这篇文章主要讲解了“怎么使用js编写实现拼图游戏”，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习“怎么使用js编写实现拼图游戏”吧！
目标
使用原生js编写一个拼图游戏，我这里写了两种拼图的方法。一种是拖拽拼图，一种是经典的九宫格拼图，可以自定义参数设置游戏难度
先看看截图效果
拖拽模式（拖拽图片切换图片）
点击模式（点击图片与空白区域切换位置）
不多说，直接上代码
css
#canvasBox{ margin: 0 auto; position: fixed; border: 2px solid #f00; overflow: hidden; } .item{ display: inline-block; border: 1px solid #f00; position: absolute; top: 0; left: 0; transition: 0.1s; }html
<div > <button onclick="setGame('block', 'none')">拖拽模式</button> <button onclick="setGame('none', 'block')" >点击模式</button> </div> <div id="canvasBox"></div><div id="canvasBox2"></div>javascript
function JigsawGame(obj){ // 初始化容器 this.Id = document.getElementById(obj.Id); // 初始化图片 this.img = new Image(); this.img.src = obj.imgUrl; // 容器最大宽度 this.windowWidth = document.body.clientWidth; this.maxWidth = this.windowWidth > 750 ? 750 : (this.windowWidth * 0.9); // 设置容器宽高 this.Id.style.width = this.maxWidth + "px"; this.Id.style.height = this.maxWidth + "px"; this.Id.style.left = (this.windowWidth - this.maxWidth)/2 + "px"; this.Id.style.top = 50 + "px"; // 获取容器范围 this.boxOffsetY = parseFloat(this.Id.style.top); this.boxOffsetX = parseFloat( this.Id.style.left); // 关卡（简单：1 || 普通：2 || 困难：3） if(obj.level == 1 || obj.level == 2 || obj.level == 3 ){ this.Level = obj.level; }else{ this.level = 1; } // 难度 var diffArr = [3, 4, 5]; this.Diff= diffArr[this.Level-1]; // canvas宽高 this.cW = this.maxWidth/ this.Diff; this.cH = this.maxWidth/ this.Diff; // 记录的小方块个数 this.number = 0; // 正确的数组 this.numberArr = []; // 存储小方块的中心点坐标 this.centerXY = []; this.gameType = obj.gameType || 1; // 记录最后一个元素的标记 this.lastElement = { sign: 0, left: 0, top: 0, Id: obj.Id + 1 }; // 初始化 this.Init(); } JigsawGame.prototype = { Init: function(){ var that = this; this.img.onload = function(){ // 格子宽高 var LevelW = that.img.width/that.Diff; var LevelH = that.img.height/that.Diff; for(var i = 0 ; i < that.Diff; i++){ for(var j = 0 ; j < that.Diff; j++){ // 初始化小方块 that.initCube(i, j, LevelW, LevelH); } } // 打乱小方块 that.upsetElement(); // 游戏类型判断 if(that.gameType == 1){ // 监听拖动 that.Id.addEventListener("mousedown",function(event){ that.mouseDown(event); }, false); }else{ // 获取空白小方块坐标 that.getLastElement(); // 监听点击 that.Id.addEventListener("click",function(event){ that.mouseClick(event); }, false); } } }, initCube: function(i, j, LevelW, LevelH){ // 创建一个小方块 var item = document.createElement("div"), cW = this.cW, cH = this.cH; item.className = "item"; item.setAttribute("data-index", this.number); item.style.width = cW + "px"; item.style.height = cH + "px"; item.style.left = i * cW + "px"; item.style.top = j * cH + "px"; item.innerHTML = "<canvas class='' width='"+ cW +"' height='"+ cH +"'></canvas>"; this.Id.appendChild(item); var canvas = item.querySelector("canvas"); var ctx = canvas.getContext("2d"); if(this.gameType != 1 && j == this.Diff-1 && i == this.Diff-1){ this.lastElement.sign = this.number; item.id = this.lastElement.Id; }else{ ctx.drawImage(this.img, i * LevelW, j * LevelH , LevelW, LevelH, 0 , 0, cW, cH) } // 每添加一个就压入一次到数组 this.numberArr.push({ x: i*cW +"px" , y: j*cH +"px" }); this.number++; // 压入初始中心点 this.centerXY.push({ x: i*cW + cW / 2, y: j*cH + cH / 2 }); }, mouseDown: function(event){ console.log(event) var event = event || window.event; var that = this; var target = event.target || event.srcElement; // 保证拖动的是想要的元素 if( target.parentElement.className.toLowerCase() == "item"){ var Element = target.parentElement; // 存储当前元素的top,left var thisTop = parseFloat( Element.style.top ); var thisLeft = parseFloat( Element.style.left ); // 获取当前点击的位置 var pageX = event.pageX; var pageY = event.pageY; // 拖动 document.onmousemove = function(e){ console.log(e) that.mouseMove(e, Element, thisTop, thisLeft, pageY, pageX); return false; } // 松开 document.onmouseup = function(e){ that.mouseUp(e, Element, thisTop, thisLeft) // 释放拖拽 document.onmousemove = null; document.onmouseup = null; return false; } } return false; }, mouseMove: function(e, Element, thisTop, thisLeft, pageY, pageX){ var pageX2 = e.pageX; var pageY2 = e.pageY; Element.style.top = thisTop + (pageY2 - pageY) + "px"; Element.style.left = thisLeft + (pageX2 - pageX) + "px"; Element.style.zIndex = 1000; }, mouseUp: function(e, Element, thisTop, thisLeft){ var that = this, cW = this.cW, cH = this.cH; // 检测当前拖动替换目标 var moveCenterX = parseFloat(Element.style.left) + cW / 2; var moveCenterY = parseFloat(Element.style.top) + cH / 2; var changeElementIndex = this.checkChangeElement(moveCenterX, moveCenterY); var changeElement = this.Id.getElementsByClassName("item")[changeElementIndex]; // 限制拖拽范围 // 当松开的坐标xy在容器范围内 if( e.pageX < this.boxOffsetX || e.pageX > (this.boxOffsetX + this.maxWidth) || e.pageY < this.boxOffsetY || e.pageY > (this.boxOffsetY + this.maxWidth) ){ console.log("释放") Element.style.top = thisTop + "px"; Element.style.left = thisLeft + "px"; }else{ // 判断当前元素是否离开了自己的格子 if( Element.getAttribute("data-index") == changeElement.getAttribute("data-index")){ Element.style.top = thisTop + "px"; Element.style.left = thisLeft + "px"; }else{ // 进行替换 Element.style.top = changeElement.style.top ; Element.style.left = changeElement.style.left ; changeElement.style.top = thisTop + "px"; changeElement.style.left = thisLeft + "px"; changeElement.style.zIndex = 1000; // 更新小方块中心点 this.updateElement(); } } // 消除层级问题 setTimeout(function(){ Element.style.zIndex = 0; changeElement.style.zIndex = 0; if(that.compareArray()){ alert("恭喜你，拼图成功！"); } }, 150); // 判断拼图完成 console.log(this.compareArray()) console.log(this.numberArr) }, checkChangeElement: function(moveLeft, moveTop){ // 最小距离 var minDistance = null; // 最小距离替换目标 var minIndex = null; for(var i = 0 ; i < this.centerXY.length; i++){ var x = Math.abs( moveLeft - this.centerXY[i].x ); var y= Math.abs( moveTop - this.centerXY[i].y ); var val = Math.ceil(Math.sqrt( x * x + y * y)); // 初次判断 if(minDistance == null){ minDistance = val; minIndex = i; } // 后续判断 if(minDistance > val){ minDistance = val; minIndex = i; } } // 返回目标对象下标 return minIndex; }, updateElement: function(){ var allElement = this.Id.getElementsByClassName("item"), cW = this.cW, cH = this.cH; this.centerXY = []; for(var i = 0 ; i < allElement.length; i++){ this.centerXY.push({ x: parseFloat(allElement[i].style.left) + cW / 2, y: parseFloat(allElement[i].style.top) + cH / 2 }); } }, mouseClick: function(event){ console.log(event) var event = event || window.event; var that = this; var target = event.target || event.srcElement; // 保证拖动的是想要的元素 if( target.parentElement.className.toLowerCase() == "item"){ var Element = target.parentElement; // 当当前点击目标为空白小方块时，终止函数 if(Element.getAttribute("data-index") == this.lastElement.sign){ return ; } // 存储当前元素的top,left var thisTop = parseFloat( Element.style.top ); var thisLeft = parseFloat( Element.style.left ); // 点击检测空白方块是否在当前对象周边 if(this.mouseClickCheck(thisTop, thisLeft)){ console.log(222) // 获取空白元素 var lastElement = document.getElementById(this.lastElement.Id); // 替换这两个元素的坐标 Element.style.top = lastElement.style.top; Element.style.left = lastElement.style.left; lastElement.style.top = thisTop + "px"; lastElement.style.left = thisLeft + "px"; this.lastElement.left = thisLeft ; this.lastElement.top = thisTop; // 消除层级问题 setTimeout(function(){ if(that.compareArray()){ alert("恭喜你，拼图成功！"); } }, 150); // 判断拼图完成 console.log(this.compareArray()) console.log(this.numberArr) } } return false; }, mouseClickCheck: function(thisTop, thisLeft){ var cW = this.cW, cH = this.cH; if(thisTop == this.lastElement.top && (thisLeft - cH) == this.lastElement.left){ return true; } if(thisTop == this.lastElement.top && (thisLeft + cH) == this.lastElement.left){ return true; } if((thisTop - cW) == this.lastElement.top && thisLeft == this.lastElement.left){ return true; } if((thisTop + cW) == this.lastElement.top && thisLeft == this.lastElement.left){ return true; } return false; }, getLastElement: function(){ // 获取空白元素 var lastElement = document.getElementById(this.lastElement.Id); console.log(this.lastElement); this.lastElement.left = parseFloat(lastElement.style.left) ; this.lastElement.top = parseFloat(lastElement.style.top); }, upsetElement: function(){ for (var i = 0; i < this.number-1; i++) { // 获取两个不相等的随机值 var n1 = Math.floor(Math.random()*this.number); var n2 = Math.floor(Math.random()*this.number); do{ n2 = Math.floor(Math.random()*this.number); }while(n1 == n2) // 替换当前的两个小方块的坐标 var allElement = this.Id.getElementsByClassName("item"); var Top = allElement[n1].style.top ; var Left = allElement[n1].style.left ; allElement[n1].style.top = allElement[n2].style.top ; allElement[n1].style.left = allElement[n2].style.left ; allElement[n2].style.top = Top ; allElement[n2].style.left = Left ; } }, compareArray: function(){ // 获取序号 var allElement = this.Id.getElementsByClassName("item"); for(var i = 0; i < this.number-1; i++){ // 比较序号 if( this.numberArr[i].x != allElement[i].style.left || this.numberArr[i].y != allElement[i].style.top ){ return false; } } return true; }, } // 实例化一个对象 var box = new JigsawGame({ Id: 'canvasBox', imgUrl: '../image/lingtai.jpg', level: 1, gameType: 1 }); // 实例化一个对象 var box2 = new JigsawGame({ Id: 'canvasBox2', imgUrl: '../image/lingtai.jpg', level: 1, gameType: 2 }); function setGame(a, b){ document.getElementById("canvasBox").style.display = a; document.getElementById("canvasBox2").style.display = b; } setGame("block", "none");感谢各位的阅读，以上就是“怎么使用js编写实现拼图游戏”的内容了，经过本文的学习后，相信大家对怎么使用js编写实现拼图游戏这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是编程网，小编将为大家推送更多相关知识点的文章，欢迎关注！
