HarmonyOS API：基础组件

// xxx.ets
@Entry
@Component
struct ImageAnimatorExample {
  @State state: AnimationStatus = AnimationStatus.Initial
  @State reverse: boolean = false
  @State iterations: number = 1

  build() {
    Column({ space: 10 }) {
      ImageAnimator()
        .images([
          {
            src: $r('app.media.img1'),
            width: 340,
            height: 240,
          },
          {
            src: $r('app.media.img2'),
            width: 340,
            height: 240,
          },
          {
            src: $r('app.media.img3'),
            width: 340,
            height: 240,
          },
          {
            src: $r('app.media.img4'),
            width: 340,
            height: 240,
          }
        ])
        .duration(2000)
        .state(this.state).reverse(this.reverse).fixedSize(false).preDecode(2)
        .fillMode(FillMode.None).iterations(this.iterations).width(340).height(240)
        .margin({ top: 100 })
        .onStart(() => {
          console.info('Start')
        })
        .onPause(() => {
          console.info('Pause')
        })
        .onRepeat(() => {
          console.info('Repeat')
        })
        .onCancel(() => {
          console.info('Cancel')
        })
        .onFinish(() => {
          console.info('Finish')
        })
      Row() {
        Button('start').width(100).padding(5).onClick(() => {
          this.state = AnimationStatus.Running
        }).margin(5)
        Button('pause').width(100).padding(5).onClick(() => {
          this.state = AnimationStatus.Paused     // 显示当前帧图片
        }).margin(5)
        Button('stop').width(100).padding(5).onClick(() => {
          this.state = AnimationStatus.Stopped    // 显示动画的起始帧图片
        }).margin(5)
      }

      Row() {
        Button('reverse').width(100).padding(5).onClick(() => {
          this.reverse = !this.reverse
        }).margin(5)
        Button('once').width(100).padding(5).onClick(() => {
          this.iterations = 1
        }).margin(5)
        Button('infinite').width(100).padding(5).onClick(() => {
          this.iterations = -1 // 无限循环播放
        }).margin(5)
      }
    }.width('100%').height('100%')
  }
}

// xxx.ets
@Entry
@Component
struct LoadingProgressExample {
  build() {
    Column({ space: 5 }) {
      Text('Orbital LoadingProgress ').fontSize(9).fontColor(0xCCCCCC).width('90%')
      LoadingProgress()
        .color(Color.Blue)
    }.width('100%').margin({ top: 5 })
  }
}

// xxx.ets
@Entry
@Component
struct MarqueeExample {
  @State start: boolean = false
  private fromStart: boolean = true
  private step: number = 50
  private loop: number = Infinity
  private src: string = "Running Marquee starts rolling"

  build() {
    Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
      Marquee({
        start: this.start,
        step: this.step,
        loop: this.loop,
        fromStart: this.fromStart,
        src: this.src
      })
        .width(360)
        .height(80)
        .fontColor('#FFFFFF')
        .fontSize(48)
        .fontWeight(700)
        .backgroundColor('#182431')
        .margin({ bottom: 40 })
        .onStart(() => {
          console.info('Marquee animation complete onStart')
        })
        .onBounce(() => {
          console.info('Marquee animation complete onBounce')
        })
        .onFinish(() => {
          console.info('Marquee animation complete onFinish')
        })
      Button('Start')
        .onClick(() => {
          this.start = true
        })
        .width(120)
        .height(40)
        .fontSize(16)
        .fontWeight(500)
        .backgroundColor('#007DFF')
    }
    .width('100%')
    .height('100%')
  }
}

// xxx.ets
@Entry
@Component
struct NavRouterExample {
  private arr: number[] = [0, 1, 2, 3]
  @State isActive: boolean = false
  @State dex: number = 0

  build() {
    Column() {
      Navigation() {
        List({ space: 12, initialIndex: 0 }) {
          ForEach(this.arr, (item: number, index: number) => {
            ListItem() {
              NavRouter() {
                Row() {
                  Image($r('app.media.icon')).width(30).height(30).borderRadius(30).margin({ left: 3, right: 10 })
                  Text(`NavRouter${item + 1}`)
                    .fontSize(22)
                    .fontWeight(500)
                    .textAlign(TextAlign.Center)
                }
                .width(180)
                .height(72)
                .backgroundColor(this.dex === index ? '#ccc' : '#fff')
                .borderRadius(24)

                NavDestination() {
                  Text(`我是NavDestination第${item + 1}页内容`).fontSize(50)
                  Flex({ direction: FlexDirection.Row }) {
                    Row() {
                      Image($r('app.media.icon')).width(40).height(40).borderRadius(40).margin({ right: 15 })
                      Text('今天共有七节课').fontSize(30)
                    }.padding({ left: 15 })
                  }
                }.backgroundColor('#ccc')
                .title(`NavDestination${item + 1}`)
              }.onStateChange((isActivated: boolean) => {
                this.dex = index
              })
            }
          }, item => item)
        }
        .height('100%')
        .margin({ top: 12, left: 12 })
      }
      .mode(NavigationMode.Split)
      .hideTitleBar(true)
      .hideToolBar(true)
    }.height('100%')
  }
}