HarmonyOS 底部导航绘制问题

const COMMUNITY_TAB_BAR_INDEX: number = 2; // 初始化社区的tab下标  
const ARC_MARGIN_TOP: number = -30; // 圆弧的上外间距为-30  
export class TabBarDataType {  
  id: number;  
  defaultIcon: ResourceStr;  
  constructor(id: number, defaultIcon: ResourceStr) {  
    this.id = id;  
    this.defaultIcon = defaultIcon;  
  }  
}  
export const TABINFO: TabBarDataType[] = [  
  new TabBarDataType(0, $r('app.media.app_icon')),  
  new TabBarDataType(1, $r('app.media.app_icon')),  
  new TabBarDataType(2, $r('app.media.app_icon')),  
  new TabBarDataType(3, $r('app.media.app_icon')),  
  new TabBarDataType(4, $r('app.media.app_icon')),  
];  
@Entry  
@Component  
struct TabViewDemo {  
  @Provide selectedIndex: number = 0; // 初始化被选定的tabBar下标  
  private controller: TabsController = new TabsController(); // 初始化Tab控制器  
  build() {  
    Column() {  
      Tabs({ index: this.selectedIndex, barPosition: BarPosition.End, controller: this.controller }) {  
        TabContent() {  
          Text("tab1")  
            .fontSize(26)  
        }  
        TabContent() {  
          Text("tab2")  
            .fontSize(26)  
        }  
        TabContent() {  
          Text("tab3")  
            .fontSize(26)  
        }  
        TabContent() {  
          Text("tab4")  
            .fontSize(26)  
        }  
        TabContent() {  
          Text("tab5")  
            .fontSize(26)  
        }  
      }  
      .vertical(false)  
      .scrollable(false)  
      .layoutWeight(1)  
      .backgroundColor('#ffdbd9d9')  
      .barHeight(0)  
      .onChange((index: number) => {  
        this.selectedIndex = index;  
      })  
      // 自定义TabBar组件  
      CustomTabBar({ selectedIndex: $selectedIndex })  
    }.width("100%")  
    .height("100%")  
  }  
}  
@Component  
struct CustomTabBar {  
  @Link selectedIndex: number; // 初始化被选定的tabBar下标  
  build() {  
    Flex({ direction: FlexDirection.Row, justifyContent: FlexAlign.SpaceAround, alignItems: ItemAlign.Center }) {  
      ForEach(TABINFO, (item: TabBarDataType, tabIndex: number) => {  
        // 单独一个TabBar组件  
        TabItem({  
          tabBarIndex: tabIndex,  
          selectedIndex: $selectedIndex,  
        })  
      })  
    }  
    .height(60)  
  }  
}  
Image(TABINFO[this.tabBarIndex].defaultIcon)  
  .size({ width: 43, height: 43 })  
  .interpolation(ImageInterpolation.High)  
  .borderRadius(22)  
  .width(52)  
  .height(52)  
  .borderRadius(24)  
  .margin({ top: ARC_MARGIN_TOP })  
  .backgroundColor(Color.White)  
  .justifyContent(FlexAlign.Center)  
else  
{  
  Column() {  
    // 通过被选中的tabBar下标值和tabBar的默认下标值来改变图片显示  
    Image(TABINFO[this.tabBarIndex].defaultIcon)  
      .interpolation(ImageInterpolation.High)  
      .size(  
        { width: 28, height: 28 })  
      .borderRadius(14)  
  }  
  .width(37)  
  .height(37)  
  .justifyContent(FlexAlign.Center)  
  .width(60)  
  .onClick(() => {  
    // 更新被选中的tabBar下标  
    this.selectedIndex = this.tabBarIndex;  
  })  
}
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