HarmonyOS webview输入框被遮挡

软键盘的话可以监听软键盘弹出和收起，开启固定态输入法窗口软键盘高度变化的监听，获取当前的键盘高度，来规避内容被盖住的问题。

也可以用expandSafeArea属性把组件扩展其安全区域：

可以参考案例中的监听软键盘弹出和收起：

import webview from '@ohos.web.webview';
import window from '@ohos.window';

@Entry
@Component
export struct SubWindowPage {
  @State webViewVisibility: Visibility = Visibility.Visible;
  private pageWidth = 320;
  private pageHeight = 500;
  private controller: webview.WebviewController = new webview.WebviewController();
  @State flexAlign: FlexAlign = FlexAlign.Center
  @State screenHeight: number | string = '100%'
  aboutToAppear() {
    window.getLastWindow(getContext(this)).then(currentWindow => {
      // 监视软键盘的弹出和收起
      currentWindow.on('avoidAreaChange', async data => {
        let property = currentWindow.getWindowProperties();
        let avoidArea = currentWindow.getWindowAvoidArea(window.AvoidAreaType.TYPE_KEYBOARD);
        this.screenHeight = px2vp(property.windowRect.height - avoidArea.bottomRect.height);
      });
    })
  }
  build() {
    Stack() {
      Column() {
        Web({ src: $rawfile('index.html'), controller: this.controller })
          .javaScriptAccess(true)
          .fileAccess(false)
          .zoomAccess(false)
          .domStorageAccess(true)
          .onlineImageAccess(true)
          .horizontalScrollBarAccess(false)
          .verticalScrollBarAccess(false)
          .cacheMode(CacheMode.Online)
          .width(this.pageWidth)
          .height(this.pageHeight)
          .border({ radius: 6 })
          .visibility(this.webViewVisibility)
          .backgroundColor(Color.Pink)
      }
      .justifyContent(this.flexAlign)
      .alignItems(HorizontalAlign.Center)
      .width('100%')
      .height('100%')
    }
    .width('100%')
    .height(this.screenHeight)
    .backgroundColor('#999955')
    .alignContent(Alignment.Center)
  }
}
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