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组件导航 (Navigation)+flutter项目搭建

接上一章flutter项目的环境变量配置并运行flutter

上一章面熟了搭建flutter并用编辑器运行了ohos项目，这章主要是对项目的工程化改造

先创建flutter项目，再配置Navigation

1.在开发视图的resources/base/profile下面定义配置文件，文件名可以自定义，例如：router_map.json。

{"routerMap": [{"name": "PageFlutter","pageSourceFile": "src/main/ets/pages/home/PageFlutter.ets","buildFunction": "PageFlutterBuilder","data": {"description": "this is PageOne"}},{"name": "PageTwo","pageSourceFile": "src/main/ets/pages/home/PageTwo.ets","buildFunction": "PageTwoBuilder","data": {"description": "this is PageTwo"}},{"name": "PageThree","pageSourceFile": "src/main/ets/pages/home/PageThree.ets","buildFunction": "PageThreeBuilder","data": {"description": "this is PageThree"}}]
}

2.在module.json5配置的module下面配置

{"module": {..."routerMap": "$profile:router_map",}
}

项目文件如下

在入口 "pages/Index"文件配置

需要注意的是flutter只会一次，把栈移到顶部，不能一直push
Index.ets

import { PageFlutterBuilder } from "./home/PageFlutter";
import { PageThreeBuilder } from "./home/PageThree";
import { PageTwoBuilder } from "./home/PageTwo";let storage = LocalStorage.getShared()@Entry(storage)
@Component
struct Index {@Provide('pageInfos') pageInfos: NavPathStack = new NavPathStack()private arr: string[] = ['PageFlutter', 'PageTwo', 'PageThree'];build() {Column() {Navigation(this.pageInfos) {List({ space: 12 }) {ForEach(this.arr, (item: string) => {ListItem() {Text("Page" + item).width("100%").height(72).backgroundColor('#FFFFFF').borderRadius(24).fontSize(16).fontWeight(500).textAlign(TextAlign.Center).onClick(() => {if(item==='PageFlutter'&&this.pageInfos.getAllPathName().includes('PageFlutter')){// flutter只会一次，把栈移到顶部this.pageInfos.moveToTop(item)}else {this.pageInfos.pushPath({ name: item});}})}}, (item: number) => item.toString())}.width("90%").margin({ top: 12 })}.mode(NavigationMode.Auto).hideTitleBar(true)}.height('100%').width('100%').backgroundColor('#F1F3F5')}
}

PageFlutter.ets

import { FlutterPage } from "@ohos/flutter_ohos";
import { common } from "@kit.AbilityKit";// 跳转页面入口函数
@Builder
export function PageFlutterBuilder() {PageFlutter();
}
const EVENT_BACK_PRESS = 'EVENT_BACK_PRESS'@Component
struct PageFlutter {pathStack: NavPathStack = new NavPathStack();@LocalStorageLink('viewId') viewId: string = "";private context = getContext(this) as common.UIAbilityContextbuild() {NavDestination() {Text('hellppp')if(this.viewId){FlutterPage({ viewId: this.viewId })}}.onReady((context: NavDestinationContext) => {this.pathStack = context.pathStack;}).onBackPressed(() => {this.context.eventHub.emit(EVENT_BACK_PRESS)return true;}).hideTitleBar(true)}
}

其他PageThree.ets，PageTwo.ets随便写

效果如下