antd upload上传图片

好的，您可以按照以下步骤来实现antd upload上传图片：

1. 首先安装antd和axios。

npm install antd axios --save

2. 在您的组件中引入antd upload组件。

import { Upload, message } from 'antd';
import { LoadingOutlined, PlusOutlined } from '@ant-design/icons';

class UploadImage extends React.Component {
  state = {
    loading: false,
    imageUrl: '',
  };

  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 { loading, imageUrl } = this.state;
    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={this.handleChange}
      >
        {imageUrl ? <img src={imageUrl} alt="avatar" style={{ width: '100%' }} /> : uploadButton}
      </Upload>
    );
  }
}

3. 在handleChange方法中，您需要将上传的图片转换为base64格式，以便于后续的保存和显示。

import { Upload, message } from 'antd';
import { LoadingOutlined, PlusOutlined } from '@ant-design/icons';

function getBase64(file) {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.readAsDataURL(file);
    reader.onload = () => resolve(reader.result);
    reader.onerror = error => reject(error);
  });
}

class UploadImage extends React.Component {
  state = {
    loading: false,
    imageUrl: '',
  };

  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 { loading, imageUrl } = this.state;
    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={this.handleChange}
      >
        {imageUrl ? <img src={imageUrl} alt="avatar" style={{ width: '100%' }} /> : uploadButton}
      </Upload>
    );
  }
}

4. 最后，在handleSubmit方法中，您可以将base64格式的图片传给后端进行保存。

import { Upload, message } from 'antd';
import { LoadingOutlined, PlusOutlined } from '@ant-design/icons';
import axios from 'axios';

function getBase64(file) {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.readAsDataURL(file);
    reader.onload = () => resolve(reader.result);
    reader.onerror = error => reject(error);
  });
}

class UploadImage extends React.Component {
  state = {
    loading: false,
    imageUrl: '',
  };

  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,
        }),
      );
    }
  };

  handleSubmit = () => {
    axios.post('/api/upload', {
      image: this.state.imageUrl,
    }).then(response => {
      message.success('Image uploaded successfully!');
    }).catch(error => {
      message.error('Failed to upload image!');
    });
  };

  render() {
    const { loading, imageUrl } = this.state;
    const uploadButton = (
      <div>
        {loading ? <LoadingOutlined /> : <PlusOutlined />}
        <div style={{ marginTop: 8 }}>Upload</div>
      </div>
    );
    return (
      <div>
        <Upload
          name="avatar"
          listType="picture-card"
          className="avatar-uploader"
          showUploadList={false}
          action="https://www.mocky.io/v2/5cc8019d300000980a055e76"
          beforeUpload={beforeUpload}
          onChange={this.handleChange}
        >
          {imageUrl ? <img src={imageUrl} alt="avatar" style={{ width: '100%' }} /> : uploadButton}
        </Upload>
        <Button type="primary" onClick={this.handleSubmit}>Submit</Button>
      </div>
    );
  }
}

以上就是antd upload上传图片的实现步骤。