HarmonyOS 一个class传递属性崩溃

@Link can decorate only member variables of custom components。使用方式参考如下：

@Component
struct Child {
  @Link name: string | undefined
  build() {
    Column() {
      Button('Child change name to Bob')
        .onClick(() => {
          this.name = "xxxx"
        })
      Button('Child change animal to undefined')
        .onClick(() => {
          this.name = undefined
        })
    }.width('100%')
  }
}
@Entry
@Component
struct Index {
  @State name: string | undefined = "xxxx"
  build() {
    Column() {
      Text(`The name is  ${this.name}`).fontSize(30)
      Child({ name: this.name })
      Button('Parents change name to xxx')
        .onClick(() => {
          this.name = "xxx"
        })
      Button('Parents change name to undefined')
        .onClick(() => {
          this.name = undefined
        })
    }
  }
}