HarmonyOS 修改状态栏颜色不生效

import window from '@ohos.window';  
import router from '@ohos.router';  
@Entry  
@Component  
export struct CommonTopBar {  
  @Prop title: string  
  @Prop alpha: number = 1  
  @State statusBarHeight: number = 0  
  private titleAlignment: TextAlign = TextAlign.Center  
  private backButton: boolean = true  
  private onBackClick?: () => void  
  @State barHeight: number = 0  
  aboutToAppear() {  
    // this.setSystemStatusBar()  
    this.setSystemBar()  
  }  
  async setSystemBar() {  
    // 获取当前应用窗口  
    let windowClass: window.Window = await window.getLastWindow(getContext(this))  
    // 获取状态栏高度  
    this.barHeight = windowClass.getWindowAvoidArea(window.AvoidAreaType.TYPE_SYSTEM).topRect.height  
    await windowClass.setWindowSystemBarProperties({  
      // 颜色属性为ARGB，将蒙尘设置为0%使其透明  
      // 导航栏颜色  
      navigationBarColor:  
      '#fd121de5',  
      // 状态栏颜色  
      statusBarColor: '#ff0ad9c2',  
      // 导航栏文字颜色  
      navigationBarContentColor: '#fde20606',  
      // 状态栏文字颜色  
      statusBarContentColor: '#fff1e50a',  
    })  
  }  
  build() {  
    Column() {  
      Blank()  
        .backgroundColor(Color.Red)  
        .opacity(this.alpha)  
      Stack({ alignContent: Alignment.Start }) {  
        Stack()  
          .height(50)  
          .width("100%")  
          .opacity(this.alpha)  
          .backgroundColor(Color.Red)  
        Flex({ direction: FlexDirection.Row, alignItems: ItemAlign.Center }) {  
          Text(this.title)  
            .flexGrow(1)  
            .textAlign(this.titleAlignment)  
            .fontColor('#ffffff')  
            .fontSize(16)  
            .align(Alignment.Center)  
            .maxLines(1)  
            .textOverflow({ overflow: TextOverflow.Ellipsis })  
        }  
        .height(50)  
        .margin({ left: 50, right: 50 })  
        .alignSelf(ItemAlign.Center)  
  
        if (this.backButton) {  
          Stack() {  
            Image($r('app.media.icon'))  
              .height(16)  
              .width(16)  
              .align(Alignment.Center)  
              .onClick(() => {  
                this.onBackClick?.()  
                router.back();  
              })  
          }  
          .height(50)  
          .width(50)  
        }  
      }  
      .height(50)  
      .width("100%")  
    }.height(this.statusBarHeight)  
  }  
}
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