HarmonyOS this指向的问题

可以使用箭头函数处理this的作用域问题，参考代码如下：

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

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

  recordEvaluation() {

    promptAction.showToast({ message: `Hello World` })
  }

  build() {
    Column() {
      Child({
        recordEvaluation: () => {
          this.recordEvaluation()
        }
      })
    }.width('100%').height('100%').justifyContent(FlexAlign.Center)
  }
}


@Component
struct Child {
  recordEvaluation: () => void = () => {
  }

  build() {
    Column() {
      Button('点击').onClick(() => {
        this.recordEvaluation()
      })
    }.width('100%').height('50%').justifyContent(FlexAlign.Center)
  }
}