实例介绍
【实例简介】
【实例截图】
【核心代码】
var board = new Array();
var score = 0;
var hasConflicted = new Array();
var startx = 0;
var starty = 0;
var endx = 0;
var endy = 0;
$(document).ready(function() {
prepareForMobile();
newgame();
score = 0;
updateScore(score);
})
function prepareForMobile() {
if (documentWidth > 500) {
gridContainerWidth = 500;
cellSpace = 20;
cellSideLength = 100;
}
$("#main").css("width", gridContainerWidth - 2 * cellSpace);
$("#main").css("height", gridContainerWidth - 2 * cellSpace);
$("#main").css("padding", cellSpace);
$("#main").css("border-radius", 0.01 * gridContainerWidth);
$(".main-box").css("width", cellSideLength);
$(".main-box").css("height", cellSideLength);
$(".main-box").css("border-radius", 0.01 * cellSideLength);
}
function newgame() {
//初始化棋盘格
init();
//随机生成两个数字
generateOneNumber();
generateOneNumber();
}
function init() {
for (var i = 0; i < 4; i ) {
for (var j = 0; j < 4; j ) {
var gridCell = $("#box-" i "-" j)
gridCell.css("top", getPosTop(i, j))
gridCell.css("left", getPosLeft(i, j))
}
}
for (var i = 0; i < 4; i ) {
board[i] = new Array();
hasConflicted[i] = new Array();
for (var j = 0; j < 4; j ) {
board[i][j] = 0;
hasConflicted[i][j] = false;
}
}
updateBoardView();
score = 0;
}
function updateBoardView() {
$(".number-cell").remove();
for (var i = 0; i < 4; i ) {
for (var j = 0; j < 4; j ) {
$("#main").append('<div class="number-cell" id="number-cell-' i '-' j '"></div>')
var theNumberCell = $('#number-cell-' i '-' j)
if (board[i][j] == 0) {
theNumberCell.css({
"width": "0",
"height": "0"
})
theNumberCell.css("top", getPosTop(i, j) cellSideLength / 2)
theNumberCell.css("left", getPosLeft(i, j) cellSideLength / 2)
} else {
theNumberCell.css('width', cellSideLength);
theNumberCell.css('height', cellSideLength);
theNumberCell.css('top', getPosTop(i, j));
theNumberCell.css('left', getPosLeft(i, j));
theNumberCell.css('background-color', getNumberBackgroundColor(board[i][j]));
theNumberCell.css('color', getNumberColor(board[i][j]));
theNumberCell.text(getNumberText(board[i][j]));
}
hasConflicted[i][j] = false;
}
$(".number-cell").css("line-height", cellSideLength "px");
$(".number-cell").css("font-size", 0.3 * cellSideLength "px");
}
}
function generateOneNumber() {
if (nospace(board))
return false;
//随机一个位置
var randx = parseInt(Math.floor(Math.random() * 4));
var randy = parseInt(Math.floor(Math.random() * 4))
var times = 0;
while (times < 50) {
if (board[randx][randy] == 0)
break;
randx = parseInt(Math.floor(Math.random() * 4));
randy = parseInt(Math.floor(Math.random() * 4))
times ;
}
if (times == 50) {
for (var i = 0; i < 4; i )
for (var j = 0; j < 4; j ) {
if (doard[i][j] == 0) {
randx = i;
randy = j;
}
}
}
//随机一个数字
var randNumber = Math.random() < 0.5 ? 2 : 4;
//在随机的位置上显示数字
board[randx][randy] = randNumber;
showNumberWithAnimation(randx, randy, randNumber)
return true;
}
$(document).keydown(function(event) {
switch (event.keyCode) {
case 37: //left
//preventDefault() 方法阻止元素发生默认的行为（例如，当点击提交按钮时阻止对表单的提交）。
event.preventDefault()
if (moveLeft()) {
setTimeout("generateOneNumber()", 210);
setTimeout("isgameover()", 300);
}
break;
case 38: //up
event.preventDefault()
if (moveUp()) {
setTimeout("generateOneNumber()", 210);
setTimeout("isgameover()", 300);
}
break;
case 39: //right
event.preventDefault()
if (moveRight()) {
setTimeout("generateOneNumber()", 210);
setTimeout("isgameover()", 300);
}
break;
case 40: //down
event.preventDefault()
if (moveDown()) {
setTimeout("generateOneNumber()", 210);
setTimeout("isgameover()", 300);
}
break;
}
})
document.addEventListener('touchstart', function(event) {
startx = event.touches[0].pageX;
starty = event.touches[0].pageY;
})
document.addEventListener('touchmove', function(event) {
event.preventDefault()
})
document.addEventListener('touchend', function(event) {
endx = event.changedTouches[0].pageX;
endy = event.changedTouches[0].pageY;
var deltax = endx - startx;
var deltay = endy - starty;
if (Math.abs(deltax) < 0.3 * documentWidth && Math.abs(deltay) < 0.3 * documentWidth)
return;
//x轴进行滑动
if (Math.abs(deltax) >= Math.abs(deltay)) {
if (deltax > 0) {
//move right
if (moveRight()) {
setTimeout("generateOneNumber()", 210);
setTimeout("isgameover()", 300);
}
} else {
//move left
if (moveLeft()) {
setTimeout("generateOneNumber()", 210);
setTimeout("isgameover()", 300);
}
}
}
//y轴进行滑动
else {
if (deltay > 0) {
//move down
if (moveDown()) {
setTimeout("generateOneNumber()", 210);
setTimeout("isgameover()", 300);
}
} else {
//move up
if (moveUp()) {
setTimeout("generateOneNumber()", 210);
setTimeout("isgameover()", 300);
}
}
}
})
function isgameover() {
if (nospace(board) && nomove(board)) {
gameover();
}
}
function moveLeft() {
if (!canMoveLeft(board))
return false;
//moveLeft
for (var i = 0; i < 4; i )
for (var j = 1; j < 4; j ) {
if (board[i][j] != 0) {
for (var k = 0; k < j; k ) {
if (board[i][k] == 0 && noBlockHorizontal(i, k, j, board)) {
//move
showMoveAnimation(i, j, i, k)
board[i][k] = board[i][j]
board[i][j] = 0;
continue
} else if (board[i][k] == board[i][j] && noBlockHorizontal(i, k, j, board) && !hasConflicted[i][k]) {
//move
showMoveAnimation(i, j, i, k)
//add
board[i][k] = board[i][j]
board[i][j] = 0;
//addscore
score = board[i][k]
updateScore(score)
hasConflicted[i][k] = true;
continue
}
}
}
}
setTimeout("updateBoardView()", 200)
return true;
}
function moveRight() {
if (!canMoveRight(board))
return false;
//moveRight
for (var i = 0; i < 4; i )
for (var j = 2; j >= 0; j--) {
if (board[i][j] != 0) {
for (var k = 3; k > j; k--) {
if (board[i][k] == 0 && noBlockHorizontal(i, k, j, board)) {
//move
showMoveAnimation(i, j, i, k)
board[i][k] = board[i][j]
board[i][j] = 0;
continue
} else if (board[i][k] == board[i][j] && noBlockHorizontal(i, j, k, board) && !hasConflicted[i][k]) {
//move
showMoveAnimation(i, j, i, k)
//add
board[i][k] *= 2;
board[i][j] = 0;
//addscore
score = board[i][k]
updateScore(score)
hasConflicted[i][k] = true;
continue
}
}
}
}
setTimeout("updateBoardView()", 200)
return true;
}
function moveUp() {
if (!canMoveUp(board))
return false;
//moveUp
for (var j = 0; j < 4; j )
for (var i = 1; i < 4; i ) {
if (board[i][j] != 0) {
for (var k = 0; k < i; k ) {
if (board[k][j] == 0 && noBlockVertical(j, k, i, board)) {
showMoveAnimation(i, j, k, j);
board[k][j] = board[i][j];
board[i][j] = 0;
continue;
} else if (board[k][j] == board[i][j] && noBlockVertical(j, k, i, board) && !hasConflicted[k][j]) {
showMoveAnimation(i, j, k, j);
board[k][j] *= 2;
board[i][j] = 0;
//addscore
score = board[k][j]
updateScore(score)
hasConflicted[k][j] = true;
continue;
}
}
}
}
setTimeout("updateBoardView()", 200);
return true;
}
function moveDown() {
if (!canMoveDown(board))
return false;
//moveDown
for (var j = 0; j < 4; j )
for (var i = 2; i >= 0; i--) {
if (board[i][j] != 0) {
for (var k = 3; k > i; k--) {
if (board[k][j] == 0 && noBlockVertical(j, k, i, board)) {
showMoveAnimation(i, j, k, j);
board[k][j] = board[i][j];
board[i][j] = 0;
continue;
} else if (board[k][j] == board[i][j] && noBlockVertical(j, i, k, board) && !hasConflicted[k][j]) {
showMoveAnimation(i, j, k, j);
board[k][j] *= 2;
board[i][j] = 0;
//addscore
score = board[k][j]
updateScore(score)
hasConflicted[k][j] = true;
continue;
}
}
}
}
setTimeout("updateBoardView()", 200);
return true;
}
function gameover() {
$(".over").show();
$(document).click(function() {
$(".over").hide()
})
}
$("#bot").click(function() {
score = 0;
updateScore(score)
})
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