uni-app的热更新功能

本功能结合一个大佬的功能，进行修改，此本也感谢大佬指点；

import config from "./config.js"

var UpdateVersion = function (){
    this.version = config.version
    this.updateApi =config.download
    this.runEnv=config.runEnv
}

UpdateVersion.prototype = {
    //版本号对比, curV 大于 reqV返回true
    compare: function(curV, reqV){
        if(curV && reqV){
          //将两个版本号拆成数字
          var arr1 = curV.split('.'),
              arr2 = reqV.split('.');
          var minLength = Math.min(arr1.length, arr2.length),
              position = 0,
              diff = 0;
          //依次比较版本号每一位大小，当对比得出结果后跳出循环
          while(position < minLength && ((diff=parseInt(arr1[position]) - parseInt(arr2[position])) == 0)){
              position++;
          }
          diff = (diff!=0) ? diff : (arr1.length-arr2.length);
          return diff > 0;
        }else{
          console.log('版本号不能为空');
          return false;
       }
    },
    //热更新检测
    getNewData: function(type){
        var _this = this  // plus.runtime.appid获取版本号的；
        if(plus && plus.runtime.appid == 'HBuilder' || true){
            
            uni.request({
                url: _this.updateApi+"/version.json",
                method: 'GET',
                success: (resR)=>{
                    var res = resR.data
                    
                    if(_this.runEnv!==res.runEnv){
                        plus.nativeUI.toast("环境错误：当前APP环境为开发环境，无法更新")
                    }else{
                        if(_this.compare(res.version, _this.version)){
                            getApp().globalData.ifUpdate = true
                            //弹出更新提示
                             //version 最新版的版本号
                             //url 最新版的热更新地址
                             //force_update 是否强制更新
                             //runEnv  版本类型
                            var downUrl =_this.updateApi+"/"+ res.url
                            
                            if(!/\.wgt$/.test(res.url)){
                                _this.alertUpdateTips(downUrl, res.force_update,true)
                            }else{
                                _this.alertUpdateTips(downUrl, res.force_update)
                            }
                            
                        }else{
                            if(type){
                                plus.nativeUI.toast("当前已经是最新版本")
                            }
                            getApp().globalData.ifUpdate = false
                        } 
                    }
                    
                }
            })
        }else{
            console.log('当前环境不检测版本')
            if(type){
                uni.showToast({
                    title: "当前已经是最新版本",
                    icon: 'none'
                })
            }
        }
    },
    //弹出更新提示
    alertUpdateTips: function(url, forced_update, isDownloadPack){
        var _this = this
        if(forced_update == '1'){
            plus.nativeUI.alert('已检测到新版本，该版本有重大更新，请立即更新!', function(){
                isDownloadPack ? (_this.updatePackage(url)) : (_this.downloadPack(url))
            }, "更新提示", "立即更新");
        }else{
            plus.nativeUI.confirm("!已检测到新版本，是否立即更新!", function(e){
                if(e.index == 0){
                    //下载安装包
                    isDownloadPack ? (_this.updatePackage(url)) : (_this.downloadPack(url))
                }
            }, "更新提示", ["确定", "取消"])
        }
    },
    //下载安装包
    downloadPack: function(url){
        
        var _this = this
        var w = plus.nativeUI.showWaiting('下载更新中，请勿关闭');
        var totalSize = 0
        var dtask = plus.downloader.createDownload(url, { method: 'GET', filename: '_downloads/'},function(d,status){
            plus.nativeUI.closeWaiting();
            if(status == 200){
                _this.installPack(d.filename);
            }else{//下载失败
                plus.nativeUI.closeWaiting();
                plus.nativeUI.toast('下载失败');
            }
        });
        dtask.addEventListener("statechanged", function(download, status){
            if(download.state == 2){
                totalSize = download.totalSize
                totalSize = Math.round(parseInt(totalSize) / (1024 * 1024 / 100)) / 100
            }
            if(download.state == 3 && download.totalSize){
                //已下载 download.downloadedSize
                //任务大小 download.totalSize
                totalSize = download.totalSize
                totalSize = Math.round(parseInt(totalSize) / (1024 * 1024 / 100)) / 100
                var ds = Math.round(parseInt(download.downloadedSize) / (1024 * 1024 / 100)) / 100
                if(ds && totalSize){
                    w.setTitle(`更新进度:${ds}M/${totalSize}M`);
                }
            }
        }, false);
        dtask.start();
    },
    //安装
    installPack: function(path){
        var _this = this
        plus.nativeUI.showWaiting('安装更新文件中...');
        plus.runtime.install(path,{},function(){
            plus.nativeUI.closeWaiting();
            _this.tipReload()
        },function(e){
            plus.nativeUI.closeWaiting();
            plus.nativeUI.toast( '安装失败')
        });
    },
    //提示重启
    tipReload: function(){
        
        if(plus.os.name == 'Android'){
            plus.nativeUI.alert('最新版安装完成，请立即重启', function(e){
                if(e.index == 0){
                    plus.runtime.restart();
                }
            }, '重启提示', '立即重启')
        }else{
            plus.nativeUI.alert('更新成功,重启APP后即可使用最新版！'); 
        }
    },
    //整包更新
    updatePackage (url){
        getApp().globalData.ifUpdate = false
        if(/\.apk$/.test(url)){
            this.downloadPack(url)
        }else{
            plus.runtime.openURL(url)
        }
    }
}

export default UpdateVersion
/*
import UpdateVersion from './utils/update.js'

//#ifdef APP-PLUS
var v = new UpdateVersion()
v.getNewData()
//#endif

*/

main.js

import Vue from 'vue'
import App from './App'
import UpdateVersion from "base/update.js"
//#ifdef APP-PLUS
const v = new UpdateVersion()
v.getNewData()
//#endif

App.mpType = 'app'

const app = new Vue({
    ...App
})
app.$mount()