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181 lines
3.7 KiB
Markdown
181 lines
3.7 KiB
Markdown
# TreeSelect 分类选择
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### 引入
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```js
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import Vue from 'vue';
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import { TreeSelect } from 'vant';
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Vue.use(TreeSelect);
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```
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## 代码演示
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### 单选模式
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`item`为分类显示所需的数据，数据格式见下方示例。`main-active-index`表示左侧高亮选项的索引，`active-id`表示右侧高亮选项的 id
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```html
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<van-tree-select
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v-model:active-id="activeId"
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v-model:main-active-index="activeIndex"
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:items="items"
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/>
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```
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```js
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export default {
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data() {
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return {
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items,
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activeId: 1,
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activeIndex: 0,
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};
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},
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};
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```
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### 多选模式
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`active-id`为数组格式时，可以选中多个右侧选项
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```html
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<van-tree-select
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v-model:active-id="activeIds"
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v-model:main-active-index="activeIndex"
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:items="items"
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/>
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```
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```js
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export default {
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data() {
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return {
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items,
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activeIds: [1, 2],
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activeIndex: 0,
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};
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},
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};
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```
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### 自定义内容
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通过`content`插槽可以自定义右侧区域的内容
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```html
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<van-tree-select
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v-model:main-active-index="active"
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height="55vw"
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:items="items"
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>
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<template #content>
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<van-image
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v-if="active === 0"
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src="https://img.yzcdn.cn/vant/apple-1.jpg"
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/>
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<van-image
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v-if="active === 1"
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src="https://img.yzcdn.cn/vant/apple-2.jpg"
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/>
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</template>
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</van-tree-select>
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```
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```js
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export default {
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data() {
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return {
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active: 0,
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items: [{ text: '分组 1' }, { text: '分组 2' }],
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};
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},
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};
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```
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### 徽标提示
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设置`dot`属性后，会在图标右上角展示一个小红点。设置`badge`属性后，会在图标右上角展示相应的徽标
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```html
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<van-tree-select
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v-model:main-active-index="activeIndex"
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height="55vw"
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:items="items"
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/>
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```
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```js
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export default {
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data() {
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return {
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activeIndex: 0,
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items: [
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{ text: '浙江', children: [], dot: true },
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{ text: '江苏', children: [], badge: 5 },
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],
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};
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},
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};
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```
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## API
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### Props
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| 参数 | 说明 | 类型 | 默认值 |
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| --- | --- | --- | --- |
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| items | 分类显示所需的数据 | _Item[]_ | `[]` |
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| height | 高度，默认单位为`px` | _number \| string_ | `300` |
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| main-active-index | 左侧选中项的索引 | _number \| string_ | `0` |
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| active-id | 右侧选中项的 id，支持传入数组 | _number \| string \|<br>(number \| string)[]_ | `0` |
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| max `v2.2.0` | 右侧项最大选中个数 | _number \| string_ | `Infinity` |
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| selected-icon `v2.9.0` | 自定义右侧栏选中状态的图标 | _string_ | `success` |
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### Events
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| 事件名 | 说明 | 回调参数 |
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| ---------- | -------------------- | ------------------------- |
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| click-nav | 点击左侧导航时触发 | index：被点击的导航的索引 |
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| click-item | 点击右侧选择项时触发 | data: 该点击项的数据 |
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### Slots
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| 名称 | 说明 |
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| ------- | ------------------ |
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| content | 自定义右侧区域内容 |
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### Item 数据结构
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`items` 整体为一个数组，数组内包含一系列描述分类的对象，每个分类里，`text`表示当前分类的名称，`children`表示分类里的可选项。
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```js
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[
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{
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// 导航名称
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text: '所有城市',
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// 导航名称右上角徽标，2.5.6 版本开始支持
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badge: 3,
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// 是否在导航名称右上角显示小红点
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dot: true,
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// 导航节点额外类名
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className: 'my-class',
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// 该导航下所有的可选项
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children: [
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{
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// 名称
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text: '温州',
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// id，作为匹配选中状态的标识符
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id: 1,
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// 禁用选项
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disabled: true,
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},
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{
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text: '杭州',
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id: 2,
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},
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],
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},
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];
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```
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