uniapp 版本检查更新

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！