悬浮球 可拖拽-支持鼠标和触控

悬浮球 可拖拽-支持鼠标和触控--react写法

直接上代码，js代码片段如下

import React, { useRef, useState, useEffect } from 'react';
import { useHistory, withRouter } from 'react-router-dom';
import './index.css';

let firstTime = 0, lastTime = 0;
const FloatingBall = (props) => {
  const history = useHistory();
  const [position, setPosition] = useState({ x: 1362, y: 782 });
  const [positionChildern, setPositionChildern] = useState({ x: 60, y: 60 });
  const [isShow, setIsShow] = useState(false);
  const ballSize = 64;
  //悬浮球点击
  const onClick = (event) => {
    if ((lastTime - firstTime) > 200) return
    setIsShow(!isShow)
    event.preventDefault();
  }
  //菜单点击
  const menuClick = (event, url) => {
    if (url.indexOf(getUrl()) > -1) {
      history.push(url.replace(getUrl(), ''))
    } else {
      window.location.href = url
    }
    event.preventDefault();
  }
  const getUrl = () => {
    let baseUrl = ''
    switch (process.env.REACT_APP_ENV) {
      case 'test':
        baseUrl = 'http://...'
        break
      case 'prod':
        baseUrl = 'https://...'
        break
      default:
        baseUrl = 'https://...'
    }
    return baseUrl
  }
  useEffect(() => {
    if (isShow) {
      const screenWidth = document.documentElement.clientWidth;
      const screenHeight = document.documentElement.clientHeight;
      const baseWidth = 1920 / screenWidth;
      const baseHeight = 1080 / screenHeight;
      var height = document.getElementsByClassName("custom-menu-box")[0].offsetHeight;
      let childernX = position.x > (screenWidth / 2) * baseWidth ? -250 : 30
      let childernY = position.y > (screenHeight / 2) * baseHeight ? -(height - 30) : 30
      setPositionChildern({ x: childernX, y: childernY })
    }
  }, [isShow]);
  useEffect(() => {
    //为true时会影响拖拽后的逻辑，只能为false进行设置
    if (!props.isBallshow) {
      setIsShow(props.isBallshow)
    }
  }, [props.isBallshow]);
  const ballRef = useRef(null);
  const handleMouseDown = (e) => {
    firstTime = new Date().getTime();
    const ball = ballRef.current;
    let newX, newY;
    const handleMouseMove = (e) => {
      lastTime = new Date().getTime();
      if (isShow) {
        setIsShow(false)
      }
      //支持触控
      const newLeft = e.touches ? e.touches[0].clientX : e.clientX;
      const newTop = e.touches ? e.touches[0].clientY : e.clientY;

      // 使用 document.documentElement.clientHeight 获取视口高度
      const screenWidth = document.documentElement.clientWidth;
      const screenHeight = document.documentElement.clientHeight;
      const baseWidth = 1920 / screenWidth;
      const baseHeight = 1080 / screenHeight;
      // 边界检测，确保悬浮球不会超出视口---(ballSize/2)是球球一半值，处理鼠标在球球中心
      if (newLeft >= (ballSize / 2) && newLeft - (ballSize / 2) <= screenWidth - ballSize) {
        newX = `${baseWidth * newLeft}`;
      }

      if (newTop >= (ballSize / 2) && newTop - (ballSize / 2) <= screenHeight - ballSize) {
        newY = `${baseHeight * newTop}`;
      }
      if ((lastTime - firstTime) < 200) return
      setPosition({ x: newX - (ballSize / 2), y: newY - (ballSize / 2) });
    };

    const handleMouseUp = (e) => {
      lastTime = new Date().getTime();
      document.removeEventListener('mousemove', handleMouseMove);
      document.removeEventListener('mouseup', handleMouseUp);
      document.removeEventListener('touchmove', handleMouseMove);
      document.removeEventListener('touchend', handleMouseUp);
    };

    document.addEventListener('mousemove', handleMouseMove);
    document.addEventListener('mouseup', handleMouseUp);
    document.addEventListener('touchmove', handleMouseMove);
    document.addEventListener('touchend', handleMouseUp);
  };

  return (
    <div
      ref={ballRef}
      className="floating-button"
      style={{ left: position.x + 'px', top: position.y + 'px' }}
      onMouseDown={handleMouseDown}
      onTouchStart={handleMouseDown}
      onClick={onClick}
    >
      <span></span>
      {(isShow) && <div className='custom-menu-box' style={{ left: positionChildern.x, top: positionChildern.y }}>
        {props.menuList && props.menuList.map((item, index) => (
          <div onClick={e => { menuClick(e, item.url) }} className={index == props.menuList.length - 1 ? 'custom-last-div' : ''}>{item.resourceName}<i className='operate-L1Arr-open'></i></div>
        ))}
      </div>}
    </div>
  );
};

export default FloatingBall;

在公共页面引入此组件，需要传入两个参数（menuList，isBallshow），我这个写的支持悬浮球点击 打开菜单，菜单的列表可跳转，鼠标拖拽和移动端触控都可以使用

不论哪个框架，拖拽的事件都差不多，自行修改就可以

css代码

* {
  box-sizing: border-box;
}

.floating-button {
  position: fixed;
  width: 64px;
  height: 64px;
  cursor: pointer;
  z-index: 1000;
  top: 50%;
  left: 50%;
  /* background-color: red; */
}

.floating-button span {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  background-image: url('../../assets/images/ball/button.gif');
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  z-index: 222;
}

.floating-button .custom-menu-box {
  width: 280px;
  /* height: 300px; */
  background-color: #0C2243;
  position: absolute;
  top: 60px;
  left: 60px;
  border-radius: 8px;
  border: 2px solid #379BE8;
  padding: 8px 24px 0 26px;
  color: #fff;
  font-size: 14px;
  letter-spacing: 1px;
  box-shadow: 0 4px 4px 0 rgba(255, 255, 255, 0.25) inset;
}

.floating-button .custom-menu-box>div {
  line-height: 42px;
  position: relative;
  cursor: pointer;
}

.floating-button .custom-menu-box>div::after {
  position: absolute;
  display: block;
  content: '';
  width: 100%;
  height: 1px;
  background: linear-gradient(to right, rgba(255, 255, 255,
    0.2), rgba(255, 255, 255, 0));
  top: 100%;
  left: 0;
}

.floating-button .custom-menu-box>.custom-last-div::after {
  background: transparent;
}

.floating-button .custom-menu-box .operate-L1Arr-open {
  width: 24px;
  height: 24px;
  position: absolute;
  right: 6px;
  top: 9px;
  background-image: url('../../assets/images/ball/gengduo1 2@2x.png');
  /* 图标路径 */
  background-size: cover;
  /* 图标适应尺寸 */
  background-repeat: no-repeat;
  /* 禁止重复 */

}