movm/es/LargerImg/index.js

一个基于antdsegin的ui组件

function _toConsumableArray(arr) { return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread(); }

function _nonIterableSpread() { throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }

function _iterableToArray(iter) { if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter); }

function _arrayWithoutHoles(arr) { if (Array.isArray(arr)) return _arrayLikeToArray(arr); }

function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }

function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

function _iterableToArrayLimit(arr, i) { var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"]; if (_i == null) return; var _arr = []; var _n = true; var _d = false; var _s, _e; try { for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }

function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }

import React from "react";
import { LeftOutlined, RightOutlined } from "@ant-design/icons";
import { useEffect, useRef, useState } from "react";
import "./index.css";

var LargerImg = function LargerImg(_ref) {
  var showItem = _ref.showItem,
      IsClose = _ref.IsClose,
      imgUrl = _ref.imgUrl;

  var close = function close() {
    IsClose();
  };

  var _useState = useState([]),
      _useState2 = _slicedToArray(_useState, 2),
      imgUrlList = _useState2[0],
      setImgUrlList = _useState2[1];

  var _useState3 = useState(0),
      _useState4 = _slicedToArray(_useState3, 2),
      count = _useState4[0],
      setCount = _useState4[1];

  var onLeft = function onLeft(e) {
    e.stopPropagation();

    if (count > 0) {
      setCount(count - 1);
    }
  };

  var onRight = function onRight(e) {
    e.stopPropagation();

    if (count < imgUrlList.length - 1) {
      setCount(count + 1);
    }
  };

  useEffect(function () {
    // 通过传来的图片地址在数组里做对比获取索引 并复制给count 以保证点开图片时预览的是当前点击的图片
    var index = imgUrlList.indexOf(showItem);
    setImgUrlList(_toConsumableArray(imgUrl));
    setCount(index); // console.log('showItem', )

    return function () {
      setCount(0);
    };
  }, [showItem, imgUrl]);
  /* 拖动图片 */

  var handleDrag = function handleDrag(e) {
    var _zoomImg$current = zoomImg.current,
        offsetLeft = _zoomImg$current.offsetLeft,
        offsetTop = _zoomImg$current.offsetTop,
        onmousemove = _zoomImg$current.onmousemove,
        clientWidth = _zoomImg$current.clientWidth,
        style = _zoomImg$current.style;
    var x = e.clientX - offsetLeft;
    var y = e.clientY - offsetTop;

    document['onmousemove'] = function (e) {
      style.left = e.clientX - x + 'px';
      style.top = e.clientY - y + 'px';
    };

    document.onmouseup = function () {
      document['onmousemove'] = null;
    };
  };
  /* 鼠标滚动放大 */


  var zoomImg = useRef(null);

  var handleZoom = function handleZoom(e) {
    var _zoomImg$current2 = zoomImg.current,
        clientWidth = _zoomImg$current2.clientWidth,
        style = _zoomImg$current2.style;

    if (e.nativeEvent.deltaY <= 0 && clientWidth < 2000) {
      style.width = clientWidth + 50 + 'px'; //图片宽度每次增加50

      style.left = style.left - 1 % +'px'; //随便设置  不重要
    } else if (e.nativeEvent.deltaY > 0) {
      if (clientWidth > 400) {
        style.width = clientWidth - 50 + 'px'; //图片宽度

        style.left = style.left + 1 % +'px';
      } // else {
      //   style.left = 0
      // }

    }
  };

  return /*#__PURE__*/React.createElement(React.Fragment, null, showItem && /*#__PURE__*/React.createElement("div", {
    className: "showBigImg",
    onClick: close
  }, /*#__PURE__*/React.createElement("img", {
    ref: zoomImg,
    className: "zoomImg",
    onDragStart: function onDragStart(e) {
      e.preventDefault();
      return false;
    },
    onMouseDown: function onMouseDown(e) {
      e.persist();
      handleDrag(e);
    },
    onWheel: function onWheel(e) {
      handleZoom(e);
    },
    onClick: function onClick(e) {
      e.stopPropagation();
    },
    src: imgUrlList[count],
    alt: ""
  }), imgUrlList.length > 1 && /*#__PURE__*/React.createElement(React.Fragment, null, /*#__PURE__*/React.createElement("span", {
    className: "lengthTxt"
  }, "\u7B2C ", count + 1, " \u5F20 , \u5171 ", imgUrlList.length, " \u5F20"), /*#__PURE__*/React.createElement("span", {
    className: "onLeft",
    style: {
      cursor: "".concat(count === 0 ? 'no-drop' : 'pointer')
    },
    onClick: function onClick(e) {
      onLeft(e);
    }
  }, /*#__PURE__*/React.createElement(LeftOutlined, null)), /*#__PURE__*/React.createElement("span", {
    className: "onRight",
    style: {
      cursor: "".concat(count === imgUrlList.length - 1 ? 'no-drop' : 'pointer')
    },
    onClick: function onClick(e) {
      onRight(e);
    }
  }, /*#__PURE__*/React.createElement(RightOutlined, null)))));
};

export default LargerImg;