js编写“贪吃蛇”的小游戏_javascript技巧

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：

　　1、JS函数的熟练掌握，

　　2、JS数组的应用，

　　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：

                     

  
  
    
    

      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.png) 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

'); home.append(snakeDiv); snakeArr[i] = {r : 10, c : 10 + i, div : snakeDiv, d : direcation}; setPosition(snakeArr[i]); }