js 动画3 完美框架
Posted yangykaifa
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js 框架：
同一时候动画（多个动作同一时候完毕）：
function getStyle(obj,attr){
if(obj.currentStyle){
return obj.currentStyle[attr];
}
else{
return getComputedStyle(obj,false)[attr];
}
}
function startMove(obj,json,fn){
var flag = true;//如果
clearInterval(obj.timer);
obj.timer = setInterval(function(){
for(var attr in json)
{
//取当前值
var icur = 0;
if(attr == ‘opacity‘){
icur = Math.round(parseFloat(getStyle(obj,attr))*100);
}
else{
icur = parseInt(getStyle(obj,attr))
}
//算速度
var speed = (json[attr]-icur)/8;
speed = speed >0?Math.ceil(speed):Math.floor(speed);
//检測停止
if(icur != json[attr]){
flag = false;
}
if(attr == ‘opacity‘){
obj.style.filter = ‘alpha(opacity:‘+(icur +speed)+‘)‘;
obj.style.opacity = (icur + speed)/100;
}
else{
obj.style[attr] = icur + speed + ‘px‘;
}
}
if(flag){
clearInterval(obj.timer);
if(fn){
fn();
}
}
},30)
}
链式动画（前一个动作完毕。后一个动作继续）：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>链式框架</title> <style> body,ul,li{ margin:0; padding:0; } ul,li{ list-style:none; } ul li{ width:200px; height:100px; margin-bottom:10px; background:yellow; border: 4px solid #000; filter:alpha(opacity:30); opacity: 0.3; } </style> <script src="move.js"></script> <script> window.onload = function(){ var li = document.getElementById(‘li1‘); li.onmouseover = function(){ startMove(li,‘width‘,400,function(){ startMove(li,‘height‘,200,function(){ startMove(li,‘opacity‘,100); }); }); } li.onmouseout = function(){ startMove(li,‘opacity‘,30,function(){ startMove(li,‘height‘,100,function(){ startMove(li,‘width‘,200); }); }); } } </script> </head> <body> <ul> <li id="li1"></li> </ul> </body> </html>
同一时候动画（多个动作同一时候完毕）：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>同一时候动画</title>
<style>
body,ul,li{
margin:0;
padding:0;
}
ul,li{
list-style:none;
}
ul li{
width:200px;
height:100px;
margin-bottom:10px;
background:yellow;
border: 4px solid #000;
filter:alpha(opacity:30);
opacity: 0.3;
}
</style>
<script src="move.js"></script>
<script>
window.onload = function(){
var oli = document.getElementById(‘li1‘);
oli.onmouseover = function(){
startMove(oli,{width:400,height:200,opacity:100});
}
oli.onmouseout = function(){
startMove(oli,{width:200,height:100,opacity:30});
}
}
</script>
</head>
<body>
<ul>
<li id="li1"></li>
</ul>
</body>
</html>
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