HarmonyOS鸿蒙Next中使用@ObservedV2和@Trace装饰数组，数组中的对象的属性发生变化时，监听不到数组变化

@Monitor监听数组整体时，只能观测到数组整体的赋值。可以通过监听数组的长度变化来判断数组是否有插入、删除等变化

demo示例参考

let nextId: number = 0;
[@ObservedV2](/user/ObservedV2)
class Personon {
  [@Trace](/user/Trace) age: number = 0;
  constructor(age: number) {
    this.age = age;
  }
}
[@ObservedV2](/user/ObservedV2)
class Info {
  id: number = 0;
  [@Trace](/user/Trace) PersononList: Personon[] = [];
  // 能够监听到infoArr的长度变化
  [@Monitor](/user/Monitor)("PersononList.length")
  onPersononListChange(monitor: IMonitor) {
    console.info(`PersononList change from ${monitor.value()?.before} to ${monitor.value()?.now}`);
  }
  // 能够监听到整体赋值的变化
  [@Monitor](/user/Monitor)("PersononList")
  onInfoArrChange(monitor: IMonitor) {
    console.log(`PersononList change`);
  }
}
@Entry
@ComponentV2
struct Page241012094106027 {
  info: Info = new Info();
  aboutToAppear(): void {
    for (let index = 0; index < 3; index++) {
      this.info.PersononList.push(new Personon(index + 1))
    }
  }
  build() {
    Column() {
      Button("change PersononList")
        .onClick(() => {
          this.info.PersononList = [new Personon(0)];
        })
      Button("change length")
        .onClick(() => {
          this.info.PersononList.push(new Personon(123))
        })
      Divider()
      if (this.info.PersononList.length >= 3) {
        Text(`${this.info.PersononList[0].age}`)
          .fontSize(40)
          .onClick(() => {
            this.info.PersononList[0].age++;
          })
      }
      Divider()
      ForEach(this.info.PersononList, (item: Personon, index: number) => {
        Text(`${index} ${item.age}`)
          .fontSize(40)
      })
      Divider()
      Index3()
    }
  }
}
@ComponentV2
struct Index3 {
  data: Data = new Data();
  build() {
    Column() {
      Button("change name")
        .onClick(() => {
          this.data.name = "Jack"; // 能够触发onNameChange方法
        })
      Text(`name:${this.data.name}`)
      TextInput({ text: $$this.data.text })
      Text(this.data.text)
    }
  }
}
[@ObservedV2](/user/ObservedV2)
class Data {
  [@Trace](/user/Trace) name: string = "Tom";
  [@Trace](/user/Trace) text: string = '0'
  // name被[@Trace](/user/Trace)装饰，能够监听变化
  [@Monitor](/user/Monitor)("name")
  onNameChange(monitor: IMonitor) {
    console.info(`name change from ${monitor.value()?.before} to ${monitor.value()?.now}`);
  }
  [@Monitor](/user/Monitor)("text")
  onTextChange(monitor: IMonitor) {
    console.info(`Text change from ${monitor.value()?.before} to ${monitor.value()?.now}`);
  }
}

建议提供下可运行demo,方便这面调试用例， 数组那面添加数据 是否有new 关键字， push(new (object))

下面做了下测试正常，可参考：

[@ObservedV2](/user/ObservedV2)
class Personon {
  [@Trace](/user/Trace) age: number = 0;
  constructor(age: number) {
    this.age = age;
  }
}
[@ObservedV2](/user/ObservedV2)
class Info {
  id: number = 0;
  [@Trace](/user/Trace) PersononList: Personon[] = [];
  // 能够监听到infoArr的长度变化
  [@Monitor](/user/Monitor)("PersononList.length")
  onPersononListChange(monitor: IMonitor) {
    console.info(`PersononList change from ${monitor.value()?.before} to ${monitor.value()?.now}`);
  }
  // 能够监听到整体赋值的变化
  [@Monitor](/user/Monitor)("PersononList")
  onInfoArrChange(monitor: IMonitor) {
    console.log(`PersononList change`);
  }
}
@Entry
@ComponentV2
struct Page241012094106027 {
  info: Info = new Info();
  aboutToAppear(): void {
    for (let index = 0; index < 3; index++) {
      this.info.PersononList.push(new Personon(index + 1))
    }
  }
  build() {
    Column() {
      Button("change PersononList")
        .onClick(() => {
          this.info.PersononList = [new Personon(0)];
        })
      Button("change length")
        .onClick(() => {
          this.info.PersononList.push(new Personon(123))
        })
      Divider()
      if (this.info.PersononList.length >= 3) {
        Text(`${this.info.PersononList[0].age}`)
          .fontSize(40)
          .onClick(() => {
            this.info.PersononList[0].age++;
          })
      }
      Divider()
      ForEach(this.info.PersononList, (item: Personon, index: number) => {
        Child({item:item})
      })
    }
  }
}
@ComponentV2
struct Child {
  @Param @Require item: Personon;
  build() {
    Row() {
      Text(`${this.item.age}`)
        .fontSize(40)
    }
  }
}

查下下面。可能哪个细节没有留意到，若自查还无法处理，请提供demo（不复杂，很快可以封装个demo，在我们提供的demo示例直接复制代码修改成自己的页面结构即可）

1.被@Trace装饰器装饰的属性property变化时，仅会通知property关联的组件进行刷新。

2.在嵌套类中，嵌套类中的属性property被@Trace装饰且嵌套类被@ObservedV2装饰时，才具有触发UI刷新的能力。

3.在继承类中，父类或子类中的属性property被@Trace装饰且该property所在类被@ObservedV2装饰时，才具有触发UI刷新的能力。

4.在@ObservedV2装饰的类中，只有被@Trace装饰的属性才可以用在UI中，未被@Trace装饰的属性不可以用在UI中。