js实现掷骰子小游戏

时间:2020-05-17 senblingbling 人气:0

本文实例为大家分享了js掷骰子小游戏的具体代码，供大家参考，具体内容如下

因为这次作业是第一个实验，比较简单，但是要求面向对象来做，而我这个时候又刚好在学JS，JS来做骰子游戏即有前端了，又省了后台处理，代码量会比用JAVA来做少了非常非常多。考虑到这种实验实在不想浪费时间去用JAVA写，于是有了一下JS实现的版本。但是大家都知道JS的面向对象其实是伪面向对象。我感觉并不好用，因为用句柄的方式无法传值，你封装成对象了还得拆出来成为过程（单一方法）来用。

版本1： （没有用面向对象）

<!DOCTYPE>
<html>
 <head>
 <title>掷骰子游戏 author:SenDog</title>
 
 <meta charset="UTF-8">
  <script>
   var leftX = 150;
   var topY = 100;
   var diceX = 80;
   var diceY = 80;
   var dotR = 4;
   var count = 0;
   var lastNum = 0;
   var flag = false;
   
   function clickMe() {
    count = 0;
    if(flag) {
     return false;
    }
    flag = true;
    var ctx = document.getElementById("canvas").getContext('2d');
    ctx.beginPath();
 
    // ctx.strokeRect(leftX,topY,diceX,diceY);//绘制矩形 加粗
    //ctx.strokeRect(leftX+150,topY,diceX,diceY);
    setTimeout(function(){
     random(ctx);},200);
    
   }
   
   function drawDice(ctx,randomNum,randomNum2) {//绘制 骰子 123456的点数
    ctx.clearRect(leftX,topY,diceX,diceY);
     switch(randomNum) {
      case 1:
       draw1();
       break;
      case 2:
       draw2();
       break;
      case 3:
       draw3();
       break;
      case 4:
       draw4();
       break;
      case 5:
       draw5();
       break;
      case 6:
       draw6();
       break;
     }
 
 
    ctx.clearRect(leftX+150,topY,diceX,diceY);
    switch(randomNum2) {
     case 1:
      draw11();
       break;
     case 2:
      draw22();
       break;
     case 3:
      draw33();
      break;
     case 4:
      draw44();
      break;
     case 5:
      draw55();
      break;
     case 6:
      draw66();
      break;
    }
 
     count++;
     if(count>=20) {
      if(randomNum+randomNum2==7) {
       alert("骰子1："+randomNum+"，骰子2:"+randomNum2+"总和为7您赢了");
 
      }
      else {
      alert("骰子1："+randomNum+"；骰子2:"+randomNum2);
 
      }
      flag = false;
      return false;
     } else {
      setTimeout(function(){
       random(ctx);
      },200-count);
     }
   }
   
   function random(ctx) {//生成骰子点数，如果和上一步的点数相同重新生成点数，并绘制
    var randomNum = Math.floor(Math.random()*6)+1;
    var randomNum2 = Math.floor(Math.random()*6)+1;
    if(randomNum == lastNum) {
     random(ctx);
    } else {
     lastNum = randomNum;
     drawDice(ctx,randomNum,randomNum2);
 
    }
    
   }
   
   function commonDraw(ctx,dotX,dotY) {
    ctx.beginPath();
    ctx.arc(dotX,dotY,dotR,0,2*Math.PI,false);
 
    ctx.stroke();
    ctx.fill(); 
   }
 
 
 
   function draw1() {
    var ctx = document.getElementById("canvas").getContext('2d');
    ctx.fillStyle="#0000ff";
    var dotX = leftX+diceX/2;
    var dotY = topY+diceY/2;
    commonDraw(ctx,dotX,dotY);
   }
   
   function draw2() {
    var ctx = document.getElementById("canvas").getContext('2d');
    ctx.fillStyle="#99FF66";
    var dotX = leftX+4*dotR;
    var dotY = topY+4*dotR;
    commonDraw(ctx,dotX,dotY);
    var dotX = leftX+diceX-4*dotR;
    var dotY = topY+diceY-4*dotR;
    commonDraw(ctx,dotX,dotY);
   }
   
   function draw3() {
    draw1();
    draw2();
   }
   
   function draw4() {
    draw2();
    var ctx = document.getElementById("canvas").getContext('2d');
    ctx.fillStyle="#99CC00";
    var dotX = leftX+diceX-4*dotR;
    var dotY = topY+4*dotR;
    commonDraw(ctx,dotX,dotY);
    var dotX = leftX+4*dotR;
    var dotY = topY+diceY-4*dotR;
    commonDraw(ctx,dotX,dotY);
   }
   
   function draw5(){
    draw1();
    draw4();
   }
   function draw6(){
    var ctx = document.getElementById("canvas").getContext('2d');
    ctx.fillStyle="#996633";
    var dotX = leftX+4*dotR;
    var dotY = topY+diceY/2
    commonDraw(ctx,dotX,dotY);
    var dotX = leftX+diceY-4*dotR;
    commonDraw(ctx,dotX,dotY);
    draw4();
   }
 
 
 
   /* -------------骰子2----------------*/
   function draw11() {
    var ctx = document.getElementById("canvas").getContext('2d');
    ctx.fillStyle="#0000ff";
    var dotX = leftX+diceX/2+150;
    var dotY = topY+diceY/2;
    commonDraw(ctx,dotX,dotY);
   }
 
   function draw22() {
    var ctx = document.getElementById("canvas").getContext('2d');
    ctx.fillStyle="#99FF66";
    var dotX = leftX+4*dotR+150;
    var dotY = topY+4*dotR;
    commonDraw(ctx,dotX,dotY);
    var dotX = leftX+diceX-4*dotR+150;
    var dotY = topY+diceY-4*dotR;
    commonDraw(ctx,dotX,dotY);
   }
 
   function draw33() {
    draw11();
    draw22();
   }
   function draw44() {
    draw22();
    var ctx = document.getElementById("canvas").getContext('2d');
    ctx.fillStyle="#99CC00";
    var dotX = leftX+diceX-4*dotR+150;
    var dotY = topY+4*dotR;
    commonDraw(ctx,dotX,dotY);
    var dotX = leftX+4*dotR+150;
    var dotY = topY+diceY-4*dotR;
    commonDraw(ctx,dotX,dotY);
   }
   function draw55(){
    draw11();
    draw44();
   }
   function draw66(){
    var ctx = document.getElementById("canvas").getContext('2d');
    ctx.fillStyle="#996633";
    var dotX = leftX+150+4*dotR;
    var dotY = topY+diceY/2
    commonDraw(ctx,dotX,dotY);
    var dotX = leftX+150+diceY-4*dotR;
    commonDraw(ctx,dotX,dotY);
    draw44();
   }
   function init() {
    var ctx = document.getElementById("canvas").getContext('2d');
    ctx.beginPath();
    ctx.strokeRect(leftX,topY,diceX,diceY);//绘制灰色框框 第一个骰子
    ctx.strokeRect(leftX+150,topY,diceX,diceY);//第二个骰子的灰色框框
    ctx.stroke();
    draw6();
    draw66();
    
   }
  </script>
 </head>
 
 <body οnlοad="init();">
  <canvas id="canvas" width="600" height="300" style="background-color:#CCFFCC">
   your brower is not support html5
  </canvas>
 
  
  <input type="button" value="开始" οnclick="clickMe();"/>
 </body>
</html>

版本2，面向对象。但是JS真的很不适合面向对象，这只是伪装面向对象。

输入用户名后，会吧用户的姓名和摇出的点数和存入cookie中。 cookie只会保存对应用户最高的点数合。如果摇出更高的点数合，旧的就会被替换掉。通过查询按钮可以查询任意姓名的最高点数合记录。

<!DOCTYPE html>
 
<html>
<head lang="en">
 <meta charset="UTF-8">
 <title>author:senDog 掷骰子游戏</title>
</head>
<body>
请输入用户姓名：<input id="userName1" type="text" >
<button id="btn" > play </button>
查询用户最高成绩<button id="btn2" >查询 </button>
<script language="JavaScript" type="text/javascript">

 
 
 /*封装骰子类*/
 function shaizi(){
  var num = parseInt(1+Math.random()*5);
  return{
   "getNum":function(){
    return num;
   },
   "alertNum":function(){
    alert("骰子点数："+num);
   }
  };
 }
 
 var s1 = new shaizi();
 var s2 = new shaizi();
 
 var x = document.getElementById("btn");
 x.addEventListener("click",s1.alertNum);
 x.addEventListener("click",s2.alertNum);
 
 /*封装cookie类*/
 function cookie(){
 
  return{
   /*把总点数存入客户端浏览器cookie，并设置每次关闭浏览器cookie消失*/
   "addCookie":function(userName,num3){
    var str = userName + "=" + escape(num3);
    document.cookie = str;
    //alert("str:"+str);
   },
   "getCookie":function(userName){//获取指定名称的cookie的值
    var strCookie=document.cookie;
    var arrCookie=strCookie.split("; ");
    for(var i=0;i<arrCookie.length;i++){
     var arr=arrCookie[i].split("=");
     if(arr[0]==userName)return arr[1];
    }
    return "";
 
   }
   }
 
  }
 
 var ck = new cookie();
 /*记录用户最高总点数，存入cookie，然后可以通过查询用户名查出用户最高点数的记录*/
 function readName(){
  userName1 = document.getElementById("userName1").value;
 }
 function ckSet(){
  var num1=s1.getNum();
  var num2 = s2.getNum();
  num3 = num1+num2;
  var n = ck.getCookie(userName1);
  if(n!=null && n<num3) ck.addCookie(userName1,num3);
 }
 
 function ckGetName(){
  // var userName1 = document.getElementById("userName1").value;
  alert("username:"+userName1);
 }
 
 function ckGetNum(){
  //var userName1 = document.getElementById("userName1").value;
  var num=ck.getCookie(userName1);
  alert("用户最高总点数:"+num);
 }
 x.addEventListener("click",readName);
 x.addEventListener("click",ckSet);
 x.addEventListener("click",ckGetName);
 x.addEventListener("click",ckGetNum);
 
 var y = document.getElementById("btn2");
 y.addEventListener("click",readName);
 y.addEventListener("click",ckGetName);
 y.addEventListener("click",ckGetNum);
</script>
</body>
</html>

把代码复制到到TXT文档，后缀改为html即可运行。

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