原生JS实现的跳一跳小游戏完整实例

程序员文章站 2023-11-05 13:44:22

本文实例讲述了原生js实现的跳一跳小游戏。分享给大家供大家参考，具体如下：以下说的是闲暇编写的一个小游戏--跳一跳，类似于微信的跳一跳，大体实现功能有： 1.先随机生...

本文实例讲述了原生js实现的跳一跳小游戏。分享给大家供大家参考，具体如下：

以下说的是闲暇编写的一个小游戏--跳一跳，类似于微信的跳一跳，大体实现功能有：

1.先随机生成地图；

2.按住按钮释放后完成动作并进行判断；

首先po一下代码；

代码如下：

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="x-ua-compatible" content="ie=edge">
  <title>跳一跳</title>
  <style>
    *{padding: 0;margin: 0;}
    .game{
      position: relative;
      width: 800px;
      height: 400px;
      border: 1px solid black;
      margin: 0 auto;
    }
    .game .content{
      position: absolute;
      width: 700px;
      height: 400px;
      left: 0;
      top: 0;
    }
    .game #chess{
      position: absolute;
      width: 40px;
      height: 48px;
      overflow: hidden;
      z-index:99;
      transition-property: all;
    }
    .cylinder{
      position: relative;
      width: 70px;
      height: 101px;
      float: left;
    }
    .cylinder .top{
      position: absolute;
      width: 70px;
      height: 35px;
      border-radius: 50%;
      background: yellow;
      z-index: 4;
    } 
    .cylinder .front{
      position: absolute;
      width: 70px;
      height: 70px;
      background: black;
      margin-top: 17px;
      z-index: 3;
    }
    .cylinder .bottom{
      position: absolute;
      width: 70px;
      height: 35px;
      border-radius: 50%;
      background: black;
      margin-top: 65px;
      z-index: 4;
    }
    button{
      position: absolute;
      width: 80px;
      height: 30px;
      font-size: 16px;
      text-align: center;
      line-height: 30px;
      border-radius: 20%;
      bottom: 10px;
      right: 10px;
    }
    .move{
      animation-name: jump;
    }
    /* 跳棋运动动画 */
    @keyframes jump{
      0%{transform: rotate(0deg);}
      10%{transform: rotate(36deg);}
      20%{transform: rotate(72deg);}
      30%{transform: rotate(108deg);}
      40%{transform: rotate(144deg);}
      50%{transform: rotate(180deg);}
      60%{transform: rotate(216deg);}
      70%{transform: rotate(252deg);}
      80%{transform: rotate(288deg);}
      90%{transform: rotate(324deg);}
      100%{transform: rotate(360deg);}
    }
    @-webkit-keyframes jump{
      0%{transform: rotate(0deg);}
      10%{transform: rotate(36deg);}
      20%{transform: rotate(72deg);}
      30%{transform: rotate(108deg);}
      40%{transform: rotate(144deg);}
      50%{transform: rotate(180deg);}
      60%{transform: rotate(216deg);}
      70%{transform: rotate(252deg);}
      80%{transform: rotate(288deg);}
      90%{transform: rotate(324deg);}
      100%{transform: rotate(360deg);}
    }
    @-o-keyframes jump{
      0%{transform: rotate(0deg);}
      10%{transform: rotate(36deg);}
      20%{transform: rotate(72deg);}
      30%{transform: rotate(108deg);}
      40%{transform: rotate(144deg);}
      50%{transform: rotate(180deg);}
      60%{transform: rotate(216deg);}
      70%{transform: rotate(252deg);}
      80%{transform: rotate(288deg);}
      90%{transform: rotate(324deg);}
      100%{transform: rotate(360deg);}
    }
    @-moz-keyframes jump{
      0%{transform: rotate(0deg);}
      10%{transform: rotate(36deg);}
      20%{transform: rotate(72deg);}
      30%{transform: rotate(108deg);}
      40%{transform: rotate(144deg);}
      50%{transform: rotate(180deg);}
      60%{transform: rotate(216deg);}
      70%{transform: rotate(252deg);}
      80%{transform: rotate(288deg);}
      90%{transform: rotate(324deg);}
      100%{transform: rotate(360deg);}
    }
  </style>
</head>
<body>
  <div class="game">
    <div class="content">
      <!-- 圆柱体 -->
      <div class="cylinder">
        <!-- 顶部 -->
        <div class="top"></div>
        <!-- 前面 -->
        <div class="front"></div>
        <!-- 底部 -->
        <div class="bottom"></div>
      </div>
    </div>
    <!-- 跳棋 -->
    <div id="chess">
      <div style="width:20px;height:20px;border-radius:50%;background:red;position:absolute;margin-left:13px;z-index: 100;"></div>
      <div style="width:40px;height:40px;background:blue;overflow: hidden;margin-top: 32px;transform:rotate(67deg) skewx(40deg);">
      </div>
    </div>
    <button id="play">按住它</button>
  </div>
</body>
<script>
  var time = 0,score = 0,prev = 1;
  var cylinders = document.getelementsbyclassname('cylinder');
  var chess = document.getelementbyid('chess');
  var arrleft = [10,20,30,50];
  var arrtop = [210,290];
  // 初始函数，入口函数
  function init(){
    draw();
    bindevent();
  };
  // 生成地图
  function draw(){
    var str = '';
    for(var n = 0; n < 7; n++){
      str +="<div class='cylinder'><div class='top'></div><div class='front'></div><div class='bottom'></div></div >"
    }
    document.getelementsbyclassname('content')[0].innerhtml = str;
    for(var m = 0; m < 7; m++){
      var left = arrleft[math.floor(math.random() *arrleft.length)];
      var top = arrtop[math.floor(math.random() * arrtop.length)];
      cylinders[m].style.marginleft = left + 'px';
      cylinders[m].style.margintop = top + 'px';
    }
    // 画棋子
    chess.style.margintop = cylinders[0].offsettop - 25 + 'px';
    chess.style.marginleft = cylinders[0].offsetleft + 13 + 'px';
  }
  // 绑定事件函数
  function bindevent(){
    document.getelementbyid('play').onmousedown = function () {
      var timer = setinterval(function () {
        time++;
      }, 100);
      document.getelementbyid('play').onmouseup = function () {
        clearinterval(timer);
        chess.classlist.add('move');
        chess.style.animationduration = time * 0.1 + 's';
        chess.style.transitionduration = time * 0.1 + 's';
        if (cylinders[prev - 1].offsettop > cylinders[prev].offsettop) {
          var dx = settran(prev - 1,prev);
          chess.style.marginleft = chess.offsetleft + time * 15 + 'px';
          chess.style.margintop = chess.offsettop + time * 15 * dx + 'px';
        } else if (cylinders[prev - 1].offsettop < cylinders[prev].offsettop) {
          var dy = settran(prev - 1, prev);
          chess.style.marginleft = chess.offsetleft + time * 15 + 'px';
          chess.style.margintop = chess.offsettop + time * 15 * dy + 'px';
        }else if(cylinders[prev - 1].offsettop == cylinders[prev].offsettop){
          chess.style.margintop = chess.offsettop + 'px';
          chess.style.marginleft = chess.offsetleft + time * 15 + 'px';
        }
        chess.addeventlistener(gettransition(), function () {
          chess.classlist.remove('move');
          time = 0;
          judeg();
          chess.removeeventlistener(gettransition(), arguments.callee, false);
        }, false);
      };
    };
  };
  // top和left移动的比例
  function settran(prev,next) {
    var d_top = cylinders[prev].offsettop - cylinders[next].offsettop;
    var d_left = cylinders[prev].offsetleft - cylinders[next].offsetleft;
    return d_top/d_left;
  }
  // 判断动画是否结束
  function gettransition() {
    var t;
    var transitions = {
      'transition': 'transitionend',
      'otransition': 'otransitionend',
      'moztransition': 'transitionend',
      'webkittransition': 'webkittransitionend'
    };
    for (t in transitions) {
      if (chess.style[t] !== undefined) {
        return transitions[t];
      }
    }
  };
  // 判断是否跳出边界
  function judeg() {
    for(; prev < cylinders.length;){
      // 判断条件
      var e_left = chess.offsetleft > cylinders[prev].offsetleft -20 && chess.offsetleft < cylinders[prev].offsetleft + 90;
      var e_top = chess.offsettop + 48 > cylinders[prev].offsettop && chess.offsettop + 48 < cylinders[prev].offsettop + 35;
      if( e_left && e_top ){
        score++;
        if(prev >= cylinders.length){
          prev = 1;
        }else{
          prev++;
        }
        break;
      }else{
        alert('you lost');
        break;
      }
    }
  }
  init();
</script>
</html>

代码主要分为用来绘制圆柱体分布的draw()函数，用来绑定按钮事件的bindevent()函数，用来监听css3动画是否结束的gettransition()函数，用来判断棋子是否出界的函数judeg()函数。而控制棋子运动的距离，主要是通过当你按下按钮时(onmousedown)触发一个定时器函数中的(time的加加)，弹起按钮时(onmouseup)棋子的left和top运动距离=设定像素值*time。

为了让棋子运动不那么生硬我添加了一些css3动画（rotate属性）以及transition属性。

实现效果如下：

原生JS实现的跳一跳小游戏完整实例