mint/dashboard-v6/backup/components/course/UploadTexture.tsx

//上传封面组件
import _React, { useState } from "react";
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";

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 UploadTextureWidget = () => {
  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}
      beforeUpload={beforeUpload}
      onChange={handleChange}
    >
      {imageUrl ? (
        <img src={imageUrl} alt="avatar" style={{ width: "100%" }} />
      ) : (
        uploadButton
      )}
    </Upload>
  );
};

export default UploadTextureWidget;