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128 lines
3.2 KiB
Markdown
128 lines
3.2 KiB
Markdown
# DropdownMenu 下拉菜单
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### 引入
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``` javascript
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import { DropdownMenu, DropdownItem } from 'vant';
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Vue.use(DropdownMenu).use(DropdownItem);
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```
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## 代码演示
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### 基础用法
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```html
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<van-dropdown-menu>
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<van-dropdown-item v-model="value1" :options="option1" />
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<van-dropdown-item v-model="value2" :options="option2" />
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</van-dropdown-menu>
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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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value1: 0,
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value2: 'a',
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option1: [
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{ text: '全部商品', value: 0 },
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{ text: '新款商品', value: 1 },
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{ text: '活动商品', value: 2 }
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],
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option2: [
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{ text: '默认排序', value: 'a' },
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{ text: '好评排序', value: 'b' },
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{ text: '销量排序', value: 'c' },
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]
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}
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}
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};
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```
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### 自定义菜单内容
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通过插槽可以自定义`DropdownItem`的内容，此时需要使用实例上的`toggle`方法手动控制菜单的显示
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```html
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<van-dropdown-menu>
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<van-dropdown-item v-model="value" :options="option" />
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<van-dropdown-item title="筛选" ref="item">
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<van-switch-cell v-model="switch1" title="包邮" />
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<van-switch-cell v-model="switch2" title="团购" />
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<van-button block type="info" @click="onConfirm">确认</van-button>
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</van-dropdown-item>
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</van-dropdown-menu>
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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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value: 0,
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switch1: false,
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switch2: false,
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option: [
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{ text: '全部商品', value: 0 },
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{ text: '新款商品', value: 1 },
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{ text: '活动商品', value: 2 }
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]
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}
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},
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methods: {
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onConfirm() {
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this.$refs.item.toggle();
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}
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}
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};
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```
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### 禁用菜单
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```html
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<van-dropdown-menu>
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<van-dropdown-item v-model="value1" disabled :options="option1" />
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<van-dropdown-item v-model="value2" disabled :options="option2" />
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</van-dropdown-menu>
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```
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## API
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### DropdownMenu Props
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| 参数 | 说明 | 类型 | 默认值 | 版本 |
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|------|------|------|------|------|
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| active-color | 菜单标题和选项的选中态颜色 | `String` | `#1989fa` | - |
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| z-index | 菜单栏 z-index 层级 | `Number` | `10` | - |
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| duration | 动画时长，单位秒 | `Number` | `0.2` | 2.0.0 |
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| overlay | 是否显示遮罩层 | `Boolean` | `true` | - |
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| close-on-click-overlay | 是否在点击遮罩层后关闭菜单 | `Boolean` | `true` | - |
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### DropdownItem Props
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| 参数 | 说明 | 类型 | 默认值 | 版本 |
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|------|------|------|------|------|
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| value | 当前选中项对应的 value，可以通过`v-model`双向绑定 | `String | Number` | - | - |
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| title | 菜单项标题 | `String` | 当前选中项文字 | - |
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| options | 选项数组 | `Array` | `[]` | - |
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| disabled | 是否禁用菜单 | `Boolean` | `false` | - |
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| title-class | 标题额外类名 | `String` | - | - |
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### DropdownItem Events
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| 事件名 | 说明 | 回调参数 |
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|------|------|------|
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| change | 点击选项导致 value 变化时触发 | value |
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| open | 打开菜单栏时触发 | - |
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| opened | 打开菜单栏且动画结束后触发 | - |
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| close | 关闭菜单栏时触发 | - |
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### DropdownItem 方法
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通过 ref 可以获取到 DropdownItem 实例并调用实例方法
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| 方法名 | 参数 | 返回值 | 介绍 |
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|------|------|------|------|
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| toggle | show: boolean | - | 切换菜单是否展示 |
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