H5 实现图片可预览放大等操作对库 react-photo-view 的封装和使用

小半 • 2022年12月25日下午5:25 • 前端开发 • 阅读 258

例如，Taro 实现的 H5，Taro对外的提供的预览图片没有放大功能，需要自己重新封装

封装 PreviewImage 组件

import { View } from '@tarojs/components';
import { useMemo } from 'react';
import { PhotoProvider, PhotoSlider } from 'react-photo-view';
import 'react-photo-view/dist/react-photo-view.css';

import './index.less';

interface IProps {
  visible: boolean;
  current: number;
  urls: string[];
  onClose: () => void;
  onChange?: (arg: number) => void;
  photoClosable?: boolean;
}

const PreviewImage: React.FC<IProps> = ({
  visible,
  current,
  urls = [],
  onClose,
  onChange,
  photoClosable = false,
  ...rest
}) => {
  const urlsArr = useMemo(() => {
    if (urls && !!urls.length) {
      const _urls = urls.filter(v => v);
      return _urls.map((item, index) => ({ src: item, key: index }));
    }
    return [];
  }, [urls]);

  return (
    <View className='xp-preview-image'>
      <PhotoProvider {...rest}>
        <PhotoSlider
          images={urlsArr}
          photoClosable={photoClosable}
          visible={visible}
          onClose={onClose}
          index={current}
          onIndexChange={onChange}
        />
      </PhotoProvider>
    </View>
  );
};
export default PreviewImage;

使用

  const [visible, setVisible] = useState<boolean>(false);
  const [current, setCurrent] = useState<number>(0);
  {visible && (
    <PreviewImage
      visible={visible}
      current={current}
      urls={[]}
      onClose={() => {
        setVisible(false);
      }}
      onChange={e => {
        setCurrent(e);
      }}
    />
  )}