HTML5+ - 文章 - DCloud问答

如何解决Navigation路由调用pop后onPop回调代码不执行的问题

问题现象
使用Navigation构建路由，从pageOne通过pushPath跳转到pageTwo，期望pageOne的onPop回调在pageTwo返回时被触发，但效果未达预期。

问题代码示例参考如下：

class ParamWithOp {
operation: number = 1
count: number = 10
}

@Entry
@Component
struct PageOne {
pageInfo: NavPathStack = new NavPathStack();
@State message: string = 'Hello World'

@Builder
pageMap(name: string, params: Object) {
if (name === 'pageTwo') {
PageTwo()
}
}

build() {
Navigation(this.pageInfo) {
Column() {
Text(this.message)
.width('80%')
.height(50)
.margin(10)

    Button('pushPath', { stateEffect: true, type: ButtonType.Capsule })  
      .width('80%')  
      .height(40)  
      .margin(10)  
      .onClick(() => {  
        // 将name指定的NavDestination页面信息入栈，传递的数据为param，添加接收处理结果的onPop回调。  
        this.pageInfo.pushPath({  
          name: 'pageTwo', param: new ParamWithOp(), onPop: (popInfo: PopInfo) => {  
            this.message = `[pushPath]last page is: ${popInfo.info.name} result: ${JSON.stringify(popInfo.result)}`  
          }  
        });  
      })  
  }.width('100%').height('100%')  
}.navDestination(this.pageMap)  
.title('pageOne')

}
}

@Component
struct PageTwo {
pathStack: NavPathStack = new NavPathStack()

build() {
NavDestination() {
Column() {
Button('pop', { stateEffect: true, type: ButtonType.Capsule })
.width('80%')
.height(40)
.margin(20)
.onClick(() => {
// 回退到上一个页面，此处代码，在pop回pageOne页面时，未传参数
this.pathStack.pop();
})
}.width('100%').height('100%')
}.title('pageTwo')
.onReady((context: NavDestinationContext) => {
this.pathStack = context.pathStack
})
}
}
效果预览
点击放大

背景知识
Navigation组件是路由导航的根视图容器，结合导航控制器NavPathStack可实现组件导航。

pushPath：将info指定的NavDestination页面信息入栈。可设置onPop回调函数来接收参数。
pop：弹出路由栈栈顶元素，并触发onPop回调传入页面处理结果。
问题定位
点击放大

查阅官方文档关于pushPath方法的NavPathInfo入参说明，其中的onPop回调函数仅pop、popToName、popToIndex中设置result参数后触发。

分析结论
onPop回调函数需要使用pop、popToName、popToIndex方法返回时设置result参数才会触发，否则不会执行onPop回调。

修改建议
按上节所述，只需在pageTwo中调用pop方法时，传入result参数，即可在pageOne中成功收到onPop的回调。修改问题代码如下：

// 回退到上一个页面，随便传个result即可触发onPop回调
this.pathStack.pop(1);
修改后的运行效果参见效果预览，可以看到，当pageTwo调用pop返回时传入了result参数，在pageOne成功执行了onPop回调，并接收到相关参数。
https://pastebin.com/NRD7bMyP
https://pastebin.com/yDaZxFwG
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继续阅读 »

问题现象
使用Navigation构建路由，从pageOne通过pushPath跳转到pageTwo，期望pageOne的onPop回调在pageTwo返回时被触发，但效果未达预期。

问题代码示例参考如下：

class ParamWithOp {
operation: number = 1
count: number = 10
}

@Entry
@Component
struct PageOne {
pageInfo: NavPathStack = new NavPathStack();
@State message: string = 'Hello World'

@Builder
pageMap(name: string, params: Object) {
if (name === 'pageTwo') {
PageTwo()
}
}

build() {
Navigation(this.pageInfo) {
Column() {
Text(this.message)
.width('80%')
.height(50)
.margin(10)

    Button('pushPath', { stateEffect: true, type: ButtonType.Capsule })  
      .width('80%')  
      .height(40)  
      .margin(10)  
      .onClick(() => {  
        // 将name指定的NavDestination页面信息入栈，传递的数据为param，添加接收处理结果的onPop回调。  
        this.pageInfo.pushPath({  
          name: 'pageTwo', param: new ParamWithOp(), onPop: (popInfo: PopInfo) => {  
            this.message = `[pushPath]last page is: ${popInfo.info.name} result: ${JSON.stringify(popInfo.result)}`  
          }  
        });  
      })  
  }.width('100%').height('100%')  
}.navDestination(this.pageMap)  
.title('pageOne')

}
}

@Component
struct PageTwo {
pathStack: NavPathStack = new NavPathStack()

build() {
NavDestination() {
Column() {
Button('pop', { stateEffect: true, type: ButtonType.Capsule })
.width('80%')
.height(40)
.margin(20)
.onClick(() => {
// 回退到上一个页面，此处代码，在pop回pageOne页面时，未传参数
this.pathStack.pop();
})
}.width('100%').height('100%')
}.title('pageTwo')
.onReady((context: NavDestinationContext) => {
this.pathStack = context.pathStack
})
}
}
效果预览
点击放大

背景知识
Navigation组件是路由导航的根视图容器，结合导航控制器NavPathStack可实现组件导航。

pushPath：将info指定的NavDestination页面信息入栈。可设置onPop回调函数来接收参数。
pop：弹出路由栈栈顶元素，并触发onPop回调传入页面处理结果。
问题定位
点击放大

查阅官方文档关于pushPath方法的NavPathInfo入参说明，其中的onPop回调函数仅pop、popToName、popToIndex中设置result参数后触发。

分析结论
onPop回调函数需要使用pop、popToName、popToIndex方法返回时设置result参数才会触发，否则不会执行onPop回调。

修改建议
按上节所述，只需在pageTwo中调用pop方法时，传入result参数，即可在pageOne中成功收到onPop的回调。修改问题代码如下：

// 回退到上一个页面，随便传个result即可触发onPop回调
this.pathStack.pop(1);
修改后的运行效果参见效果预览，可以看到，当pageTwo调用pop返回时传入了result参数，在pageOne成功执行了onPop回调，并接收到相关参数。
https://pastebin.com/NRD7bMyP
https://pastebin.com/yDaZxFwG
https://pastebin.com/EDcLGLPS
https://pastebin.com/U3ZxgwDi
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编辑器：Vscode
跨平台框架：electron^41.0.3
前端框架：vite^8.0.1+vue^3.5.30+vue-router^5.0.4
大模型框架：deepseek-v3.2+openai
组件库：arco-design^2.57.0
状态管理：pinia^3.0.4
markdown解析：markdown-it^14.1.1
打包工具：electron-builder^26.8.1
vite桥接electron插件：vite-plugin-electron^0.29.1

项目框架目录结构

使用vite8.0+electron41构建项目，vue3 setup语法编码开发。

最新研发vue3.5+vite8+electron41搭建本地桌面版ai流式生成智能助手。
Electron41+Vite8+DeepSeek桌面版AI流式会话模板Exe

了解更多的项目详细介绍，可以看看下面这篇文章。
Electron41+Vite8.0+DeepSeek桌面端AI助手|electron+vue3流式ai系统

继续阅读 »

基于vite8.0+vue3+openai仿写deepseek网页版ai智能流式聊天模板

OpenAI vue3 vite ai

vite8-deepseek-webai：最新前端技术栈vite8.0、vue3.5、arco-design、markdown、openai调用deepseek-v3.2聊天大模型。支持light+dark主题、深度思考、代码高亮复制代码/下载、katex公式、mermaid图表等功能。

项目技术知识

开发工具：vscode
前端框架：vite8.0+vue3.5.30+vue-router5.0.3
智能大模型：deepseek-v3.2 + openai
组件库：arco-design2.57.0
状态管理：pinia3.0.4
markdown插件：markdown-it14.1.0
代码高亮插件：highlight.js11.11.1
katex公式：plugin-katex0.25.1

项目结构目录

使用最新正式版vite8.0搭建项目，集成deepseek api大模型接口，vue3 setup语法编码开发。

vite8-vue3-webai网页版ai对话项目已经发布到我的原创作品集，欢迎下载使用哈！
Vite8+DeepSeek+Vue3.5搭建Web版AI智能聊天对话助理

如果对项目具体的实现感兴趣，可以看看下面这篇文章。
Vite8+DeepSeek网页版AI助手|vue3+arco本地web版ai流式打字问答系统

继续阅读 »

基于vue3.5+tauri2.10+deepseek-v3.2+openai搭建客户端ai智能问答系统

ai markdown OpenAI vite vue3

vite7-tauri2-deepseek：基于vue3.5+vite7.2+tauri2.10+arco+markdown+hljs+openai深度接入deepseek-v3.2聊天大模型。支持暗黑+浅色主题、深度思考、代码高亮、复制代码、katex公式、mermaid图表等功能。