HarmonyOS 自定义键盘弹起后遮住输入框

import window from '@ohos.window';  
@Entry  
@Component  
struct Index {  
 @State screenHeight: number = 0;  
 aboutToAppear() {  
window.getLastWindow(getContext(this)).then(currentWindow =>{  
     let property = currentWindow.getWindowProperties();  
     let avoidArea = currentWindow.getWindowAvoidArea(window.AvoidAreaType.TYPE_KEYBOARD);  
     // 初始化显示区域高度  
     this.screenHeight = px2vp(property.windowRect.height - avoidArea.bottomRect.height);  
     // 监视软键盘的弹出和收起  
     currentWindow.on('avoidAreaChange', async data => {  
       if (data.type !== window.AvoidAreaType.TYPE_KEYBOARD) {  
         return;  
       }  
       this.screenHeight = px2vp(property.windowRect.height - data.area.bottomRect.height);  
     })  
   })  
 }  
 build() {  
   Row() {  
     Column() {  
       Text('请输入短信验证码')  
         .fontSize(30)  
         .margin({  
           bottom:'50'  
         })  
       TextInput()  
         .width('70%')  
         .height('150px')  
         .margin({  
           bottom: '30'  
         })  
       Button('确定')  
         .width('70%')  
         .margin('20px')  
     }  
     .width('100%')  
   }  
   .width('100%').height(this.screenHeight)  
 }  
}