HarmonyOS NavDestination子页面怎么调用Navigation页面的回调？

Question

如题：HarmonyOS NavDestination子页面怎么调用Navigation页面的回调？

Answer 1

请参考如下demo：

@Entry
@Component
struct page{
  callback:Callback<string>=(str:string)=>{}
  build() {
    Navigation(){
      Button()
        .onClick(()=>{
        })
    }
    .navDestination(this.map)
  }
  @Builder
  map(){
    mima1({callback:this.callback})
  }
}
@Component
struct mima1{
  callback:Callback<string>=(str:string)=>{}
  build() {
    NavDestination(){
      Button()
        .onClick(()=>{
          this.callback('123')
        })
    }
  }
}