#夏日挑战赛# 【木棉花】：ETS自定义导航栏组件 原创 精华

  @State selectedIndex: number = 0
  @State menuData: any[]= [{
                             "text": " 首页 ",
                             "inActiveImg": $r('app.media.shouye'),
                             "activeImg": $r('app.media.taobao')
                           },
                           {
                             "text": " 逛逛 ",
                             "inActiveImg": $r('app.media.guangguang'),
                             "activeImg": $r('app.media.guangguang_on'),
                           },
                           {
                             "text": " 消息 ",
                             "inActiveImg": $r('app.media.msg'),
                             "activeImg": $r('app.media.msg_on'),
                           },
                           {
                             "text": "购物车",
                             "inActiveImg": $r('app.media.gouwuche'),
                             "activeImg": $r('app.media.gouwuche_on'),
                           },
                           {
                             "text": "我的淘宝",
                             "inActiveImg": $r('app.media.wode'),
                             "activeImg": $r('app.media.wode_on'),
                           },
  ]
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  build() {
    Flex({ direction: FlexDirection.Row, alignItems: ItemAlign.Center, justifyContent: FlexAlign.SpaceAround }) {
      ForEach(this.menuData.map((item1, index1) => {
        return { i: index1, data: item1 };
      }),
        item => { // Parameter 2: item generator
            Column({ space: 5 }) {
              Image(this.selectedIndex === item.i ? item.data.activeImg : item.data.inActiveImg
              ).width(30).height(30).objectFit(ImageFit.Cover)

              Text(item.data.text)
                .fontSize(15)
                .fontWeight(FontWeight.Bold)
                .fontColor(this.selectedIndex === item.i ? '#FC7D0C' : '#bfbfbf')

            }.height('60').onClick(() => {
              this.selectedIndex = item.i;
            })
        }, item => item.i.toString()
      )
    }
    .borderColor(Color.Gray)
    .borderWidth(0.2)
    .width('100%')
    .height('9%')
  }
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@State selectedIndex: number = 0
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  @Link selectedIndex: number
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import { MyTab } from './MyTab'

@Entry
@Component
struct Test {
  @State selectedIndex: number = 0

  build() {
    Flex({ direction: FlexDirection.Column }) {
      Flex({ direction: FlexDirection.Column }) {
        if (this.selectedIndex == 0) {
          Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
            Text('这是首页的界面').fontSize(30)
          }.height('92%').width('98%')
        } else if (this.selectedIndex == 1) {
          Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
            Text('这是逛逛的界面').fontSize(30)
          }.height('92%').width('98%')
        } else if (this.selectedIndex == 2) {
          Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
            Text('这是消息界面').fontSize(30)
          }.height('92%').width('98%')
        } else if (this.selectedIndex == 3) {
          Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
            Text('这是购物车的界面').fontSize(30)
          }.height('92%').width('98%')
        } else if (this.selectedIndex == 4) {
          Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
            Text('这是我的界面').fontSize(30)
          }.height('92%').width('98%')
        }
      }
      .width('98%')
      .height('91%')

      MyTab({ selectedIndex: $selectedIndex })
    }
    .width('100%')
    .height('100%')
  }
}
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