【报Bug】$scope找不到

这里是源码（TS）

<template>  
<view class="bim_body">  
    <u-navbar :title="newsTitle" title-color="#fff" back-icon-color="#ffffff" :background="{  
            'background-color': '#010B14'}"  
     back-icon-name="arrow-left" :custom-back="onClickContract" back-icon-size="32">  
        <view class="navbar-right" slot="right">  
            <view class="dot-box right-item" @click="onClickShare">  
                <u-icon name="share-fill" size="32"></u-icon>  
            </view>  
        </view>  
    </u-navbar>  
        <web-view  v-if="bimUrl" :src="bimUrl" :webview-styles="webviewStyles"></web-view>  
    </view>  
</template>  

<script  lang="ts">  
import Vue from "vue";  
import { Component } from "vue-property-decorator";  
import { StorageHelper } from '@/utils/storage';  
import { ZNConfig } from "@/config/ZNConfig";  
@Component({  
  components: {  
  }  
})  
export default class ShowWeb extends Vue{  
    // private bimUrl:string = "https://www.jianshu.com/p/90d53c791c42";  
    private webviewStyles:any ={  
                    progress: {  
                        color: '#FF3333'  
                    }  
                }  
    private bimUrl:string = "";  
    private newsTitle:string = "";  
    private shareDesc:string = "";  
    private shareImg:string = "";  
    private show:boolean = false;  
    private actionBarHeight:number = 60;  

  onLoad(opt:any){  
    this.bimUrl = decodeURIComponent(opt.url);  
    if(opt.title){  
        this.newsTitle = opt.title.substring(0,opt.title.length>8?7:opt.title.length);  
    }   
    if(opt.desc){  
        this.shareDesc = opt.desc;  
    }  
    if(opt.imgUrl){  
        this.shareImg = opt.imgUrl;  
    }  
  }  

  private onClickContract(){  
      uni.navigateBack({});  
  }  

  onShow() {  
    // #ifdef APP-PLUS  
            setTimeout(()=> {  
                let that = this;  
                let height = 0; //定义动态的高度变量，如高度为定值，可以直接写  
                let statusBarHeight = 0;  
                uni.getSystemInfo({  
                    //成功获取的回调函数，返回值为系统信息  
                    success: (sysinfo:any) => {  
                        height = sysinfo.windowHeight  - that.actionBarHeight - sysinfo.statusBarHeight; //自行修改，自己需要的高度  
                        statusBarHeight = sysinfo.statusBarHeight;  
                    },  
                    complete: () => {}  
                });  
                // var currentWebview = this.$mp.page.$getAppWebview();  
                // var currentWebview = this.$parent.$scope.$getAppWebview()  
                let scopWeb = this.$scope; //获取当前web-view  
                console.log("====  ",scopWeb)  
                let currentWebview:any = this.$scope.$getAppWebview(); //获取当前web-view  
                    let wv = currentWebview.children()[0];  
                    wv.setStyle({ //设置web-view距离顶部的距离以及自己的高度，单位为px  
                        top:  statusBarHeight+that.actionBarHeight,  
                        height: height  
                    })  
            }, 500); //如页面初始化调用需要写延迟  
    // #endif  
  }  

  private onClickShare(){  
      uni.share({  
          provider: "weixin",  
          scene: "WXSceneSession",  
          type: 0,  
          href: this.bimUrl,  
          title:this.newsTitle?this.newsTitle:"科研设计中心app-新闻分享",  
          summary: this.shareDesc?this.shareDesc:"我正在使用[科研设计中心]app，赶紧跟我一起来体验！",  
          imageUrl: this.shareImg?this.shareImg:"https://bjetxgzv.cdn.bspapp.com/VKCEYUGU-uni-app-doc/d8590190-4f28-11eb-b680-7980c8a877b8.png",  
          success: function (res) {  
              uni.showToast({  
                  title:"分享成功",  
                  icon:"none"  
              })  
          },  
          fail: function (err) {  
              uni.showToast({  
                  title:"分享失败",  
                  icon:"none"  
              })  
          }  
      });  
  }  

}  
</script>  

<style lang="scss" scoped>  
.bim_body{  
    position: absolute;  
    width: 100%;  
    height: 100%;  

}  
 .navbar-right {  
        margin-right: 24rpx;  
        display: flex;  
    }  
    .right-item {  
        margin: 0 12rpx;  
        position: relative;  
        color: #ffffff;  
        display: flex;  
    }  

</style>