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  • JavaScript游戏——五子棋

    最近半个月一直在看深入的学习JavaScript,里面有很多重点和难点,比如闭包、词法分析、面向对象等。今天给大家分享一个由JavaScript编写的五子棋游戏,主要用到JavaScript的面向对象、事件委托、闭包等知识,还是挺有分量的,正好可以检测学习的成果。

    老规矩,先上图,再说话。

    效果图:

    这里写图片描述

    五子棋素材图:

    这里写图片描述

    代码:

    <!DOCTYPE html>
    <html>
    <head>
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <title>HTML五子棋游戏</title>
        <link rel="stylesheet" href="">
        <script>
    
            //五子棋的构造函数
            function Game(){
                this.isWin = false;//游戏是否结束标志
            }
    
            //闭包计棋器
            Game.cnt = (function(){
                var curr = 'black';
                return function(){
                    var tmp = curr;
                    if(curr == 'black'){
                        curr = 'white';
                    }else{
                        curr = 'black';
                    }
                    return tmp;
                }
            })();
    
            //下棋函数
            Game.xiaQi = function(g){
                //判断选择的位置是否已经下过棋了
                if(this.style.backgroundImage.indexOf('gif') >= 0){
                    alert('这里已经下过棋了');
                    return ;
                }
                var color = Game.cnt();
                this.style.backgroundImage = "url(./images/"+color+".gif)";
    
                Game.judge.call(this,color,g);//判定函数
            }
    
            //判定游戏是否结束
            Game.judge = function(color,g){
                var tds = document.getElementsByTagName('td');
                //获取当前棋子所下的位置
                var curr = {x:this.cellIndex,y:this.parentElement.rowIndex,color:color};
                var line = ['','','',''];//表示当前棋子的横、竖、左斜、右斜方向的棋子
    
                //遍历255个棋格,看看是否能赢
                for(var i=0,tmp={};i<tds.length;i++){
                    tmp = {x:tds[i].cellIndex,y:tds[i].parentElement.rowIndex,color:'0'};
                    if(tds[i].style.backgroundImage.indexOf('black') >= 0){
                        tmp.color = 'b';
                    }else if(tds[i].style.backgroundImage.indexOf('white') >= 0){
                        tmp.color = 'w';
                    }
                    //获取当前棋子的横向其他棋子的坐落情况
                    if(curr.y == tmp.y){
                        line[0] += tmp.color;
                    }
                    //获取当前棋子的竖向其他棋子的坐落情况
                    if(curr.x == tmp.x){
                        line[1] += tmp.color;
                    }
                    //获取当前棋子的左斜方向其他棋子的坐落情况
                    if(curr.x+curr.y == tmp.x+tmp.y){
                        line[2] += tmp.color;
                    }
                    //获取当前棋子的右斜方向其他棋子的坐落情况
                    if(curr.x-tmp.x == curr.y-tmp.y){
                        line[3] += tmp.color;
                    }
                }
                color = color == 'black'?'bbbbb':'wwwww';
                //判断是否五子连珠
                for(var i=0;i<line.length;i++){
                    if(line[i].indexOf(color) >=0){
                        alert('你赢了');
                        g.isWin = true;
                        break;
                    }
                }
            }   
    
            //页面加载完成
            window.onload = function(){
                var g = new Game();
                document.getElementsByTagName('table')[0].onclick = function(ev){
                    //判断是否已经赢得游戏
                    if(g.isWin){
                        alert('此局已结束,请重新开始');
                        return;
                    }
                    Game.xiaQi.call(ev.srcElement,g);//下棋
                }
    
            }
    
    
    
    
        </script>
    </head>
    <style>
        table{
        border-collapse:collapse;   
        width:540px;
        height:540px;
        border:solid 1px blue;
        margin:auto;
        background-image: url('./images/background.gif');
    }
    </style>
    <body>
    <table>
        <tr>
            <td>&nbsp;</td>
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    </body>
    </html>

    今天不知道怎么搞的,写博客的时候上传不了图片,还好我机智,把图片存到GitHub上,好了,来讲代码。首先,我必须先说明一下,我觉得代码还有很大的优化空间,感兴趣的同学可以继续研究。

    实现思路:首先创建一个表格,共15行,15列,把背景改成棋盘的图片,给这个table添加onclick事件,这里使用到了事件委托,事件委托我在之前的文章有介绍过,感兴趣的同学可以去看看。去调用xiaQi函数,在下棋函数中,先判断选择的位置是否已经下过棋了,使用闭包获取下一个棋子的颜色,然后调用judge函数,在函数中先获取当前棋子所下的位置,遍历255个棋格,看看是否能赢,判断是否五子连珠,如果有则游戏结束。

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  • 原文地址:https://www.cnblogs.com/cnsec/p/13407052.html
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