HarmonyOS 是否有新闻频道管理的案例

参考示例：

import curves from '@ohos.curves';

// import { ArrayList, List as A } from '@kit.ArkTS';
@Entry
@Component
struct TPage {
  @State numbers0: String[] = []
  @State numbers: String[] =
    ["娱乐", "关注", "热榜", "航天", "动漫", "宠物", "保险", "小说", "汽车", "财经", "体育", "女性", "搞笑", "军事",
      "有料", "北京", "深度", "电影"]
  scroller: Scroller = new Scroller()
  @State text: string = 'drag'
  @State isShowDelete: boolean = false
  @State isEdit: boolean = false
  @State rotateZ: number = 0;
  
  private stopJump() {
    animateTo({
      delay: 0,
      tempo: 5,
      duration: 0,
      curve: Curve.Smooth,
      playMode: PlayMode.Normal,
      iterations: 1

    },
      () => {
        this.rotateZ = 0;
      })
  }

  //抖动的动画
  private jumpWithSpeed(speed: number) {
    if (this.isEdit) {
      this.rotateZ = -1;
      animateTo({
        delay: 0, //延时播放
        tempo: speed, //动画的播放速度，值越大动画播放越快
        duration: 1000, //动画持续的时间
        curve: Curve.Smooth, //动画曲线
        playMode: PlayMode.Normal, //动画播放模式
        iterations: -1

      },
        () => {
          this.rotateZ = 1;

        })
    } else {
      this.stopJump()
    }
  }

  //拖拽过程中展示的样式
  @Builder
  pixelMapBuilder() {
    Column() {
      Text(this.text)
        .fontSize(16)
        .backgroundColor(0xF9CF93)
        .width(80)
        .height(40)
        .textAlign(TextAlign.Center)
        .borderRadius(20)
        .borderWidth(2)
        .borderColor(Color.Orange)
    }
  }

  //改变数组中元素位置
  changeIndex(index1: number, index2: number) {
    this.numbers0.splice(index2, 0, this.numbers0.splice(index1, 1)[0])

  }

  build() {
    Flex({ direction: FlexDirection.Column, justifyContent: FlexAlign.SpaceAround }) {

      Column() {
        Row({ space: 30 }) {
          Text("我的频道")
            .fontSize(20)
          Text(this.isEdit ? "长按拖动调整顺序" : "点击编辑按钮进入编辑")
            .fontColor(Color.Gray)
          Button() {
            Text(this.isEdit ? "完成" : "编辑")
              .fontColor(this.isEdit ? Color.Black : 0xF9CF93)
          }.width(80)
          .height(30)
          .backgroundColor(Color.White)
          .onClick(() => {
            this.isEdit = !this.isEdit
            this.jumpWithSpeed(5)
          })
        }.padding({ left: 15 })


        Grid(this.scroller) {
          ForEach(this.numbers0, (day: string, index: number) => {
            GridItem() {
              Stack({ alignContent: Alignment.TopEnd }) {
                Text(day)
                  .borderRadius(20)
                  .borderWidth(2)
                  .borderColor(Color.Orange)
                  .fontSize(16)
                  .backgroundColor(0xF9CF93)
                  .width(80)
                  .height(40)
                  .textAlign(TextAlign.Center)
                  .onTouch((event: TouchEvent) => {
                    if (event.type === TouchType.Down) {
                      this.text = day
                    }
                  })
                if (this.isEdit) {
                  Image($r('app.media.close'))
                    .width(20)
                    .height(20)
                    .onClick(() => {
                      animateTo({ duration: 300 }, () => {
                        //移除上部分频道，将移除上部加入下部分频道
                        this.numbers.splice(this.numbers.length, 0, this.numbers0[index])
                        this.numbers0.splice(index, 1)
                      })
                      this.stopJump()

                      this.jumpWithSpeed(5)
                    })
                }
              }
              .rotate({
                z: this.rotateZ,
                angle: 0.4,
                centerX: 0.5,
                centerY: 0.5
              })
            }
            .transition({ type: TransitionType.All, translate: { x: 100 }, scale: { x: 1, y: 1 } })
            .padding({ top: 15 })

          })
        }
        .columnsTemplate('1fr 1fr 1fr')
        .columnsGap(10)
        .rowsGap(10)
        .onScrollIndex((first: number) => {
          console.info(first.toString())
        })
        .margin({ top: 5 })
        .width('100%')
        .backgroundColor(0xFAEEE0)
        .height('100%')
        .supportAnimation(true) //是否支持动画
        //设置Grid是否进入编辑模式，进入编辑模式可以拖拽Grid组件内部GridItem
        .editMode(this.isEdit)
        //第一次拖拽此事件绑定的组件时，触发回调
        .onItemDragStart((event: ItemDragInfo, itemIndex: number) => {
          //设置拖拽过程中显示的图片
          return this.pixelMapBuilder()
        })
        //绑定此事件的组件可作为拖拽释放目标，当在本组件范围内停止拖拽行为时，触发回调
        //itemIndex为拖拽起始位置，insertIndex为拖拽插入位置
        .onItemDrop((event: ItemDragInfo, itemIndex: number, insertIndex: number, isSuccess: boolean) => {
          //不支持拖拽到已有内容以外的位置
          if (insertIndex < this.numbers.length) {
            this.changeIndex(itemIndex, insertIndex)
            this.stopJump()
            this.jumpWithSpeed(5)
          }
        })
      }
      .width('100%')
      .height('40%')

      Column() {
        Row() {
          Text("所有频道")
            .fontSize(20)
        }.padding({ left: 15 })
        .width("100%")
        .justifyContent(FlexAlign.Start)

        Grid(this.scroller) {
          ForEach(this.numbers, (day: string, index: number) => {
            GridItem() {
              Stack({ alignContent: Alignment.TopEnd }) {
                Text(day)
                  .borderRadius(20)
                  .borderWidth(2)
                  .borderColor(Color.Orange)
                  .fontSize(16)
                  .backgroundColor(0xF9CF93)
                  .width(80)
                  .height(40)
                  .textAlign(TextAlign.Center)
                  .onClick(() => {
                    animateTo({ duration: 300 }, () => {
                      //移除上部分频道，将移除上部加入下部分频道
                      this.numbers0.splice(this.numbers0.length, 0, this.numbers[index])
                      this.numbers.splice(index, 1)
                    })
                    this.stopJump()

                    this.jumpWithSpeed(5)
                  })
                // }
              }
              .rotate({
                z: this.rotateZ,
                angle: 0.4,
                centerX: 0.5,
                centerY: 0.5

              })

            }
            .transition({ type: TransitionType.All, translate: { x: 100 }, scale: { x: 1, y: 1 } })
            .padding({ top: 15 })

          })
        }
        .columnsTemplate('1fr 1fr 1fr')
        .columnsGap(10)
        .rowsGap(10)
        .onScrollIndex((first: number) => {
          console.info(first.toString())
        })
        .margin({ top: 5 })
        .width('100%')
        .backgroundColor(0xFAEEE0)
        .height('100%')
      }
      .width('100%')
      .height('40%')
    }.width('100%')
    .margin({ top: 5 })
  }
}