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js 动画3 完美框架

2024-09-14 14:09:47   217人阅读

js 框架：
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="http://www.mamicode.com/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="http://www.mamicode.com/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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