ActionSheet 动作面板 没在有最顶部显示

"usingComponents": { "van-action-sheet": "@vant/weapp/action-sheet/index" }

<van-action-sheet show="{{ show }}" actions="{{ actions }}" bind:close="onClose" bind:getuserinfo="onGetUserInfo" />

只要将z-index="{{ 999 }} 马上就显示在最顶层。