2020-07-28 10:03:53 +08:00
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---
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title: Image 图片
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2020-07-29 16:20:21 +08:00
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description:
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2020-07-28 10:03:53 +08:00
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type: 0
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group: null
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menuName: Image
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2020-07-29 16:20:21 +08:00
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icon:
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2020-07-28 10:03:53 +08:00
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order: 27
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---
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2020-07-29 16:20:21 +08:00
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2020-07-28 10:03:53 +08:00
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图片格式输入，默认 amis 会直接存储在 FEX 的 hiphoto 里面，提交到 form 是直接的图片 url。
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## 基本用法
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```schema:height="300" scope="body"
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{
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"type": "form",
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"api": "https://houtai.baidu.com/api/mock2/form/saveForm",
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"controls": [
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{
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"type": "image",
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"name": "image",
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"label": "image",
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"reciever": "https://houtai.baidu.com/api/upload/file"
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}
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]
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}
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```
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## 限制文件类型
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可以配置`accept`来限制可选择的文件类型，格式是文件后缀名`.xxx`
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```schema:height="350" scope="body"
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{
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"type": "form",
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"api": "https://houtai.baidu.com/api/mock2/form/saveForm",
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"controls": [
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{
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"type": "image",
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"name": "image",
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"label": "限制只能上传jpg图片",
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"accept": ".jpg",
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"reciever": "https://houtai.baidu.com/api/upload/file"
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}
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]
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}
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```
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想要限制多个类型，则用逗号分隔，例如：`.jpg,.png`
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## 支持裁剪
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```schema:height="350" scope="body"
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{
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"type": "form",
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"api": "https://houtai.baidu.com/api/mock2/form/saveForm",
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"controls": [
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{
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"type": "image",
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"name": "image",
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"label": "限制只能上传jpg图片",
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"accept": ".jpg",
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"reciever": "https://houtai.baidu.com/api/upload/file",
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"crop": true
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}
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]
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}
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```
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2020-11-13 15:21:41 +08:00
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## 自动填充
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上传成功后，可以通过配置 `autoFill` 将上传接口返回的值填充到某个表单项中：
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```schema:height="300" scope="body"
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{
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"type": "form",
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"api": "https://houtai.baidu.com/api/mock2/form/saveForm",
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"controls": [
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{
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"type": "image",
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"name": "image",
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"label": "image",
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"reciever": "https://houtai.baidu.com/api/upload/file",
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"autoFill": {
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"myUrl": "${url}"
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}
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},
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{
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"type": "text",
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"name": "myUrl",
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"label": "url"
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}
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]
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}
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```
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上例中，image 组件上传后，接口返回格式例如如下：
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```json
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{
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"value": "xxxxxxx",
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"filename": "xxxx.csv",
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"url": "http://xxxx.xxx.xxx"
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}
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```
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然后 image 上配置：
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```json
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"autoFill": {
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"myUrl": "${url}"
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}
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```
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这样上传成功后，会把接口中的 `url` 变量，赋值给 `myUrl` 变量
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2020-07-28 10:03:53 +08:00
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## 属性表
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除了支持 [普通表单项属性表](./formitem#%E5%B1%9E%E6%80%A7%E8%A1%A8) 中的配置以外，还支持下面一些配置
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2020-09-15 11:38:16 +08:00
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| 属性名 | 类型 | 默认值 | 说明 |
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| ---------------- | ------------------------------- | ---------------------- | -------------------------------------------------------------------------------------------------- |
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| reciever | [API](../../types/api) | | 上传文件接口 |
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| accept | `string` | `.jpeg,.jpg,.png,.gif` | 支持的图片类型格式，请配置此属性为图片后缀，例如`.jpg,.png` |
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2020-09-24 10:52:52 +08:00
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| maxSize | `number` | | 默认没有限制，当设置后，文件大小大于此值将不允许上传。单位为`KB` |
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2020-09-15 11:38:16 +08:00
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| maxLength | `number` | | 默认没有限制，当设置后，一次只允许上传指定数量文件。 |
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| multiple | `boolean` | `false` | 是否多选。 |
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| joinValues | `boolean` | `true` | [拼接值](./options#%E6%8B%BC%E6%8E%A5%E5%80%BC-joinvalues) |
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| extractValue | `boolean` | `false` | [提取值](./options#%E6%8F%90%E5%8F%96%E5%A4%9A%E9%80%89%E5%80%BC-extractvalue) |
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| delimeter | `string` | `,` | [拼接符](./options#%E6%8B%BC%E6%8E%A5%E7%AC%A6-delimiter) |
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| autoUpload | `boolean` | `true` | 否选择完就自动开始上传 |
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| hideUploadButton | `boolean` | `false` | 隐藏上传按钮 |
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| fileField | `string` | `file` | 如果你不想自己存储，则可以忽略此属性。 |
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| crop | `boolean`或`{"aspectRatio":""}` | | 用来设置是否支持裁剪。 |
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| crop.aspectRatio | `number` | | 裁剪比例。浮点型，默认 `1` 即 `1:1`，如果要设置 `16:9` 请设置 `1.7777777777777777` 即 `16 / 9`。。 |
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2020-10-19 14:26:38 +08:00
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| crop.rotatable | `boolean` | `false` | 裁剪时是否可旋转 |
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| crop.scalable | `boolean` | `false` | 裁剪时是否可缩放 |
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| crop.viewMode | `number` | `1` | 裁剪时的查看模式，0 是无限制 |
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2020-09-15 11:38:16 +08:00
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| limit | Limit | | 限制图片大小，超出不让上传。 |
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2020-07-28 10:03:53 +08:00
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### Limit 属性表
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| 属性名 | 类型 | 默认值 | 说明 |
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| ----------- | -------- | ------ | --------------------------------------------------------------------------------------------------------------------------------------------------- |
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| width | `number` | | 限制图片宽度。 |
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| height | `number` | | 限制图片高度。 |
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| minWidth | `number` | | 限制图片最小宽度。 |
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| minHeight | `number` | | 限制图片最小高度。 |
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| maxWidth | `number` | | 限制图片最大宽度。 |
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| maxHeight | `number` | | 限制图片最大高度。 |
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| aspectRatio | `number` | | 限制图片宽高比，格式为浮点型数字，默认 `1` 即 `1:1`，如果要设置 `16:9` 请设置 `1.7777777777777777` 即 `16 / 9`。 如果不想限制比率，请设置空字符串。 |
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