mirror of
https://github.com/ant-design/ant-design.git
synced 2024-12-17 02:18:07 +08:00
87 lines
2.5 KiB
Markdown
87 lines
2.5 KiB
Markdown
---
|
|
order: 1
|
|
title:
|
|
zh-CN: 用户头像
|
|
en-US: Avatar
|
|
---
|
|
|
|
## zh-CN
|
|
|
|
点击上传用户头像，并使用 `beforeUpload` 限制用户上传的图片格式和大小。
|
|
|
|
> `beforeUpload` 的返回值可以是一个 Promise 以支持异步处理，如服务端校验等：[示例](https://upload-react-component.vercel.app/demo/before-upload#beforeupload)。
|
|
|
|
## en-US
|
|
|
|
Click to upload user's avatar, and validate size and format of picture with `beforeUpload`.
|
|
|
|
> The return value of function `beforeUpload` can be a Promise to check asynchronously. [demo](https://upload-react-component.vercel.app/demo/before-upload#beforeupload)
|
|
|
|
```tsx
|
|
import { LoadingOutlined, PlusOutlined } from '@ant-design/icons';
|
|
import { message, Upload } from 'antd';
|
|
import type { UploadChangeParam } from 'antd/es/upload';
|
|
import type { RcFile, UploadFile, UploadProps } from 'antd/es/upload/interface';
|
|
import React, { useState } from 'react';
|
|
|
|
const getBase64 = (img: RcFile, callback: (url: string) => void) => {
|
|
const reader = new FileReader();
|
|
reader.addEventListener('load', () => callback(reader.result as string));
|
|
reader.readAsDataURL(img);
|
|
};
|
|
|
|
const beforeUpload = (file: RcFile) => {
|
|
const isJpgOrPng = file.type === 'image/jpeg' || file.type === 'image/png';
|
|
if (!isJpgOrPng) {
|
|
message.error('You can only upload JPG/PNG file!');
|
|
}
|
|
const isLt2M = file.size / 1024 / 1024 < 2;
|
|
if (!isLt2M) {
|
|
message.error('Image must smaller than 2MB!');
|
|
}
|
|
return isJpgOrPng && isLt2M;
|
|
};
|
|
|
|
const App: React.FC = () => {
|
|
const [loading, setLoading] = useState(false);
|
|
const [imageUrl, setImageUrl] = useState<string>();
|
|
|
|
const handleChange: UploadProps['onChange'] = (info: UploadChangeParam<UploadFile>) => {
|
|
if (info.file.status === 'uploading') {
|
|
setLoading(true);
|
|
return;
|
|
}
|
|
if (info.file.status === 'done') {
|
|
// Get this url from response in real world.
|
|
getBase64(info.file.originFileObj as RcFile, url => {
|
|
setLoading(false);
|
|
setImageUrl(url);
|
|
});
|
|
}
|
|
};
|
|
|
|
const uploadButton = (
|
|
<div>
|
|
{loading ? <LoadingOutlined /> : <PlusOutlined />}
|
|
<div style={{ marginTop: 8 }}>Upload</div>
|
|
</div>
|
|
);
|
|
|
|
return (
|
|
<Upload
|
|
name="avatar"
|
|
listType="picture-card"
|
|
className="avatar-uploader"
|
|
showUploadList={false}
|
|
action="https://www.mocky.io/v2/5cc8019d300000980a055e76"
|
|
beforeUpload={beforeUpload}
|
|
onChange={handleChange}
|
|
>
|
|
{imageUrl ? <img src={imageUrl} alt="avatar" style={{ width: '100%' }} /> : uploadButton}
|
|
</Upload>
|
|
);
|
|
};
|
|
|
|
export default App;
|
|
```
|