gaobaoUniApp/component/dialog.wxml

<view class="mask" catchtouchmove="preventTouchMove" wx:if="{{showModal}}"></view>

<view class="modalDlg" wx:if="{{showModal}}">
    <image src="/figures/logo-smile.png"/>
    <text>欢迎来到模态对话框~</text>
    <button bindtap="go">点我可以关掉对话框</button>
</view>

<button bindtap="submit">点我弹窗</button>