client-app/pages/index/preview.vue

<template>
    <web-view :src="webSrc"/>
</template>

<script setup>
import {ref, onMounted, getCurrentInstance} from "vue";
import {onLoad} from '@dcloudio/uni-app'

//初始变量
let wv;
const instance = getCurrentInstance().proxy
const webSrc = ref('');

onLoad((option) => {
    if (option.url) {
        webSrc.value = '/hybrid/html/pdf/web/viewer.html?file= ' + decodeURIComponent(option.url);
    }
})

//渲染完成
onMounted(() => {
    // #ifdef APP-PLUS
    let currentWebview = instance.$scope.$getAppWebview()
    //如果是页面初始化调用时，需要延时一下
    setTimeout(function() {
        wv = currentWebview.children()[0]
        wv.setStyle({scalable:true})
    }, 1000);
    // #endif
})
</script>

<style lang="scss">
page {
    height: auto;
}
</style>