解决办法

<view class='pages'><view><scroll-view scroll-y="{{sysScroll}}"  scroll-top="{{scrollTop}}" class="scroll-hei-2 bg-def">...<input bindfocus="onfocus" bindblur="onblur" placeholder="请输入药品名称" v-model="value"  />...
</scroll-view></view>
</view>
<script>
export default {data() {return {sysScroll:'true',value:'',}},methods: {onfocus() {this.sysScroll=false},onblur() {this.sysScroll= true},}}
</
script>
<style scope >
.pages {//height:100vh;
}
</style>

最上层的父级元素去掉 height：100vh