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react中實(shí)現(xiàn)拖拽排序react-dnd功能_React

作者：waillyer ? 更新時(shí)間： 2023-04-08 編程語言

dnd文檔

html 拖拽排序

import React, { useState, useRef } from 'react';
import { cloneDeep } from 'lodash';
import styles from './index.less';

const defaultList = [
    {
        id: 1,
        name: '11',
    },
    {
        id: 2,
        name: '22',
    },
];

export default ({ children = '', arr = [] }) => {
    const [list, setList] = useState([...defaultList]);
    const startRef = useRef(null);
    const changePosition = (dragIndex, hoverIndex) => {
        const data = cloneDeep(list);
        const temp = data[dragIndex];
        // 交換位置
        data[dragIndex] = data[hoverIndex];
        data[hoverIndex] = temp;
        setList(data);
    };
    const onDragStart = index => {
        // console.log('onDragStart', index);
        startRef.current = index;
    };
    const onDragEnd = (e, index) => {
        e.preventDefault();
    };
    const onDragOver = (e, index) => {
        e.preventDefault();
    };
    const onDragEnter = (e, hoverIndex) => {
        e.preventDefault();
        if (startRef.current === hoverIndex) {
            return;
        }
        startRef.current = hoverIndex; // 將當(dāng)前當(dāng)前移動(dòng)到Box的index賦值給當(dāng)前拖動(dòng)的box，不然會(huì)出現(xiàn)兩個(gè)盒子瘋狂抖動(dòng)！
        changePosition(startRef.current, hoverIndex);
        // console.log('onDragEnd', hoverIndex, '排序');
    };
    return (
        <div className={styles.list_container}>
            {list.map((item, index) => {
                return (
                    <div
                        className={styles.list_item}
                        draggable
                        key={item?.id}
                        onDragStart={$event => onDragStart(index)}
                        onDragEnd={$event => onDragEnd($event, index)}
                        onDragEnter={$event => onDragEnter($event, index)}
                        onDragOver={$event => onDragOver($event, index)}
                    >
                        {item.name}
                        {/* {children} */}
                    </div>
                );
            })}
        </div>
    );
};

拖拽組件封裝

import React, { useRef } from 'react';
import { useDrop, useDrag } from 'react-dnd';
import styles from './index.less';
// 拖拽排序
export default ({ id = '', index = '', changePosition = () => {}, className = {}, children, rowKey = '' }) => {
    const ref = useRef(null);
    // 因?yàn)闆]有定義收集函數(shù)，所以返回值數(shù)組第一項(xiàng)不要
    const [, drop] = useDrop({
        accept: 'DragDropBox', // 只對(duì)useDrag的type的值為DragDropBox時(shí)才做出反應(yīng)
        hover: (item, monitor) => {
            // 這里用節(jié)流可能會(huì)導(dǎo)致拖動(dòng)排序不靈敏
            if (!ref.current) return;
            const dragIndex = item.index;
            const hoverIndex = index;
            if (dragIndex === hoverIndex) return; // 如果回到自己的坑，那就什么都不做
            changePosition(dragIndex, hoverIndex); // 調(diào)用傳入的方法完成交換
            item.index = hoverIndex; // 將當(dāng)前當(dāng)前移動(dòng)到Box的index賦值給當(dāng)前拖動(dòng)的box，不然會(huì)出現(xiàn)兩個(gè)盒子瘋狂抖動(dòng)！
        },
    });

    const [{ isDragging }, drag] = useDrag({
        item: {
            type: 'DragDropBox',
            id,
            index,
        },
        collect: monitor => ({
            isDragging: monitor.isDragging(), // css樣式需要
        }),
    });

    return (
        // ref 這樣處理可以使得這個(gè)組件既可以被拖動(dòng)也可以接受拖動(dòng)
        <div ref={drag(drop(ref))} style={{ opacity: isDragging ? 0.5 : 1 }} className={className.dragBox}>
            <span key={rowKey} className={styles.reviewer}>
                {children}
            </span>
        </div>
    );
};

使用組件

import React from 'react';
import { DndProvider } from 'react-dnd';
import { useSelector } from 'umi';
import { cloneDeep } from 'lodash';
import HTML5Backend from 'react-dnd-html5-backend';
import ReactDndDragSort from '@/components/ReactDndDragSort';
import styles from './index.less';

export default ({ currentModel, dispatch }) => {
    const { reviewerList = [] } = useSelector(state => state[currentModel]);

    const changePosition = (dragIndex, hoverIndex) => {
        const data = cloneDeep(reviewerList);
        const temp = data[dragIndex];
        // 交換位置
        data[dragIndex] = data[hoverIndex];
        data[hoverIndex] = temp;
        // setBoxList(data);
        dispatch({
            type: `${currentModel}/overrideStateProps`,
            payload: {
                reviewerList: data,
            },
        });
    };
    return (
        <>
            <div className={styles.reviewerContainer}>
                <DndProvider backend={HTML5Backend}>
                    {reviewerList?.length ? (
                        <div style={{ display: 'flex' }}>
                            {reviewerList.map((item, index) => {
                                return (
                                    <ReactDndDragSort
                                        rowKey={item?.id}
                                        index={index}
                                        id={item?.id}
                                        changePosition={changePosition}
                                    >
                                        <span key={item?.id} className={styles.reviewer}>
                                            <div className={styles.reviewerImg}>
                                                <span
                                                    className="saas saas-failure1"
                                                    onClick={() => {
                                                        const listFilter = reviewerList.filter(
                                                            (_, itemIndex) => itemIndex !== index,
                                                        );
                                                        dispatch({
                                                            type: `${currentModel}/overrideStateProps`,
                                                            payload: {
                                                                reviewerList: listFilter,
                                                            },
                                                        });
                                                    }}
                                                />
                                            </div>
                                            <div className={styles.reviewerTxt}>{item.name}</div>
                                        </span>
                                    </ReactDndDragSort>
                                );
                            })}
                        </div>
                    ) : null}
                </DndProvider>
            </div>
        </>
    );
};

ts 版本

import React, { useRef } from "react";
import { useDrop, useDrag } from "react-dnd";
import "./index.less";
// dnd拖拽排序
export default (props: any) => {
  const {
    id = "",
    index = "",
    changePosition = () => {},
    className = "",
    children,
    rowKey = "",
  } = props;
  const ref: any = useRef(null);
  // 因?yàn)闆]有定義收集函數(shù)，所以返回值數(shù)組第一項(xiàng)不要
  const [, drop] = useDrop({
    accept: "DragDropBox", // 只對(duì)useDrag的type的值為DragDropBox時(shí)才做出反應(yīng)
    hover: (item: any, monitor: any) => {
      // 這里用節(jié)流可能會(huì)導(dǎo)致拖動(dòng)排序不靈敏
      if (!ref.current) return;
      const dragIndex = item.index;
      const hoverIndex = index;
      if (dragIndex === hoverIndex) return; // 如果回到自己的坑，那就什么都不做
      changePosition(dragIndex, hoverIndex); // 調(diào)用傳入的方法完成交換
      item.index = hoverIndex; // 將當(dāng)前當(dāng)前移動(dòng)到Box的index賦值給當(dāng)前拖動(dòng)的box，不然會(huì)出現(xiàn)兩個(gè)盒子瘋狂抖動(dòng)！
    },
  });

  const [{ isDragging }, drag] = useDrag(() => ({
    type: "DragDropBox",
    item: { id, type: "DragDropBox", index },
    collect: (monitor) => ({
      isDragging: monitor.isDragging(), // css樣式需要
    }),
  }));
  const changeRef = drag(drop(ref));

  return (
    // ref 這樣處理可以使得這個(gè)組件既可以被拖動(dòng)也可以接受拖動(dòng)
    <div
      //@ts-ignore
      ref={changeRef}
      style={{ opacity: isDragging ? 0.5 : 1 }}
      className="dragBox"
    >
      <span key={rowKey} className={className}>
        {children}
      </span>
    </div>
  );
};

ts使用

import React, { useState } from "react";
import { DndProvider } from "react-dnd";
import { useSelector } from "react-redux";
//@ts-ignore
import { cloneDeep } from "lodash";
import { HTML5Backend } from "react-dnd-html5-backend";
import ReactDndDragSort from "@/components/ReactDndDragSort";
import "./index.less";
console.log("HTML5Backend", HTML5Backend);

export default () => {
  const dList = [
    {
      id: 99,
      name: "組1",
    },
    {
      id: 22,
      name: "組2",
    },
  ];
  const [reviewerList, setReviewerList] = useState(dList);

  const changePosition = (dragIndex: any, hoverIndex: any) => {
    const data = cloneDeep(reviewerList);
    const temp = data[dragIndex];
    // 交換位置
    data[dragIndex] = data[hoverIndex];
    data[hoverIndex] = temp;
    console.log("交換完成---", data);
    setReviewerList(data);
  };
  return (
    <>
      <div className="reviewerContainer">
        <DndProvider backend={HTML5Backend}>
          {reviewerList?.length ? (
            <div>
              {reviewerList.map((item: any, index: any) => {
                return (
                  <ReactDndDragSort
                    rowKey={item?.id}
                    index={index}
                    id={item?.id}
                    changePosition={changePosition}
                  >
                    <div key={item?.id} className="reviewer">
                      <div className="reviewerTxt">{item.name}</div>
                    </div>
                  </ReactDndDragSort>
                );
              })}
            </div>
          ) : null}
        </DndProvider>
      </div>
    </>
  );
};

原文鏈接：https://blog.csdn.net/waillyer/article/details/121522841

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