父组件给子组件传递函数

@Entry  
@Component  
struct Index {  
  text: string = 'Parent:Hello world!'  
  refreshPage = () => {  
    console.log(`Demo ${this.text}`)  
  }  
  
  build() {  
    Row() {  
      Child({ refreshPage: this.refreshPage })  
    }.height('100%')  
  }  
}  
  
@Component  
struct Child {  
  refreshPage = (): void => {  
  }  
  @State message: string = 'Hello World';  
  
  build() {  
    Column() {  
      Text(this.message)  
        .fontSize(50)  
        .fontWeight(FontWeight.Bold)  
        .onClick(() => {  
          this.refreshPage()  
        })  
    }  
    .width('100%')  
  }  
}