vant/docs/examples-docs/zh-CN/image-preview.md
neverland 6c37a6906f
[new feature] ImagePreview support startPosition (#286)
* [bugfix] CouponList always show empty info

* [bugfix] add click feedback of buttons in components

* [Doc] add custom theme document

* [new feature] Notice bar support more props

* [bugfix] PullRefresh test cases

* [bugfix] unused NoticeBar style

* [bugfix] Swipe width calc error

* [Doc] english document of all action components

* [Doc] change document site path to /zanui/vant

* [Doc] fix

* [bugfix] uploader style error

* [bugfix] tabs document demo

* [new feature] Cell support vue-router target route

* [bugfix] add cell test cases

* update yarn.lock

* [bugfix] Tabbar cann't display info when use icon slot

* [Doc] update document title

* [bugfix] Dialog should reset button text when showed

* [new feature] CouponList add showCloseButton prop

* [new feature] Swipe add 'initialSwipe' prop

* [bugfix] NoticeBar text disappeared when page back

* [new feature] ImagePreview support startPosition

* fix: improve imagePreview test cases
2017-11-07 02:22:17 -06:00

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<style>
.demo-image-preview {
.van-button {
margin-left: 15px;
}
}
.van-image-preview {
img {
pointer-events: none;
}
}
</style>
<script>
import { ImagePreview } from 'packages';
export default {
methods: {
showImagePreview(position) {
ImagePreview([
'https://img.yzcdn.cn/upload_files/2017/03/15/FkubrzN7AgGwLlTeb1E89-T_ZjBg.png',
'https://img.yzcdn.cn/upload_files/2017/03/14/FmTPs0SeyQaAOSK1rRe1sL8RcwSY.jpeg',
'https://img.yzcdn.cn/upload_files/2017/03/15/FvexrWlG_WxtCE9Omo5l27n_mAG_.jpeg'
], typeof position === 'number' ? position : 0);
}
}
};
</script>
## ImagePreview 图片预览
### 使用指南
`ImagePreview`和其他组件不同不是通过HTML结构的方式来使用而是通过函数调用的方式。使用前需要先引入它。
```js
import { ImagePreview } from 'vant';
```
### 代码演示
#### 基础用法
:::demo 基础用法
```html
<van-button @click="showImagePreview">预览图片</van-button>
```
```javascript
export default {
methods: {
showImagePreview() {
ImagePreview([
'https://img.yzcdn.cn/1.jpg',
'https://img.yzcdn.cn/2.jpg'
]);
}
}
};
```
:::
#### 指定初始位置
:::demo 指定初始位置
```html
<van-button @click="showImagePreview(1)">指定初始位置</van-button>
```
```javascript
export default {
methods: {
showImagePreview(startPosition) {
ImagePreview([
'https://img.yzcdn.cn/1.jpg',
'https://img.yzcdn.cn/2.jpg'
], startPosition);
}
}
};
```
:::
### 方法参数
| 参数名 | 说明 | 类型 |
|-----------|-----------|-----------|
| imageUrls | 需要预览的图片 | `Array` |
| startPosition | 图片预览起始位置索引 | `Number` |