web前端|js教程
JS,贪吃蛇,游戏
web前端-js教程
贪吃蛇儿时的回忆，今天刚好学习到这了，就刚好做了一个，也是学习了吧，需要掌握的知识：
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1、JS函数的熟练掌握，
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2、JS数组的应用，
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3、JS小部分AJAX的学习
4、JS中的splice、shift等一些函数的应用，
基本上就这些吧，下面提重点部分：
前端的页面，这里可自行布局，我这边提供一个我自己的布局：
0
简单中等高级神速
<!--
-->
这里是css代码：
*{padding: 0px; margin: 0px;font-size: 12px}body{background: #ccc}input.button{ width: 60px; cursor: pointer;}#info{ width: 540px; height: 30px; margin: 30px auto 5px; line-height: 30px;}#score{ width: 73px; height: 28px; padding-left: 64px; background: url(./images/score.jpg) no-repeat; float: left; font-size: 14px; font-weight: 700; font-style:italic; font-family: 微软雅黑;}#form{ float: right;}#form input{ vertical-align: middle; margin-right: 5px;}#main{ width: 540px; height: 500px; margin: 0 auto; position: relative; /*background: #71a000*/ }#main div{ width: 20px; height: 20px; position: absolute;}#main #home{ width: 500px; height: 460px; left: 20px; top: 20px; position: relative; background: url(./images/background.jpg) no-repeat;}#main #home div{ position: absolute;}#main div.wall{ width: 540px; height: 20px; background: url("./images/div.jpg") repeat-x; position: absolute;}#main div.top{ left:0px; top:0px;} #main div.bottom{ left:0px; top:480px;}#main div.left{ width: 20px; height: 500px; background: url(./images/div.jpg) repeat-y; left:0px; top:0px;}#main div.right{ width: 20px; height: 500px; background: url(./images/div.jpg) repeat-y; left:520px; top:0px;} .l{ -moz-transform:rotate(0deg); -o-transform:rotate(0deg); -webkit-transform:rotate(0deg); transform:rotate(0deg); /* IE8+ - must be on one line, unfortunately */ -ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=1, M12=0, M21=0, M22=1, SizingMethod=auto expand)";/* IE6 and 7 */ filter: progid:DXImageTransform.Microsoft.Matrix(M11=1,M12=0,M21=0,M22=1,SizingMethod=auto expand);}.t{ -moz-transform: rotate(90deg); -o-transform: rotate(90deg); -webkit-transform: rotate(90deg); transform:rotate(90deg); /* IE8+ - must be on one line, unfortunately */ -ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=-1.8369701987210297e-16, M12=-1, M21=1, M22=-1.8369701987210297e-16, SizingMethod=auto expand)"; /* IE6 and 7 */ filter: progid:DXImageTransform.Microsoft.Matrix(M11=-1.8369701987210297e-16,M12=-1,M21=1,M22=-1.8369701987210297e-16,SizingMethod=auto expand); }.r{ -moz-transform: rotate(180deg); -o-transform: rotate(180deg); -webkit-transform: rotate(180deg); transform:rotate(180deg); /* IE8+ - must be on one line, unfortunately */ -ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=-1, M12=1.2246467991473532e-16, M21=-1.2246467991473532e-16, M22=-1, SizingMethod=auto expand)"; /* IE6 and 7 */ filter: progid:DXImageTransform.Microsoft.Matrix(M11=-1,M12=1.2246467991473532e-16,M21=-1.2246467991473532e-16,M22=-1,SizingMethod=auto expand); }.b{ -moz-transform: rotate(270deg); -o-transform: rotate(270deg); -webkit-transform: rotate(270deg); transform:rotate(270deg); /* IE8+ - must be on one line, unfortunately */ -ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=6.123233995736766e-17, M12=1, M21=-1, M22=6.123233995736766e-17, SizingMethod=auto expand)"; /* IE6 and 7 */ filter: progid:DXImageTransform.Microsoft.Matrix(M11=6.123233995736766e-17,M12=1,M21=-1,M22=6.123233995736766e-17,SizingMethod=auto expand); }
JS公共文件
var home = $(#home); var snakeArr = []; var direcation = l; var speed = 0; var timer = \; //460/20 var rows = 23; var cols = 25; var die = false;//用于判断是否game over var food = []; var sorce = 0; //得分的显示
首先要想有snake就必须创造snake，
for( var i=0; i<4; i++ ){ //var snakeDiv = document.createElement("div"); //snakeDiv.style = ackground:url(./images/snake + i + .jpg) no-repeat;; var snakeDiv = $(
); home.append(snakeDiv); snakeArr[i] = {r : 10, c : 10 + i, div : snakeDiv, d : direcation}; setPosition(snakeArr[i]); }
有snake之后，自然就是移动了（move）：
function move(){ var timer = setInterval(function(){ for( var i=snakeArr.length -1; i>0; i-- ){snakeArr[i].c = snakeArr[i-1].c;snakeArr[i].r = snakeArr[i-1].r;snakeArr[i].d = snakeArr[i-1].d;} switch(direcation){case l : snakeArr[0].c--; snakeArr[0].d = l; break; case : snakeArr[0].c++; snakeArr[0].d = ; break; case : snakeArr[0].r--; snakeArr[0].d = ; break; case : snakeArr[0].r++; snakeArr[0].d = ; break; }//snake的方向控制 $(window).keydown(function(event){switch(event.keyCode){ case 37 :direcation = l;break; case 38 :direcation = ;break; case 39 :direcation = ;break; case 40 :direcation = ;break;} }); //snake事故//1. snake撞墙if( snakeArr[0].c < 0 || snakeArr[0].r = cols || snakeArr[0].r >= rows ){clearInterval(timer);die = true;alert(GAME OVER);} //2. snake撞到自己for( var i=1; i<snakeArr.length; i++ ){ if( snakeArr[0].c == snakeArr[i].c && snakeArr[0].r == snakeArr[i].r ){ clearInterval(timer); die = true; alert(GAME OVER); }} //snake吃水果if( snakeArr[0].c == food[0].c && snakeArr[0].r == food[0].r ){ food[0].div.css({background : url(./images/snake2.jpg) no-repeat}); snakeArr.splice(snakeArr.length - 1, 0, food[0]); food.shift(); sorce += 10; $(#score).html(sorce);} //snake产生水果if( food.length == 0 ){ createFood(); } for(var i = 0; i < snakeArr.length; i++){ setPosition(snakeArr[i]);} },speed); }
食物的产生：
function createFood(){ var r = parseInt(rows * Math.random()); var c = parseInt(cols * Math.random()); var casrsh = false; //2个水果出现的位置不能一样 while( food.length == 0 ){//判断snake的位置，不能与snake相撞for( var i = 0; i < snakeArr.length; i++ ){ if( r == snakeArr[i].r && c == snakeArr[i].c ){casrsh = true; }}//当位置不重叠的时候，产生水果if( !casrsh ){ var i = parseInt(4 * Math.random()); var foodDiv = $(
); home.append(foodDiv); food.push({r : r, c : c, div : foodDiv}); setPosition(food[0]);} } }
还有一个重要的功能就是重新设置定位：
function setPosition(obj){ obj.div.css({left : obj.c * 20, top : obj.r * 20});obj.div.removeClass().addClass(obj.d); } createFood(); //那页面一被加载出来就显示出食物！
