HarmonyOS @State修饰的class变量没有嵌套的值无法监听

@State buttonProperty: ButtonProperty = new ButtonProperty(0)  
  
  build() {  
  
      Column() {  
        Button("触发动画", { type: ButtonType.Normal })  
          .fontColor(Color.Black)  
          .fontWeight(FontWeight.Bold)  
          .border({ width: 1, color: Color.Blue })  
          .borderRadius(5)  
          .backgroundColor(Color.Yellow)  
          .margin(this._margin)  
          .width('100%')  
          .height('6%')  
          .onClick(() => {  
            this.buttonProperty.animator()  
          })  
  
        Button("被触发动画", { type: ButtonType.Normal })  
          .fontColor(Color.Black)  
          .fontWeight(FontWeight.Bold)  
          .border({ width: 1, color: Color.Blue })  
          .borderRadius(5)  
          .backgroundColor(Color.Yellow)  
          .margin(this._margin)  
          .width('100%')  
          .height('6%')  
          .translate({ x: this.buttonProperty.translateX })  
          .onClick(() => {  
            showResult("这是一个 Dialog")  
          })  
}  
}  
  
export class ButtonProperty {  
  translateX: number  
  
  constructor(translateX: number) {  
    this.translateX = translateX  
  }  
  
  animator = (): void => {  
    this.translateX = -1  
    console.error("Step01 this.translateX = " + this.translateX)  
    animateTo({ duration: 2000, curve: curves.springCurve(200, 1, 1, 1.2) }, () => {  
      console.error("以指定初速度进行x方向的平移的弹簧动画")  
      // 以指定初速度进行x方向的平移的弹簧动画  
      this.translateX = 0  
      console.error("Step02 this.translateX = " + this.translateX)  
    })  
  }  
}

// class属性的赋值  this.title.value = 'Hi';