砸砖块小游戏

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写个小游戏

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<html>
<head lang='en'>
  <meta charset='UTF-8'>
  <title></title>
  <style>
    *{margin:0;padding:0;}
    li{list-style:none}
    #outer{padding:20px 30px 40px;background:#ccc;margin:0 auto;width:400px;box-shadow:2px 2px 2px 0 #aaa;border-radius:10px;margin-top:20px}
    #container{height:350px;width:400px;background:#efe;position:relative;overflow:hidden;}
    #ball{width:20px;height:20px;background:#f00;border-radius:10px;display:block;position:absolute;top:327px;left:195px;}
    #board{width:100px;height:3px;position:absolute;top:347px;background:#069;left:150px;}
    #btn{display:block;margin:20px auto;width:100px;height:40px;}
    .opera{width:290px;margin:0 auto;}
    .opera button{height:30px;width:100px;margin:20px;}
    #show{display:block;height:350px;width:400px;line-height:350px;font-size:50px;font-weight:bold;text-align:center;position:absolute;top:-350px;transition:all 2s;}
    #toper{width:400px;height:40px;}
    #sore{font-size:20px;font-weight:bold;float:left}
    #rule{position:fixed;right:200px;width:200px;background:#000;color:#fff;display:none}
    ul{width:400px;height:350px;}
    li{box-sizing:border-box;border:1px solid #fff;height:20px;width:40px;background:#0f0;position:absolute;}
  </style>
</head>
<body>
<div id='rule'>
  游戏规则
  <br/>
  用挡板接住小球，接不住游戏失败
</div>
<div id='outer'>
  <div id='toper'>
    <span id='sore'>当前分数</span>
  </div>

  <div id='container'>
    <ul>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
      <li></li>
    </ul>
    <span id='ball'></span>
    <div id='board'></div>
    <span id='show'></span>
  </div>
  <button id='btn'>开始</button>
</div>
<div class='opera'>
  <button id='zuo'>向左</button>
  <button id='you'>向右</button>
</div>
</body>
<script>
  //获取标签
  var con = document.getElementById('container');
  var show = document.getElementById('show');
  var board = document.getElementById('board');
  var ball = document.getElementById('ball');
  var sore = document.getElementById('sore');
  //将砖块平铺到游戏区域上边
  //获取所有的砖块
  var _li = document.getElementsByTagName('li');
  var _left = 0;
  var _lefti = 0;
  var _top = 0;
  var _col = Math.floor(con.offsetWidth / _li[0].offsetWidth);
  for(var i = 0;i < _li.length;i++) {
    var n1 = parseInt(Math.random() * 255);
    var n2 = parseInt(Math.random() * 255);
    var n3 = parseInt(Math.random() * 255);
    var n4 = Math.random();
    _li[i].style.backgroundColor = 'rgba(' + n1 + ',' + n2 + ',' + n3 + ','  + n4 + ')';
    _left = _lefti * _li[0].offsetWidth;
    _li[i].style.left = _left + 'px';
    _li[i].style.top = _top + 'px';
    _lefti ++;
    if((i + 1) % _col == 0 && i != 0){
      _top += _li[i].offsetHeight;
      _lefti = 0;
    }
  }
  var t = 0;
  //设置游戏的函数
  var playGame = function(){
    var ran = Math.random() * con.offsetWidth;
    //重置数据
    var s = 0;
    var m = 1;
    var n = -1;
    ball.style.top = 327 + 'px';
    ball.style.left = ran + 'px';
    show.textContent = 'Start Game';
    show.style.top = -350 + 'px';
    sore.textContent = '你当前的分数为：0';
    sore.style.color = '#000';
    //小球运动的函数
    var time = setInterval(function(){
      ball.style.left = ball.offsetLeft  + m + 'px';
      ball.style.top = ball.offsetTop  + n + 'px';
      //判断边界
      if(ball.offsetLeft + ball.offsetWidth >= con.offsetWidth){
        m = -1;
      }
      if(ball.offsetTop <= 0){
        n = 1;
      }
      if(ball.offsetLeft <= 0){
        m = 1;
      }
      if(ball.offsetTop + ball.offsetHeight >= con.offsetHeight){
        clearInterval(time);
        show.innerHTML = 'Game Over';
        show.style.top = 0;
        sore.style.color = '#f00';
      }
      for(var i = 0 ;i <  _li.length;i ++){
        //下边届
        if(ball.offsetTop == _li[i].offsetHeight + _li[i].offsetTop && (ball.offsetLeft >= _li[i].offsetLeft) && ball.offsetLeft <= _li[i].offsetLeft + _li[i].offsetWidth){
          _li[i].style.display = 'none';
          n = 1;
          t++
        }
        //上边界
        if(ball.offsetTop ==_li[i].offsetTop && (ball.offsetLeft >= _li[i].offsetLeft) && ball.offsetLeft <= _li[i].offsetLeft + _li[i].offsetWidth){
          _li[i].style.display = 'none';
          n = -1;
          t++;
          sore.textContent = '小球弹起：' + s + '次，剩余砖块：' + (_li.length - t);
        }
        //左边界
        if(ball.offsetLeft ==_li[i].offsetLeft && (ball.offsetTop >= _li[i].offsetTop) && ball.offsetTop <= _li[i].offsetTop + _li[i].offsetWidth){
          _li[i].style.display = 'none';
          m = -1;
          t++;
          sore.textContent = '小球弹起：' + s + '次，剩余砖块：' + (_li.length - t);
        }
        //右边界
        if(ball.offsetLeft ==_li[i].offsetLeft + _li[i].offsetWidth&& (ball.offsetTop >= _li[i].offsetTop) && ball.offsetTop <= _li[i].offsetTop + _li[i].offsetWidth){
          _li[i].style.display = 'none';
          m = 1;
          t++;
          sore.textContent = '小球弹起：' + s + '次，剩余砖块：' + (_li.length - t);
        }
      }
      if(ball.offsetTop + ball.offsetHeight >= con.offsetHeight - board.offsetHeight && (ball.offsetLeft > board.offsetLeft && ball.offsetLeft < board.offsetLeft + board.offsetWidth)){
        n = -1;
        s += 1;
        sore.textContent = '小球弹起：' + s + '次，剩余砖块：' + (_li.length - t);
      }
      if(t - _li.length == 0){
        sore.textContent = '小球弹起：' + s + '次，剩余砖块：' + (_li.length - t);
        clearInterval(time);
        show.innerHTML = 'Success';
        show.style.top = 0;
        sore.style.color = '#f00';
      }
    },1);
  };
  //调用开始游戏
  document.onkeyup =function(e){
    e = e || window.event;
    if(e.keyCode == 13  ){
      playGame();
    }
  };
  btn.onclick = function(){
    playGame();
  };
  //挡板运动
  //向左运动的函数
  function boardLeft(){
    board.style.left = board.offsetLeft - 30 + 'px';
    if(board.offsetLeft <= 0){
      board.style.left = 0;
    }
  }
  //向右运动的函数
  function boardRight(){
    board.style.left = board.offsetLeft + 30 + 'px';
    if(board.offsetLeft  + board.offsetWidth >= con.offsetWidth){
      board.style.left = con.offsetWidth - board.offsetWidth + 'px'
    }
  }
  zuo.onclick = function(){
    boardLeft()
  };
  you.onclick = function(){
    boardRight()
  };
  document.onkeydown = function(e){
    e = e || window.event;
    if(e.keyCode == 37){
      setInterval(boardLeft(),50)
    }
    if(e.keyCode == 39){
      setInterval(boardRight(),50)
    }
  };
</script>
</html>