HarmonyOS 60秒倒计时demo

@Entry 
@Component 
struct TextTimerExample { 
  textTimerController: TextTimerController = new TextTimerController() 
  @State format: string = 'mm:ss' 
 
  build() { 
    Column() { 
      TextTimer({ isCountDown: true, count: 60000, controller: this.textTimerController }) 
        .format(this.format) 
        .fontColor(Color.Black) 
        .fontSize(50) 
        .onTimer((utc: number, elapsedTime: number) => { 
          console.info('textTimer notCountDown utc is：' + utc + ', elapsedTime: ' + elapsedTime) 
        }) 
      Row() { 
        Button("start").onClick(() => { 
          this.textTimerController.start() 
        }) 
        Button("pause").onClick(() => { 
          this.textTimerController.pause() 
        }) 
        Button("reset").onClick(() => { 
          this.textTimerController.reset() 
        }) 
      } 
    } 
  } 
}