HarmonyOS 鸿蒙Next：在ListItem内，如何监听到ItemModel的某个属性的值的变化，以及根据itemModel里的isShow值的变化决定是否显示ListItem内的某一个组件。我现在在ListItem的组件里给itemModel添加了@ObjectL

文档：https://gitee.com/openharmony/docs/blob/master/zh-cn/application-dev/quick-start/properly-use-state-management-to-develope.md#使用observed装饰或被声明为状态变量的类对象订阅组件

https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/arkts-observed-and-objectlink-V5#对象数组

参考这个demo

@Observed
export class ControlList extends Array<Controls> {
  constructor() {
    super();
  }
}

@Observed
export class Controls {
  uuid: string
  control_type: string
  control_weights: string
  control_name: string
  control_status: string
  control_location: string
  control_menu_levels: string
  control_position: string
  control_h_name: string
  control_value: string
  isSelect: boolean
  constructor(param: Controls) {
    this.uuid = param.uuid
    this.control_type = param.control_type
    this.control_weights = param.control_weights
    this.control_name = param.control_name
    this.control_status = param.control_status
    this.control_location = param.control_location
    this.control_menu_levels = param.control_menu_levels
    this.control_position = param.control_position
    this.control_h_name = param.control_h_name
    this.control_value = param.control_value
    this.isSelect = param.isSelect
  }
}

@Component
export struct TestPage {
  @ObjectLink dataSource: ControlList
  build() {
    Column() {
      List({ space: 10 }) {
        ForEach(this.dataSource, (item: Controls, index) => {
          ListItem() {
            ControlItem({
              item: item,
              dataSource: this.dataSource,
            })
          }
        })
      }.margin({ top: 10, bottom: 10 })
    }
  }
}

@Component
struct ControlItem {
  @ObjectLink item: Controls
  @Link dataSource: ControlList
  build() {
    Row() {
      if (this.item.isSelect) {
        Row() {
          Text(this.item.control_h_name).fontSize(15).fontColor('#B11F1A')
          Image($r('app.media.startIcon')).width(20).height(20)
        }
        .width('100%')
        .borderRadius(18)
        .borderWidth(1)
        .borderColor('#FFAE2921')
        .padding(5)
        .justifyContent(FlexAlign.SpaceBetween