基于jQuery UI实现游戏人物方向键移动动画

核心代码结构

<!DOCTYPE html>
<html>
<head>
<title>js游戏人物上下左右跑步效果 </title>
<meta charset="utf-8"/>
<style type="text/css">
table {
 position: absolute;
 top: 100px;
 right: 100px;
 width: 150px;
 height: 150px;
}
input {
 width: 40px;
 height: 30px;
 background: orange;
 color: white;
 font-weight: bold;
 border: none;
 border-radius: 5px;
}
img {
 position: absolute;
 top: 300px;
 left: 500px;
}
</style>
</head>
<body>
<img id="im" src="images/down-0.png" />
<table>
 <tr>
 <td><input id="leftUp" type="button" value="左上" /></td>
 <td><input id="goUp" type="button" value="向上" /></td>
 <td><input id="rightUp" type="button" value="右上" /></td>
 </tr>
 <tr>
 <td><input id="goLeft" type="button" value="左" /></td>
 <td><input id="stop" type="button" value="停止" /></td>
 <td><input id="goRight" type="button" value="右" /></td>
 </tr>
 <tr>
 <td><input id="leftDown" type="button" value="左下" /></td>
 <td><input id="goDown" type="button" value="向下" /></td>
 <td><input id="rightDown" type="button" value="右下" /></td>
 </tr>
</table>
<script type="text/javascript">
 var i = 0, clc = null, flage;
 var images = document.getElementById('im');

 var oGoUp = document.getElementById('goUp');
 var oGoDown = document.getElementById('goDown');
 var oGoLeft = document.getElementById('goLeft');
 var oGoRight = document.getElementById('goRight');
 var oLeftUp = document.getElementById('leftUp');
 var oLeftDown = document.getElementById('leftDown');
 var oRightUp = document.getElementById('rightUp');
 var oRightDown = document.getElementById('rightDown');
 var oStop = document.getElementById('stop');

 images.style.top = '300px';
 images.style.left = '500px';

 //停止
 oStop.onclick = function(){
 switch(flage){
 case 1: images.src = 'images/up-0.png';break;
 case 2: images.src = 'images/down-0.png';break;
 case 3: images.src = 'images/left-0.png';break;
 case 4: images.src = 'images/right-0.png';break;
 case 5: images.src = 'images/rightUp-0.png';break;
 case 6: images.src = 'images/rd-0.png';break;
 case 7: images.src = 'images/ld-0.png';break;
 case 8: images.src = 'images/lu-0.png';break;
 }
 clearInterval(clc);
 }
 //向上
 oGoUp.onclick = function(){
 i = 0;
 clearInterval(clc);
 clc = setInterval("goUp(i++);", 100);
 }
 function goUp(){
 i = i % 4;
 var name ="images/up-" + i + "." + "png";
 images.src = name;
 images.style.top = parseInt(images.style.top) - 10 + 'px';
 flage = 1;
 }
 //向下
 oGoDown.onclick = function(){
 i = 0;
 clearInterval(clc);
 clc = setInterval("goDown(i++);", 100);
 }
 function goDown(){
 i = i % 4;
 var name ="images/down-" + i + "." + "png";
 images.src = name;
 images.style.top = parseInt(images.style.top) + 10 + 'px';
 flage = 2;
 }
 //向左
 oGoLeft.onclick = function(){
 i = 0;
 clearInterval(clc);
 clc = setInterval("goLeft(i++);", 100);
 }
 function goLeft(){
 i = i % 4;
 var name ="images/left-" + i + "." + "png";
 images.src = name;
 images.style.left = parseInt(images.style.left) - 10 + 'px';
 flage = 3;
 }
 //向右
 oGoRight.onclick = function(){
 i = 0;
 clearInterval(clc);
 clc = setInterval("goRight(i++);", 100);
 }
 function goRight(){
 i = i % 4;
 var name ="images/right-" + i + "." + "png";
 images.src = name;
 images.style.left = parseInt(images.style.left) + 10 + 'px';
 flage = 4;
 }
 //向右上
 oRightUp.onclick = function(){
 i = 0;
 clearInterval(clc);
 clc = setInterval("goRightUp(i++);", 100);
 }
 function goRightUp(){
 i = i % 4;
 var name ="images/rightUp-" + i + "." + "png";
 images.src = name;
 images.style.left = parseInt(images.style.left) + 10 + 'px';
 images.style.top = parseInt(images.style.top) - 10 + 'px';
 flage = 5;
 }
 //向右下
 oRightDown.onclick = function(){
 i = 0;
 clearInterval(clc);
 clc = setInterval("goRightDown(i++);", 100);
 }
 function goRightDown(){
 i = i % 4;
 var name ="images/rd-" + i + "." + "png";
 images.src = name;
 images.style.left = parseInt(images.style.left) + 10 + 'px';
 images.style.top = parseInt(images.style.top) + 10 + 'px';
 flage = 6;
 }
 //向左下
 oLeftDown.onclick = function(){
 i = 0;
 clearInterval(clc);
 clc = setInterval("goLeftDown(i++);", 100);
 }
 function goLeftDown(){
 i = i % 4;
 var name ="images/ld-" + i + "." + "png";
 images.src = name;
 images.style.left = parseInt(images.style.left) - 10 + 'px';
 images.style.top = parseInt(images.style.top) + 10 + 'px';
 flage = 7;
 }
 //向左上
 oLeftUp.onclick = function(){
 i = 0;
 clearInterval(clc);
 clc = setInterval("goLeftUp(i++);", 100);
 }
 function goLeftUp(){
 i = i % 4;
 var name ="images/lu-" + i + "." + "png";
 images.src = name;
 images.style.left = parseInt(images.style.left) - 10 + 'px';
 images.style.top = parseInt(images.style.top) - 10 + 'px';
 flage = 8;
 }
 </script>
<div style="text-align:center;clear:both">
</div>
</body>
</html>