基于JavaScript实现十五拼图代码实例

时间：2021-05-25

顾名思义，十五拼图就是将游戏画面中的数字从上到下，从左到右按顺序从1到15排列下来，看起来很简单，但是玩起来不容易。

css代码

body { font-family: cursive; font-size: 14pt; text-align: center;}#puzzlearea { height: 400px; margin: 0 auto; position: relative; width: 400px;}.highlight { border-color: red; cursor: pointer;}.puzzletile { background-image: url("../background.jpg"); border: 5px solid black; position: absolute;}.highlight, #output { color: red;}.puzzletile, #output { font-size: 40pt;}

html代码

<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>CSE 154 Fifteen Puzzle</title> <!-- your files that you will write --> <link href="css/fifteen.css" rel="external nofollow" type="text/css" rel="stylesheet"/> <script src="js/fifteen.js" type="text/javascript"></script></head><body><h1>Fifteen Puzzle</h1><p> The goal of the fifteen puzzle is to un-jumble its fifteen squares by repeatedly making moves that slide squares into the empty space. How quickly can you solve it?</p><div id="puzzlearea"> <!-- this area holds the actual fifteen puzzle pieces add to it as you need to --></div><p id="controls"> <button id="shufflebutton">Shuffle</button></p><div id="output"></div><p> American puzzle author and mathematician Sam Loyd is often falsely credited with creating the puzzle; indeed, Loyd claimed from 1891 until his death in 1911 that he invented it. The puzzle was actually created around 1874 by Noyes Palmer Chapman, a postmaster in Canastota, New York.</p></body></html>

JavaScript代码

(function () { "use strict"; let NUM = 4; //拼图的行列数 the number of rows/cols in the puzzle let spaceRow = 3; // 空白图块所在行 let spaceColumn = 3; // 空白图块所在列 let WIDTH = 100; // the pixel width/height of each tile // gets everything set when the window has loaded window.onload = function () { setSize(); document.getElementById("select").onchange = changeSize; document.getElementById("shufflebutton").onclick = shuffle; createSquares(); }; // add a drop-down list to select difficulty level // 设置下拉列表 默认选中 option4 function setSize() { var select = document.createElement("select"); select.id = "select"; for (var i = 3; i < 7; i++) { var option = document.createElement("option"); option.innerHTML = i + " * " + i; option.value = i; option.id = "option" + i; select.appendChild(option); } document.getElementById("controls").appendChild(select); document.getElementById("option4").selected = "selected"; } function changeSize() { NUM = this.value; spaceRow = this.value - 1; spaceColumn = this.value - 1; WIDTH = parseInt(400 / this.value); var puzzlearea = document.getElementById("puzzlearea"); while (puzzlearea.contains(document.querySelector(".puzzletile"))) { puzzlearea.removeChild(document.querySelector(".puzzletile")); } createSquares(); } // creates 15 puzzle tiles and sets them to their initial position function createSquares() { for (var i = 1; i < NUM * NUM; i++) { var div = document.createElement("div"); div.className = "puzzletile"; div.innerHTML = i; var row = Math.floor((i - 1) / NUM); var column = (i - 1) % NUM; var x = column * -1 * WIDTH + "px"; var y = row * -1 * WIDTH + "px"; // 减去边框的宽度 并且宽高相等 div.style.height = WIDTH - 10 + "px"; div.style.width = div.style.height; // 设置background 的 position div.style.backgroundPosition = x + " " + y; // 为每个拼图添加ID div.id = "square_" + row + "_" + column; // 设置水平和垂直方向的偏移量 div.style.top = row * WIDTH + "px"; div.style.left = column * WIDTH + "px"; setEvents(div); document.getElementById("puzzlearea").appendChild(div); } } // shuffles puzzle tiles for 1000 times function shuffle() { // 实现Shuffle算法 for (let j = 0; j < 1000; j++) { let neigbors = []; // 将所有的拼图 存储到 allPuzzles中 let allPuzzles = document.getElementsByClassName("puzzletile"); // 将与空白图块相邻的拼图 存储到数组neigbors中 for (let i = 0; i < allPuzzles.length; i++) { // 判断拼图是否可以移动 if (moveable(allPuzzles[i])) neigbors.push(allPuzzles[i]); } // 得到一个随机的索引 let ranNum = getRandomIntInclusive(0, neigbors.length - 1); // 获取需要移动的拼图移动之前的偏移量 let tempTop = neigbors[ranNum].style.top; let tempLeft = neigbors[ranNum].style.left; // 将拼图移动到空白图块处 neigbors[ranNum].style.top = spaceRow * WIDTH + "px"; neigbors[ranNum].style.left = spaceColumn * WIDTH + "px"; neigbors[ranNum].id = "square_" + spaceRow + "_" + spaceColumn; // 更改空白图块的位置 spaceRow = parseInt(tempTop) / WIDTH; spaceColumn = parseInt(tempLeft) / WIDTH; } } // 获取指定区间的随机数 function getRandomIntInclusive(min, max) { min = Math.ceil(min); max = Math.floor(max); return Math.floor(Math.random() * (max - min + 1)) + min; } // sets up events for all puzzle tiles function setEvents(div) { div.onmouseover = function () { if (moveable(this)) { this.classList.add("highlight"); // when mouse over, adds class "highlight" } }; div.onmouseout = function () { // when mouse out, removes class "highlight" if (moveable(this)) { this.classList.remove("highlight"); // when mouse out, remove class "highlight" } }; div.onclick = helper; } // a helper function for function "makeAMove" // displays "congratulations" if the player wins function helper() { if (moveable(this)) { makeAMove(this); if (win()) { document.getElementById("output").innerHTML = "Congratulations! You win!"; } else { document.getElementById("output").innerHTML = ""; } } } // make one move for the given tile function makeAMove(div) { div.id = "square_" + spaceRow + "_" + spaceColumn; var divRow = parseInt(div.style.top) / WIDTH; var divColumn = parseInt(div.style.left) / WIDTH; div.style.top = spaceRow * WIDTH + "px"; div.style.left = spaceColumn * WIDTH + "px"; spaceRow = divRow; spaceColumn = divColumn; } // return true if the given tile is moveable function moveable(div) { var divRow = parseInt(div.style.top) / WIDTH; var divColumn = parseInt(div.style.left) / WIDTH; if (spaceRow == divRow) { return Math.abs(spaceColumn - divColumn) == 1; } else if (spaceColumn == divColumn) { return Math.abs(spaceRow - divRow) == 1; } else { return false; } } // return true if all tiles are at their original positions function win() { var tiles = document.querySelectorAll(".puzzletile"); for (var i = 0; i < tiles.length; i++) { var row = Math.floor(i / NUM); var column = i % NUM; if (tiles[i].id != "square_" + row + "_" + column) { console.log(tiles[i].id); return false; } } return true; }})();

最后的效果

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