貪吃蛇兒時的回憶，今天剛好學習到這了，就剛好做了一個，也是學習了吧，需要掌握的知識：
1、JS函數的熟練掌握，
2、JS數組的應用，
3、JS小部分AJAX的學習
4、JS中的splice、shift等一些函數的應用，
基本上就這些吧，下面提重點部分：
前端的頁面，這里可自行布局，我這邊提供一個我自己的布局：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>貪吃蛇</title> <link rel="stylesheet" type="text/css" href="./css.css"> <script type="text/javascript" src="./jquery-1.7.2.min.js"></script> <script type="text/javascript" src="./js.js"></script></head><body> <div id="info"> <div id="score">0</div> <form action="" id="form" name="form"> <input type="radio" name='time' value="500" checked='checked'/>簡單 <input type="radio" name='time' value="300"/>中等 <input type="radio" name='time' value="150"/>高級 <input type="radio" name='time' value="50"/>神速 <input type="button" value="開始" class="button" id="start"/> <input type="button" value="重玩" class="button" id="res"/> </form> </div> <div id="main"> <div id="home"> <!--<div style="background:url(./images/snake0.png) no-repeat;"></div> <div style="background:url(./images/snake1.png) no-repeat; left:20px;"></div> <div style="background:url(./images/snake2.png) no-repeat; left:40px;"></div> <div style="background:url(./images/snake3.png) no-repeat; left:60px;"></div>--> </div> <div class="wall left"></div> <div class="wall right"></div> <div class="wall top"></div> <div class="wall bottom"></div> </div> </body> </html>
這里是css代碼：
*{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.png) no-repeat; float: left; font-size: 14px; font-weight: 700; font-style:italic; font-family: '微軟雅黑';}#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; //用于判斷是否game over var food = []; var sorce = 0; //得分的顯示 首先要想有snake就必須創造snake，
for( var i=0; i<4; i++ ){ //var snakeDiv = document.createElement("div"); //snakeDiv.style = 'background:url(./images/snake' + i + '.png) no-repeat;'; var snakeDiv = $('<div style="background:url(./images/snake' + i + '.png) no-repeat;z-index:999"></div>'); home.append(snakeDiv); snakeArr[i] = {r : 10, c : 10 + i, div : snakeDiv, d : direcation}; setPosition(snakeArr[i]); } 有snake之后，自然就是移動了（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 'r' : snakeArr[0].c++; snakeArr[0].d = 'r'; break; case 't' : snakeArr[0].r--; snakeArr[0].d = 't'; break; case 'b' : snakeArr[0].r++; snakeArr[0].d = 'b'; break; } //snake的方向控制 $(window).keydown(function(event){ switch(event.keyCode){ case 37 : direcation = 'l'; break; case 38 : direcation = 't'; break; case 39 : direcation = 'r'; break; case 40 : direcation = 'b'; break; } }); //snake事故 //1. snake撞墻 if( snakeArr[0].c < 0 || snakeArr[0].r < 0 || snakeArr[0].c >= 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.png) no-repeat'}); snakeArr.splice(snakeArr.length - 1, 0, food[0]); food.shift(); sorce += 10; $('#score').html(sorce); } //snake產生水果 if( food.length == 0 ){ createFood(); } for(var i = 0; i < snakeArr.length; i++){ setPosition(snakeArr[i]); } },speed); } 食物的產生：
function createFood(){ var r = parseInt(rows * Math.random()); var c = parseInt(cols * Math.random()); var casrsh = false; //2個水果出現的位置不能一樣 while( food.length == 0 ){ //判斷snake的位置，不能與snake相撞 for( var i = 0; i < snakeArr.length; i++ ){ if( r == snakeArr[i].r && c == snakeArr[i].c ){ casrsh = true; } } //當位置不重疊的時候，產生水果 if( !casrsh ){ var i = parseInt(4 * Math.random()); var foodDiv = $('<div style="background:url(./images/fruit'+ i +'.png);"></div>'); home.append(foodDiv); food.push({r : r, c : c, div : foodDiv}); setPosition(food[0]); } } } 還有一個重要的功能就是重新設置定位：
function setPosition(obj){ obj.div.css({left : obj.c * 20, top : obj.r * 20}); obj.div.removeClass().addClass(obj.d); } createFood(); //那頁面一被加載出來就顯示出食物！ 希望本文所述對大家學習javascript程序設計有所幫助。
