总体来说uniapp的跨平台还是很不错的，虽然里面各种坑要去踩，但是踩坑也是开发人员的必修课和成长路。
这不，今天就来研究了一下版本检查更新就踩到坑了。。。先来看看检查更新及下载、安装的实现。
先来看看页面：
从左到右依次为检查到版本更新，下载安装过程，下载完成提示安装。
来看看uniapp的代码实现：
在启动页面或者是你认为合适的页面添加以下方法并调用：
checkVersion() {
//模拟接口获取最新版本号，版本号固定为整数
let platform = uni.getSystemInfoSync().platform.toLocaleLowerCase() //手机平台
//根据你们的检查接口来具体书写，我们是根据包名来管理检查的
let pname = null
if (platform == 'ios') {
pname = '你的IOS包名'
} else {
pname = '你的安卓包名'
}
let self = this
//云打包时读取版本号
plus.runtime.getProperty(plus.runtime.appid, function(wgtinfo) {
//调用接口服务获取线上版本信息
getVersion(pname).then(res => {
const newVersionName = res.versionName //线上最新版本名
const newVersionCode = res.versionCode; //线上最新版本号
const selfVersionCode = parseInt(wgtinfo.versionCode) //当前App版本号
const durl = res.url
let isForceUpdate = res.type == 2
//线上版本号高于当前，进行在线升级
if (selfVersionCode < newVersionCode) {
uni.hideLoading()
self.pushActivity('/pages/index/versionUpgrade', {
'downloadUrl': durl,
'versionName': newVersionName,
'isForceUpdate': isForceUpdate,
'versionDesc': res.updateRecord,
'platForm': platform
})
}
})
});
}创建页面versionUpgrade.vue，粘贴以下内容：
<template>
<view class="upgrade-popup">
<image class="header-bg" src="../../static/upgrade_bg.png" mode="widthFix"></image>
<i v-if="!isForceUpdate && isStartDownload" class="cuIcon-close close-btn" @click="handleClose"></i>
<view class="main">
<view class="version">发现新版本{{versionName}}</view>
<view class="content">
<text class="title">更新内容</text>
<view class="desc" v-html="versionDesc"></view>
</view>
<!--下载状态-进度条显示 -->
<view class="footer" v-if="isStartDownload">
<view class="progress-view" :class="{'active':!hasProgress}" @click="handleInstallApp">
<!-- 进度条 -->
<view v-if="hasProgress" style="height: 100%;">
<view class="txt">{{percentText}}</view>
<view class="progress" :style="setProStyle"></view>
</view>
<view v-else>
<view class="btn upgrade force">{{ isDownloadFinish ? '立即安装' :'下载中...'}}</view>
</view>
</view>
</view>
<!-- 强制更新 -->
<view class="footer" v-else-if="isForceUpdate">
<view class="btn upgrade force" @click="handleUpgrade">立即更新</view>
</view>
<!-- 可选择更新 -->
<view class="footer" v-else>
<view class="btn close" @click="handleClose">以后再说</view>
<view class="btn upgrade" @click="handleUpgrade">立即更新</view>
</view>
</view>
</view>
</template>
<script>
import {
downloadApp,
installApp
} from './versionUpgrade.js'
import {
cndUrl
} from '../../api/api.js'
export default {
data() {
return {
platForm: null,
isForceUpdate: false, //是否强制更新
versionName: '', //版本名称
versionDesc: '', //更新说明
downloadUrl: '', //APP下载链接
isDownloadFinish: false, //是否下载完成
hasProgress: false, //是否能显示进度条
currentPercent: 0, //当前下载百分比
isStartDownload: false, //是否开始下载
fileName: '', //下载后app本地路径名称
}
},
computed: {
//设置进度条样式，实时更新进度位置
setProStyle() {
return {
width: (510 * this.currentPercent / 100) + 'rpx' //510：按钮进度条宽度
}
},
//百分比文字
percentText() {
let percent = this.currentPercent;
if (typeof percent !== 'number' || isNaN(percent)) return '下载中...'
if (percent < 100) return `下载中${percent}%`
return '立即安装'
}
},
onLoad(op) {
let data = JSON.parse(op.data)
this.platForm = data.platForm
this.versionName = data.versionName; //版本名称
this.versionDesc = data.versionDesc; //更新说明
this.downloadUrl = data.downloadUrl; //下载链接
this.isForceUpdate = data.isForceUpdate; //是否强制更新
},
onBackPress(options) {
// 禁用返回
if (options.from == 'backbutton') {
return true;
}
},
methods: {
//更新
handleUpgrade() {
if (this.downloadUrl) {
if (this.platForm != 'ios') {
this.isStartDownload = true
let durl = cndUrl() + '/' + this.downloadUrl
//开始下载App
downloadApp(durl, current => {
//下载进度监听
this.hasProgress = true
this.currentPercent = current
}).then(fileName => {
//下载完成
this.isDownloadFinish = true
this.fileName = fileName
if (fileName) {
//自动安装App
this.handleInstallApp()
}
}).catch(e => {
console.log(e, 'e')
})
}
//IOS无法在线升级提示到商店下载
else {
// const appId = '6476550601';
// const appUrl = `https://apps.apple.com/app/id${appId}`;
// uni.navigateTo({
// url: `/common/webview?url=${encodeURIComponent(appUrl)}`
// });
uni.navigateTo({
url: `/common/webview?url=${encodeURIComponent(this.downloadUrl)}`
});
}
} else {
uni.showToast({
title: '下载链接不存在',
icon: 'none'
})
}
},
//安装app
handleInstallApp() {
//下载完成才能安装，防止下载过程中点击
if (this.isDownloadFinish && this.fileName) {
installApp(this.fileName, () => {
//安装成功,关闭升级弹窗
uni.navigateBack()
})
}
},
//关闭返回
handleClose() {
uni.navigateBack()
},
}
}
</script>
<style>
page {
background-color: transparent;
background: rgba(0, 0, 0, 0.5);
/**设置窗口背景半透明*/
}
</style>
<style lang="scss" scoped>
.upgrade-popup {
width: 580rpx;
height: auto;
position: fixed;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
background: #fff;
border-radius: 20rpx;
box-sizing: border-box;
border: 1px solid #eee;
}
.close-btn{
position: absolute;
right: 10rpx;
font-size: 52rpx;
color: gray;
}
.header-bg {
width: 100%;
margin-top: -112rpx;
}
.main {
padding: 10rpx 30rpx 30rpx;
box-sizing: border-box;
.version {
font-size: 36rpx;
color: #026DF7;
font-weight: 700;
width: 100%;
text-align: center;
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
letter-spacing: 1px;
}
.content {
margin-top: 60rpx;
.title {
font-size: 28rpx;
font-weight: 700;
color: #000000;
}
.desc {
box-sizing: border-box;
margin-top: 20rpx;
font-size: 28rpx;
color: #6A6A6A;
max-height: 80vh;
overflow-y: auto;
}
}
.footer {
width: 100%;
display: flex;
justify-content: center;
align-items: center;
position: relative;
flex-shrink: 0;
margin-top: 100rpx;
.btn {
width: 246rpx;
display: flex;
justify-content: center;
align-items: center;
position: relative;
z-index: 999;
height: 96rpx;
box-sizing: border-box;
font-size: 32rpx;
border-radius: 10rpx;
letter-spacing: 2rpx;
&.force {
width: 500rpx;
}
&.close {
border: 1px solid #E0E0E0;
margin-right: 25rpx;
color: #000;
}
&.upgrade {
background-color: #026DF7;
color: white;
}
}
.progress-view {
width: 510rpx;
height: 90rpx;
display: flex;
position: relative;
align-items: center;
border-radius: 6rpx;
background-color: #dcdcdc;
display: flex;
justify-content: flex-start;
padding: 0px;
box-sizing: border-box;
border: none;
overflow: hidden;
&.active {
background-color: #026DF7;
}
.progress {
height: 100%;
background-color: #026DF7;
padding: 0px;
box-sizing: border-box;
border: none;
border-top-left-radius: 10rpx;
border-bottom-left-radius: 10rpx;
}
.txt {
font-size: 28rpx;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
color: #fff;
}
}
}
}
</style>创建versionUpgrade.js，与versionUpgrade.vue放在同一个目录中！将以下内容粘贴到versionUpgrade.js中！
/**
* @description H5+下载App
* @param downloadUrl:App下载链接
* @param progressCallBack:下载进度回调
*/
export const downloadApp = (downloadUrl, progressCallBack = () => {}, ) => {
return new Promise((resolve, reject) => {
//创建下载任务
const downloadTask = plus.downloader.createDownload(downloadUrl, {
method: "GET"
}, (task, status) => {
console.log(status,'status')
if (status == 200) { //下载成功
resolve(task.filename)
} else {
reject('fail')
uni.showToast({
title: '下载失败',
duration: 1500,
icon: "none"
});
}
})
//监听下载过程
downloadTask.addEventListener("statechanged", (task, status) => {
switch (task.state) {
case 1: // 开始
break;
case 2: //已连接到服务器
break;
case 3: // 已接收到数据
let hasProgress = task.totalSize && task.totalSize > 0 //是否能获取到App大小
if (hasProgress) {
let current = parseInt(100 * task.downloadedSize / task.totalSize); //获取下载进度百分比
progressCallBack(current)
}
break;
case 4: // 下载完成
break;
}
});
//开始执行下载
downloadTask.start();
})
}
/**
* @description H5+安装APP
* @param fileName:app文件名
* @param callBack:安装成功回调
*/
export const installApp = (fileName, callBack = () => {}) => {
//注册广播监听app安装情况
onInstallListening(callBack);
//开始安装
plus.runtime.install(plus.io.convertLocalFileSystemURL(fileName), {}, () => {
//成功跳转到安装界面
}, function(error) {
uni.showToast({
title: '安装失败',
duration: 1500,
icon: "none"
});
})
}
/**
* @description 注册广播监听APP是否安装成功
* @param callBack:安装成功回调函数
*/
const onInstallListening = (callBack = () => {}) => {
let mainActivity = plus.android.runtimeMainActivity(); //获取activity
//生成广播接收器
let receiver = plus.android.implements('io.dcloud.android.content.BroadcastReceiver', {
onReceive: (context, intent) => { //接收广播回调
plus.android.importClass(intent);
mainActivity.unregisterReceiver(receiver); //取消监听
callBack()
}
});
let IntentFilter = plus.android.importClass('android.content.IntentFilter');
let Intent = plus.android.importClass('android.content.Intent');
let filter = new IntentFilter();
filter.addAction(Intent.ACTION_PACKAGE_ADDED); //监听APP安装
filter.addDataScheme("package");
mainActivity.registerReceiver(receiver, filter); //注册广播
}我使用的是这个UI，你可以用也可以换掉！
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