HarmonyOS ArkTS反射

ArkTS支持反射。可以参考相应的官网文档来了解相关内容，链接如下：

https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/arkts-dynamic-import-V5#业务扩展场景介绍

参考demo：

import { promptAction } from '@kit.ArkUI';

@Entry
@Component
struct Index {
  @State message: string = 'Hello World';

  setReflection() {
    let myClass = new Person()
    Reflect.set(myClass, 'name', '反射测试')
    promptAction.showToast({ message: `当前的信息为：${JSON.stringify(myClass)}` })
    let s = JSON.stringify(myClass)
    let obj = JSON.parse(s) as object
    console.log(`reflect.get: ${Reflect.get(obj, 'name')}`)
    console.log(`reflect.has: ${Reflect.has(obj, 'name')}`)
    console.log(`reflect.has: ${Reflect.has(obj, 'idCard')}`)
    console.log(`reflect.ownKeys: ${Reflect.ownKeys(obj)}`)
  }

  build() {
    Column() {
      Button('点击一下').onClick(() => {
        this.setReflection()
      })
    }.justifyContent(FlexAlign.Center).height('100%').width('100%')
  }
}

class Person {
  name: string = 'John'
  age: number = 18
  gender: string = 'male'

  constructor() {
  }
}