UploadSingleImg.tsx
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import { PlusOutlined } from '@ant-design/icons';
import type { GetProp, UploadFile, UploadProps } from 'antd';
import { Image, Upload } from 'antd';
import { useEffect, useState } from 'react';
type FileType = Parameters<GetProp<UploadProps, 'beforeUpload'>>[0];
const getBase64 = (file: FileType): Promise<string> =>
new Promise((resolve, reject) => {
const reader = new FileReader();
reader.readAsDataURL(file);
reader.onload = () => resolve(reader.result as string);
reader.onerror = (error) => reject(error);
});
export default ({ onFilesChange }) => {
const [previewOpen, setPreviewOpen] = useState(false);
const [previewImage, setPreviewImage] = useState('');
const [fileList, setFileList] = useState<UploadFile[]>([]);
const handlePreview = async (file: UploadFile) => {
if (!file.url && !file.preview) {
file.preview = await getBase64(file.originFileObj as FileType);
}
setPreviewImage(file.url || (file.preview as string));
setPreviewOpen(true);
};
const onPaste = async (e: ClipboardEvent) => {
const items = e.clipboardData.items;
for (let i = 0; i < items.length; i++) {
const item = items[i];
// 检查是否为文件类型，并且类型是图片
if (item.kind === 'file' && item.type.startsWith('image/')) {
const file = item.getAsFile();
if (file) {
const newFile = {
uid: Date.now(), // 生成唯一的 uid
name: file.name,
status: 'done',
url: URL.createObjectURL(file), // 生成临时 URL
originFileObj: file,
};
// 更新 fileList
const newFileList = [...fileList, newFile];
setFileList(newFileList);
onFilesChange(newFileList);
break; // 只处理第一个图片
}
}
}
};
useEffect(() => {
document.addEventListener('paste', onPaste);
return () => {
document.removeEventListener('paste', onPaste);
};
}, [fileList]); // 添加 fileList 依赖
const uploadButton = (
<button style={{ border: 0, background: 'none' }} type="button">
<PlusOutlined />
<div style={{ marginTop: 8 }}>Upload</div>
</button>
);
return (
<>
<Upload
listType="picture-card"
fileList={fileList}
onPreview={handlePreview}
onChange={({ fileList: newFileList }) => {
setFileList(newFileList);
onFilesChange(newFileList);
}}
>
{fileList.length >= 1 ? null : uploadButton}
</Upload>
{previewImage && (
<Image
wrapperStyle={{ display: 'none' }}
preview={{
visible: previewOpen,
onVisibleChange: (visible) => setPreviewOpen(visible),
afterOpenChange: (visible) => !visible && setPreviewImage(''),
}}
src={previewImage}
/>
)}
</>
);
};