HarmonyOS NEXT应用元服务开发按钮标注场景

.const RESOURCE_STR_PLAY = $r('app.media.play')
.const RESOURCE_STR_PAUSE = $r('app.media.pause')
.
.@Component
.export struct Rule_2_1_6 {
.  title: string = 'Rule 2.1.6'
.  @State isPlaying: boolean = false
.
.  play() {
.    // play audio file
.  }
.
.  pause() {
.    // pause playing of audio file
.  }
.
.  build() {
.    NavDestination() {
.      Column() {
.        Flex({
.          direction: FlexDirection.Column,
.          alignItems: ItemAlign.Center,
.          justifyContent: FlexAlign.Center,
.        }) {
.          Row() {
.            Image(this.isPlaying ? RESOURCE_STR_PAUSE : RESOURCE_STR_PLAY)
.              .width(50)
.              .height(50)
.              .onClick(() => {
.                this.isPlaying = !this.isPlaying
.                if (this.isPlaying) {
.                  this.play()
.                } else {
.                  this.pause()
.                }
.              })
.              .accessibilityText(this.isPlaying ? 'Pause' : 'Play') // 设置注释信息
.            Text('Good_morning.mp3')
.              .margin({
.                left: 10
.              })
.          }
.        }
.        .width('100%')
.        .height('100%')
.        .backgroundColor(Color.White)
.      }
.    }
.    .title(this.title)
.  }
.}

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