## PullRefresh
### Install
``` javascript
import { PullRefresh } from 'vant';
Vue.component(PullRefresh.name, PullRefresh);
```
### Usage
:::demo
```html
刷新次数: {{ count }}
```
```javascript
export default {
data() {
return {
count: 0,
isLoading: false
}
},
watch: {
isLoading() {
if (this.isLoading) {
setTimeout(() => {
Toast('刷新成功');
this.isLoading = false;
this.count++;
}, 500);
}
}
}
}
```
:::
### API
| Attribute | Description | Type | Default | Accepted Values |
|-----------|-----------|-----------|-------------|-------------|
| v-model | 是否在加载中 | `Boolean` | - | - |
| pullingText | 下拉过程中顶部文案 | `String` | `下拉即可刷新...` | - |
| loosingText | 释放过程中顶部文案 | `String` | `释放即可刷新...` | - |
| loadingText | 加载过程中顶部文案 | `String` | `加载中...` | - |
| animationDuration | 动画时长 | `Number` | `300` | - |
| headHeight | 顶部内容高度 | `Number` | `50` | - |
### Slot
| name | Description |
|-----------|-----------|
| - | 自定义内容 |
| normal | 非下拉状态时顶部内容 |
| pulling | 下拉过程中顶部内容 |
| loosing | 释放过程中顶部内容 |
| loading | 加载过程中顶部内容 |