用js实现拼图小游戏

本文实例为大家分享了js实现拼图小游戏的具体代码，供大家参考，具体内容如下

一、js拼图是什么？

用js做得小游戏

二、使用步骤

1、先创建div盒子

 <style>
    div,body{
      margin: 0;
      height: 0;
    }
    #box{
      width: 800px;
      height: 800px;
      background-color: burlywood;
      position: relative;
    }
    #box div {
      width: 200px;
      height: 200px;
      background: url(./imgs/bg.jpg) no-repeat;
      position: absolute;

    }

  </style>
</head>
<body>
  <div id="box"></div>
</body>

2.写js

<script>
  // 获取标签
  var box = document.getElementById("box");
  var arrs = [];
  // 循环创建16个对象，添加到数组中
  for(var i = 0; i < 4; i++){
    for(var j = 0; j < 4; j++){
      var divNode = document.createElement("div")
      divNode.style.top = 200 * i + "px"
      divNode.style.left = 200 * j + "px"

      // 创建对象
      var pox = {
        left: 200* i,
        top:200*j,
      }
      // 创建好的对象添加到数组里
      if( i !== 3 || j !== 3 ){
        arrs.push(pox)
      }else{
        divNode.style.background = "none";
        divNode.className = "space"
      }
      box.appendChild(divNode)
    }
  }
  console.log(arrs);

  // 随机抽取对象
  for(var i = 0; i < 15; i++){
    var ranNum = parseInt(Math.random() * (15 - i))
    var x = arrs[ranNum].left;
    var y = arrs[ranNum].top;

    box.children[i].style.backgroundPosition = - x + "px "+ - y + "px";
    arrs.splice(ranNum,1);
  }

  // 键盘事件
  document.onkeyup = function(event) {
    // 得到按的那个键
    var key = event.keyCode
    // 上
    if (key == 38) {

      var x = box.querySelector(".space").style.left
     var y = box.querySelector(".space").style.top
    for (var i = 0; i < 16; i++) {
      if (parseInt(box.children[i].style.top) == parseInt(y) - 200 && parseInt(box.children[i].style.left) == parseInt(x)) {
        box.children[i].style.top = y
        box.querySelector(".space").style.top = parseInt(y) - 200 + "px"
      }
    }
     
    // 下
    }else if (key == 40) {
      
      var x = box.querySelector(".space").style.left
      var y = box.querySelector(".space").style.top
      
      // 遍历所有小div，找到空白上面得那张 赋值 为y
      for(var i = 0; i < 16; i++){
        if (parseInt(box.children[i].style.top) == parseInt(y) + 200 && parseInt(box.children[i].style.left) == parseInt(x)) {
          box.children[i].style.top = y
        box.querySelector(".space").style.top = parseInt(y) + 200 + "px"
        }
      }

    // 左
    }else if (key = 38) {
      var x = box.querySelector(".space").style.left
     var y = box.querySelector(".space").style.top
    for (var i = 0; i < 16; i++) {
      if (parseInt(box.children[i].style.left) == parseInt(x) - 200 && parseInt(box.children[i].style.top) == parseInt(y)) {
        box.children[i].style.left = x
        box.querySelector(".space").style.left = parseInt(x) - 200 + "px"
      }
    }
     

    // 右 
    }else if (key = 39) {
      var x = box.querySelector(".space").style.left
     var y = box.querySelector(".space").style.top
    for (var i = 0; i < 16; i++) {
      if (parseInt(box.children[i].style.left) == parseInt(x) + 200 && parseInt(box.children[i].style.top) == parseInt(y)) {
        box.children[i].style.left = x
        box.querySelector(".space").style.left = parseInt(x) + 200 + "px"
      }
    }
    }

  }

</script>

效果图

用js实现拼图小游戏