, function(e) {    
        plus.nativeUI.closeWaiting();    
        console.log("安装更新文件失败[" + e.code + "]：" + e.message);    
        plus.nativeUI.alert("安装更新文件失败[" + e.code + "]：" + e.message);    
        if(e.code == 10) {    
            alert('请清除临时目录');    
        }  
    });
}