初始化代码

front/uni_modules/uni-upgrade-center-app/pages/upgrade-popup.json

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+{
+  "disableScroll": true,
+  "usingComponents": {}
+}

front/uni_modules/uni-upgrade-center-app/pages/upgrade-popup.wxml

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+<view class="mask flex-center"><view class="content botton-radius"><view class="content-top"><text class="content-top-text">{{title}}</text><image class="content-top" style="top:0;" width="100%" height="100%" src="../images/bg_top.png"></image></view><view class="content-header"></view><view class="content-body"><view class="title"><text>{{subTitle}}</text></view><view class="body"><scroll-view class="box-des-scroll" scroll-y="true"><text class="box-des">{{''+contents+''}}</text></scroll-view></view><view class="footer flex-center"><block wx:if="{{isAppStore}}"><button class="content-button" style="border:none;color:#fff;" plain="{{true}}" data-event-opts="{{[['tap',[['jumpToAppStore',['$event']]]]]}}" bindtap="__e">{{''+downLoadBtnTextiOS+''}}</button></block><block wx:else><block wx:if="{{!downloadSuccess}}"><block wx:if="{{downloading}}"><view class="progress-box flex-column"><progress class="progress" border-radius="35" percent="{{downLoadPercent}}" activeColor="#3DA7FF" show-info="{{true}}" stroke-width="10"></progress><view style="width:100%;font-size:28rpx;display:flex;justify-content:space-around;"><text>{{downLoadingText}}</text><text>{{"("+downloadedSize+"/"+packageFileSize+"M)"}}</text></view></view></block><block wx:else><button class="content-button" style="border:none;color:#fff;" plain="{{true}}" data-event-opts="{{[['tap',[['updateApp',['$event']]]]]}}" bindtap="__e">{{''+downLoadBtnText+''}}</button></block></block><block wx:else><block wx:if="{{downloadSuccess&&!installed}}"><button class="content-button" style="border:none;color:#fff;" plain="{{true}}" loading="{{installing}}" disabled="{{installing}}" data-event-opts="{{[['tap',[['installPackage',['$event']]]]]}}" bindtap="__e">{{''+(installing?'正在安装……':'下载完成，立即安装')+''}}</button></block></block><block wx:if="{{installed&&isWGT}}"><button class="content-button" style="border:none;color:#fff;" plain="{{true}}" data-event-opts="{{[['tap',[['restart',['$event']]]]]}}" bindtap="__e">安装完毕，点击重启</button></block></block></view></view><block wx:if="{{!is_mandatory}}"><image class="close-img" src="../images/app_update_close.png" data-event-opts="{{[['tap',[['closeUpdate',['$event']]]]]}}" catchtap="__e"></image></block></view></view>

front/uni_modules/uni-upgrade-center-app/pages/upgrade-popup.wxss

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+page{background:transparent}.flex-center{display:flex;justify-content:center;align-items:center}.mask{position:fixed;left:0;top:0;right:0;bottom:0;background-color:rgba(0,0,0,.65)}.botton-radius{border-bottom-left-radius:30rpx;border-bottom-right-radius:30rpx}.content{position:relative;top:0;width:600rpx;background-color:#fff;box-sizing:border-box;padding:0 50rpx;font-family:Source Han Sans CN}.text{display:block;line-height:200px;text-align:center;color:#fff}.content-top{position:absolute;top:-195rpx;left:0;width:600rpx;height:270rpx}.content-top-text{font-size:45rpx;font-weight:700;color:#f8f8fa;position:absolute;top:120rpx;left:50rpx;z-index:1}.content-header{height:70rpx}.title{font-size:33rpx;font-weight:700;color:#3da7ff;line-height:38px}.footer{height:150rpx;display:flex;align-items:center;justify-content:space-around}.box-des-scroll{box-sizing:border-box;padding:0 40rpx;height:200rpx;text-align:left}.box-des{font-size:26rpx;color:#000;line-height:50rpx}.progress-box{width:100%}.progress{width:90%;height:40rpx;border-radius:35px}.close-img{width:70rpx;height:70rpx;z-index:1000;position:absolute;bottom:-120rpx;left:calc(50% - 70rpx / 2)}.content-button{text-align:center;flex:1;font-size:30rpx;font-weight:400;color:#fff;border-radius:40rpx;margin:0 18rpx;height:80rpx;line-height:80rpx;background:linear-gradient(90deg,#1785ff,#3da7ff)}.flex-column{display:flex;flex-direction:column;align-items:center}