HarmonyOS 路由页面接收回传参数方式

import { pageBTmp, Pages } from './PageB'  
  
@Entry  
@Component  
struct PageA {  
  @State message: string = 'Hello World'  
  @Provide('pageInfo') pageInfo: NavPathStack = new NavPathStack()  
  
  @Builder  
  PageMap(name: string) {  
    if (name === 'pageB') {  
      pageBTmp({ names: name, values: this.pageInfo } as Pages)  
    }  
  }  
  build() {  
    Navigation(this.pageInfo) {  
      Column() {  
        Text(this.message)  
          .width('80%')  
          .height(50)  
          .margin(10)  
  
        CustomComp()  
      }  
    }.title('NavIndex').navDestination(this.PageMap)  
  }  
}  
  
class ParamWithOp {  
  operation: number = 1  
  count: number = 10  
}  
  
// A页面中的自定义组件  
@Component  
struct CustomComp {  
  @Consume pageInfo: NavPathStack  
  @State routerParams: ParamWithOp | undefined = undefined  
  
  build() {  
    Column() {  
      Button('pushPath', { stateEffect: true, type: ButtonType.Capsule })  
        .width('80%')  
        .height(40)  
        .margin(10)  
        .onClick(() => {  
          this.pageInfo.pushPath({name: 'pageB', param: new ParamWithOp(), onPop: (popInfo: PopInfo)=>{  
            // 在自定义组件中获取到返回的参数  
            this.routerParams = popInfo.result as ParamWithOp  
          }});  
        })  
  
      Text('返回的数据: ')  
      Text(JSON.stringify(this.routerParams))  
    }  
  }  
}

export class Pages {  
  names: string = ""  
  values: NavPathStack | null = null  
}  
  
class ParamWithOp {  
  operation: number = 1  
  count: number = 10  
  constructor(count: number) {  
    this.count = count;  
  }  
}  
  
@Builder  
export function pageBTmp(info: Pages) {  
  NavDestination() {  
    Column() {  
      Button('pop', { stateEffect: true, type: ButtonType.Capsule })  
        .width('80%')  
        .height(40)  
        .margin(20)  
        .onClick(() => {  
          // 回退到上一个页面，将处理结果传入push的onPop回调中。  
          (info.values as NavPathStack).pop(new ParamWithOp(111));  
        })  
    }.width('100%').height('100%')  
  }.title('pageB')  
  .onBackPressed(() => {  
    // 回退到上一个页面，将处理结果传入push的onPop回调。  
    (info.values as NavPathStack).pop(new ParamWithOp(0));  
    return true;  
  })  
}