react实现一个贪吃蛇游戏代码-html代码-BFW代码库

代码语言：html

所属分类：游戏

代码描述：react实现一个贪吃蛇游戏代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en" >

<head>

  <meta charset="UTF-8">

  
  
  
<style>
.SnakeContainer {
  position:absolute;
  top:100px;
  left:100px;
    border: 1px solid black;
}
.SnakeHead, .SnakeBody {
    background-color: black;
    position: absolute;
    border-radius: 4px;
}
.Fruit {
    border: 2px solid black;
    box-sizing: border-box;
    position: absolute;
    border-radius: 2px;
}
</style>

  


</head>

<body>
  <div id="root"></div>
<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/babel.min.js"></script>
  <script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/react.production.16.13.js"></script>
<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/react-dom.production.16.13.js"></script>
      <script type="text/babel" >
      'use strict';

var _extends = Object.assign || function (target) {for (var i = 1; i < arguments.length; i++) {var source = arguments[i];for (var key in source) {if (Object.prototype.hasOwnProperty.call(source, key)) {target[key] = source[key];}}}return target;};

var _createClass = function () {function defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if ("value" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}return function (Constructor, protoProps, staticProps) {if (protoProps) defineProperties(Constructor.prototype, protoProps);if (staticProps) defineProperties(Constructor, staticProps);return Constructor;};}();

function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError("Cannot call a class as a function");}}

function _possibleConstructorReturn(self, call) {if (!self) {throw new ReferenceError("this hasn't been initialised - super() hasn't been called");}return call && (typeof call === "object" || typeof call === "function") ? call : self;}

function _inherits(subClass, superClass) {if (typeof superClass !== "function" && superClass !== null) {throw new TypeError("Super expression must either be null or a function, not " + typeof superClass);}subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } });if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;}

/* global document */
// var React = require('react');
// var PropTypes = require('prop-types');

function getInitialState() {
  return {
    x: null,
    y: null,
    swiping: false,
    start: 0 };

}

function getMovingPosition(e) {
  // If not a touch, determine point from mouse coordinates
  return 'changedTouches' in e ? { x: e.changedTouches[0].clientX, y: e.changedTouches[0].clientY } : { x: e.clientX, y: e.clientY };
}
function getPosition(e) {
  // If not a touch, determine point from mouse coordinates
  return 'touches' in e ? { x: e.touches[0].clientX, y: e.touches[0].clientY } : { x: e.clientX, y: e.clientY };
}

function calculatePos(e, state) {
  var _getMovingPosition = getMovingPosition(e),
  x = _getMovingPosition.x,
  y = _getMovingPosition.y;

  var deltaX = state.x - x;
  var deltaY = state.y - y;

  var absX = Math.abs(deltaX);
  var absY = Math.abs(deltaY);

  var time = Date.now() - state.start;
  var velocity = Math.sqrt(absX * absX + absY * absY) / time;

  return { deltaX: deltaX, deltaY: deltaY, absX: absX, absY: absY, velocity: velocity };
}

var Swipeable = function (_React$Component) {
  _inherits(Swipeable, _React$Component);

  function Swipeable(props, context) {
    _classCallCheck(this, Swipeable);

    var _this = _possibleConstructorReturn(this, (Swipeable.__proto__ || Object.getPrototypeOf(Swipeable)).call(this, props, context));

    _this.eventStart = _this.eventStart.bind(_this);
    _this.eventMove = _this.eventMove.bind(_this);
    _this.eventEnd = _this.eventEnd.bind(_this);
    _this.mouseDown = _this.mouseDown.bind(_this);
    _this.mouseMove = _this.mouseMove.bind(_this);
    _this.mouseUp = _this.mouseUp.bind(_this);
    _this.cleanupMouseListeners = _this.cleanupMouseListeners.bind(_this);
    _this.setupMouseListeners = _this.setupMouseListeners.bind(_this);
    return _this;
  }

  _createClass(Swipeable, [{
    key: 'componentWillMount',
    value: function componentWillMount() {
      // setup internal swipeable state
      this.swipeable = getInitialState();
    } },
  {
    key: 'componentDidUpdate',
    value: function componentDidUpdate(prevProps) {
      // swipeable toggled either on/off, so stop tracking swipes and clean up
      if (prevProps.disabled !== this.props.disabled) {
        this.cleanupMouseListeners();
        // reset internal swipeable state
        this.swipeable = getInitialState();
      }
    } },
  {
    key: 'componentWillUnmount',
    value: function componentWillUnmount() {
      this.cleanupMouseListeners();
    } },
  {
    key: 'setupMouseListeners',
    value: function setupMouseListeners() {
      document.addEventListener('mousemove', this.mouseMove);
      document.addEventListener('mouseup', this.mouseUp);
    } },
  {
    key: 'cleanupMouseListeners',
    value: function cleanupMouseListeners() {
      // safe to call, if no match is found has no effect
      document.removeEventListener('mousemove', this.mouseMove);
      document.removeEventListener('mouseup', this.mouseUp);
    } },
  {
    key: 'mouseDown',
    value: function mouseDown(e) {
      if (!this.props.trackMouse || e.type !== 'mousedown') {
        return;
      }
      // allow 'orig' props.onMouseDown to fire also
      // eslint-disable-next-line react/prop-types
      if (typeof this.props.onMouseDown === 'function') this.props.onMouseDown(e);

      // setup document listeners to track mouse movement outside <Swipeable>'s area
      this.setupMouseListeners();

      this.eventStart(e);
    } },
  {
    key: 'mouseMove',
    value: function mouseMove(e) {
      this.eventMove(e);
    } },
  {
    key: 'mouseUp',
    value: function mouseUp(e) {
      this.cleanupMouseListeners();
      this.eventEnd(e);
    } },
  {
  .........完整代码请登录后点击上方下载按钮下载查看