# Navigation | 导航

## Instructions

This example demonstrates how to handle navigation and routing with uView Pro in UniAppX.

### Key Concepts

- Page navigation with uView Pro components
- URL parameters passing
- Navigation lifecycle
- Custom navigation bar with uView Pro
- Tab bar navigation

### 使用 UniAppX 导航 API

#### 页面跳转

```typescript
// 保留当前页面，跳转到应用内的某个页面
uni.navigateTo({
  url: '/pages/detail/detail?id=1'
})

// 关闭当前页面，跳转到应用内的某个页面
uni.redirectTo({
  url: '/pages/login/login'
})

// 跳转到 tabBar 页面
uni.switchTab({
  url: '/pages/index/index'
})

// 返回上一页面
uni.navigateBack({
  delta: 1
})
```

#### 使用 uView Pro 按钮进行跳转

```vue
<template>
  <view>
    <u-button 
      type="primary" 
      @click="goToDetail"
    >
      跳转到详情页
    </u-button>
  </view>
</template>

<script setup lang="ts">
const goToDetail = () => {
  uni.navigateTo({
    url: '/pages/detail/detail?id=1'
  })
}
</script>
```

### 使用 uView Pro 导航栏

#### 自定义导航栏

```json
{
  "pages": [
    {
      "path": "pages/index/index",
      "style": {
        "navigationStyle": "custom"
      }
    }
  ]
}
```

页面中使用 uView Pro 导航栏：

```vue
<template>
  <view>
    <u-navbar 
      title="首页" 
      :border="true"
      :back-icon-color="'#ffffff'"
      :background="{
        background: 'linear-gradient(45deg, #409EFF, #67C23A)'
      }"
    >
      <template #right>
        <u-icon name="more-dot-fill" color="#ffffff" @click="handleRight"></u-icon>
      </template>
    </u-navbar>
    
    <!-- 页面内容 -->
  </view>
</template>

<script setup lang="ts">
const handleRight = () => {
  // 右侧按钮点击事件
}
</script>
```

### 使用 uView Pro 返回顶部

```vue
<template>
  <view class="container">
    <!-- 长列表内容 -->
    <u-back-top :scroll-top="scrollTop"></u-back-top>
  </view>
</template>

<script setup lang="ts">
import { ref } from 'vue'

const scrollTop = ref(0)

const onPageScroll = (e: PageScrollOption) => {
  scrollTop.value = e.scrollTop
}
</script>
```

### TabBar 导航

#### 使用原生 TabBar

```json
{
  "tabBar": {
    "color": "#7A7E83",
    "selectedColor": "#409EFF",
    "borderStyle": "black",
    "backgroundColor": "#ffffff",
    "list": [
      {
        "pagePath": "pages/index/index",
        "text": "首页"
      },
      {
        "pagePath": "pages/user/user",
        "text": "我的"
      }
    ]
  }
}
```

#### 使用 uView Pro TabBar 组件

```vue
<template>
  <view>
    <u-tabbar 
      :list="tabbarList" 
      :mid-button="true"
      @change="tabbarChange"
    ></u-tabbar>
  </view>
</template>

<script setup lang="ts">
import { ref } from 'vue'

const tabbarList = ref([
  {
    iconPath: "static/tab-home.png",
    selectedIconPath: "static/tab-home-current.png",
    text: "首页",
    pagePath: "/pages/index/index"
  },
  {
    iconPath: "static/tab-user.png",
    selectedIconPath: "static/tab-user-current.png",
    text: "我的",
    pagePath: "/pages/user/user"
  }
])

const tabbarChange = (index: number) => {
  const pagePath = tabbarList.value[index].pagePath
  uni.switchTab({
    url: pagePath
  })
}
</script>
```

### 页面传参

#### 传递参数

```typescript
// 跳转并传递参数
uni.navigateTo({
  url: '/pages/detail/detail?id=1&name=test'
})
```

#### 接收参数

```vue
<template>
  <view>
    <text>ID: {{ id }}</text>
    <text>Name: {{ name }}</text>
  </view>
</template>

<script setup lang="ts">
import { ref } from 'vue'
import { onLoad } from '@dcloudio/uni-app'

const id = ref('')
const name = ref('')

onLoad((options) => {
  id.value = options.id as string
  name.value = options.name as string
})
</script>
```

### 使用 uView Pro 搜索框导航

```vue
<template>
  <view>
    <u-search 
      placeholder="搜索内容" 
      v-model="keyword"
      @search="handleSearch"
      @custom="handleCustom"
    ></u-search>
  </view>
</template>

<script setup lang="ts">
import { ref } from 'vue'

const keyword = ref('')

const handleSearch = () => {
  uni.navigateTo({
    url: `/pages/search/search?keyword=${keyword.value}`
  })
}

const handleCustom = () => {
  // 自定义操作
}
</script>
```

### 导航栏返回按钮自定义

```vue
<template>
  <view>
    <u-navbar 
      title="详情页"
      :back-icon-name="'arrow-left'"
      @leftClick="handleBack"
    ></u-navbar>
  </view>
</template>

<script setup lang="ts">
const handleBack = () => {
  // 自定义返回逻辑
  uni.navigateBack({
    delta: 1
  })
}
</script>
```

## 注意事项

1. **路径格式**：路径必须以 `/` 开头
2. **TabBar 跳转**：使用 `uni.switchTab` 跳转到 tabBar 页面
3. **参数传递**：URL 参数需要编码
4. **页面栈**：注意页面栈限制（最多 10 层）
5. **返回按钮**：自定义导航栏需要自己处理返回逻辑
6. **TypeScript**：使用 TypeScript 类型定义，确保类型安全