[Improvement] Reorganize document (#1066)
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## Actionsheet 行动按钮
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### 使用指南
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``` javascript
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import { Actionsheet } from 'vant';
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Vue.use(Actionsheet);
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```
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### 代码演示
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#### 基础用法
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需要传入一个`actions`的数组,数组的每一项是一个对象,对象属性见文档下方表格。
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```html
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<van-actionsheet v-model="show" :actions="actions" />
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```
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```javascript
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export default {
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data() {
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return {
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show: false,
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actions: [
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{
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name: '选项',
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callback: this.onClick
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},
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{
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name: '选项',
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subname: '描述信息'
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},
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{
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name: '选项',
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loading: true
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}
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]
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};
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},
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methods: {
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onClick(item) {
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Toast(item.name);
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}
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}
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}
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```
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#### 带取消按钮的 Actionsheet
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如果传入了`cancelText`属性,且不为空,则会在下方显示一个取消按钮,点击会将当前`Actionsheet`关闭。
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```html
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<van-actionsheet v-model="show" :actions="actions" cancel-text="取消" />
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```
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#### 带标题的 Actionsheet
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如果传入了`title`属性,且不为空,则另外一种样式的`Actionsheet`,里面内容需要自定义。
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```html
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<van-actionsheet v-model="show" title="支持以下配送方式">
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<p>一些内容</p>
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</van-actionsheet>
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```
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### API
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| 参数 | 说明 | 类型 | 默认值 |
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|-----------|-----------|-----------|-------------|
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| actions | 行动按钮数组 | `Array` | `[]` |
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| title | 标题 | `String` | - |
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| cancel-text | 取消按钮文案 | `String` | - |
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| overlay | 是否显示遮罩 | `Boolean` | - |
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| close-on-click-overlay | 点击遮罩是否关闭`Actionsheet` | `Boolean` | - |
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| get-container | 指定挂载的 HTML 节点 | `() => HTMLElement` | - |
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### Event
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| 事件名 | 说明 | 参数 |
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|-----------|-----------|-----------|
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| cancel | 取消按钮点击时触发 | - |
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### actions
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`API`中的`actions`为一个对象数组,数组中的每一个对象配置每一列,每一列有以下`key`:
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| key | 说明 |
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|-----------|-----------|
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| name | 标题 |
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| subname | 二级标题 |
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| className | 为对应列添加特殊的`class` |
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| loading | 是否是`loading`状态 |
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| callback | 点击时的回调。该回调接受一个参数,参数为当前点击`action`的对象信息 |
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