WebView加载url无法滚动 HarmonyOS 鸿蒙Next

// xxx.ets
import web_webview from '[@ohos](/user/ohos).web.webview'

[@Entry](/user/Entry)
[@Component](/user/Component)
struct WebComponent {
  controller: web_webview.WebviewController = new web_webview.WebviewController()
  [@State](/user/State) mode: WebLayoutMode = WebLayoutMode.FIT_CONTENT

  build() {
    Column() {
      Text("这里是头部区域")
        .width("100%")
        .height('30%')
        .backgroundColor("#f89f0f")
        .fontSize(28)
        .fontColor("#FF0F0F")
      Web({ src: $rawfile('Index.html'), controller: this.controller })
        .width('100%')
        .height(200)// .layoutMode(this.mode)
        .zoomAccess(false)
        .domStorageAccess(true)
        .overviewModeAccess(true)
        .imageAccess(true)
        .onlineImageAccess(true)
        .fileAccess(true)
        .databaseAccess(true)
      Text("这里是底部区域")
        .fontSize(28)
        .fontColor("#FF0F0F")
        .width("100%")
        .height('40%')
        .backgroundColor("#f89f0f")
    }
    .width('100%')
    .height('100%')
  }
}