mirror of
https://github.com/ant-design/ant-design.git
synced 2024-11-30 06:09:34 +08:00
93 lines
2.3 KiB
Markdown
93 lines
2.3 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](http://react-component.github.io/upload/examples/beforeUpload.html)。
|
|
|
|
## 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](http://react-component.github.io/upload/examples/beforeUpload.html)
|
|
|
|
````jsx
|
|
import { Upload, Icon, message } from 'antd';
|
|
|
|
function getBase64(img, callback) {
|
|
const reader = new FileReader();
|
|
reader.addEventListener('load', () => callback(reader.result));
|
|
reader.readAsDataURL(img);
|
|
}
|
|
|
|
function beforeUpload(file) {
|
|
const isJPG = file.type === 'image/jpeg';
|
|
if (!isJPG) {
|
|
message.error('You can only upload JPG file!');
|
|
}
|
|
const isLt2M = file.size / 1024 / 1024 < 2;
|
|
if (!isLt2M) {
|
|
message.error('Image must smaller than 2MB!');
|
|
}
|
|
return isJPG && isLt2M;
|
|
}
|
|
|
|
class Avatar extends React.Component {
|
|
state = {
|
|
loading: false,
|
|
};
|
|
|
|
handleChange = (info) => {
|
|
if (info.file.status === 'uploading') {
|
|
this.setState({ loading: true });
|
|
return;
|
|
}
|
|
if (info.file.status === 'done') {
|
|
// Get this url from response in real world.
|
|
getBase64(info.file.originFileObj, imageUrl => this.setState({
|
|
imageUrl,
|
|
loading: false,
|
|
}));
|
|
}
|
|
}
|
|
|
|
render() {
|
|
const uploadButton = (
|
|
<div>
|
|
<Icon type={this.state.loading ? 'loading' : 'plus'} />
|
|
<div className="ant-upload-text">Upload</div>
|
|
</div>
|
|
);
|
|
const imageUrl = this.state.imageUrl;
|
|
return (
|
|
<Upload
|
|
name="avatar"
|
|
listType="picture-card"
|
|
className="avatar-uploader"
|
|
showUploadList={false}
|
|
action="//jsonplaceholder.typicode.com/posts/"
|
|
beforeUpload={beforeUpload}
|
|
onChange={this.handleChange}
|
|
>
|
|
{imageUrl ? <img src={imageUrl} alt="avatar" /> : uploadButton}
|
|
</Upload>
|
|
);
|
|
}
|
|
}
|
|
|
|
ReactDOM.render(<Avatar />, mountNode);
|
|
````
|
|
|
|
````css
|
|
.avatar-uploader > .ant-upload {
|
|
width: 128px;
|
|
height: 128px;
|
|
}
|
|
````
|