1.点击蒙版怎样禁止关闭预览（加什么属性）
2.点击关闭事件不起效怎么回事
<van-image-preview :class="{'image-preview-style':picShowList[currentSwiper].video}" class="image-preview"
v-if="show" v-model:show="show" :loop="false" :images="images" :startPosition="currentSwiper"
closeable closeIcon="arrow-left" closeIconPosition="top-left" @close="closeableClick" @change="onChange">
<template v-slot:index>
<div class="video_warp" @touchstart.stop="onTouchStart" @touchmove.stop="onTouchMove" @touchend.stop="onTouchEnd">
<div class="header flex-xcenter-ycenter">
<!-- <van-icon name="arrow-left" @click.stop="closeableClick()" /> -->
{{ currentSwiper+1 }} / {{picShowList.length}}
</div>
<videoPlay v-if="picShowList[currentSwiper].video" :id="'dPlayerVideoMain'+currentSwiper" :src="picShowList[currentSwiper].video" :poster="picShowList[currentSwiper].cover+'!l'" :autoPlay="true" />
</div>
</template>
</van-image-preview>
