HarmonyOS APP升级弹框样式UI是否可以自定义showUpdateDialog？

import router from '@ohos.router';  
@Entry  
@Component struct PanelExample {  
  @State show: boolean = false  
  build() {  
    Stack() {  
      Text('2021-09-30 Today Calendar: 1.afternoon......Click for details')  
        .width('90%')  
        .height(50)  
        .borderRadius(10)  
        .backgroundColor(0xFFFFFF)  
        .padding({ left: 20 })  
        .onClick(() => {  
          this.show = !this.show  
        })  
      Panel(this.show) { // 展示日程  
         Column() {  
           Button('router')  
             .onClick(() => {  
               router.pushUrl({ url: 'pages/Page' })  
             })  
         }  
      }  
      .type(PanelType.CUSTOM)  
      .mode(PanelMode.Full)  
      .dragBar(false) // 默认开启  
      .customHeight(100)  
      .showCloseIcon(false) // 显示关闭图标  
      .backgroundMask('#08182431')  
      .position({ x: 0, y: -100 })  
      .onChange((width: number, height: number, mode: PanelMode) => {  
        console.info(`width:${width},height:${height},mode:${mode}`)  
      })  
    }  
    .width('100%')  
    .height('100%')  
    .backgroundColor(0xDCDCDC)  
    .padding({ top: 5 })  
  }  
}