封装多属性运动函数

1、缓冲运动：
function startMove(node, cssObj, complete){
//complete = callback
clearInterval(node.timer);
node.timer = setInterval(function(){
var isEnd = true; //假设所有运动都到达目的值了
for(var attr in cssObj){
var iTarget = cssObj[attr];
//1、获取当前样式
var iCur = null;
if(attr == “opacity”){
iCur = parseInt(parseFloat(getStyle(node, attr)) * 100);
}else{
iCur = parseInt(getStyle(node, attr));
}
var speed = (iTarget - iCur) / 8;
speed = speed > 0 ? Math.ceil(speed) : Math.floor(speed);
if(attr == “opacity”){
iCur += speed;
node.style.opacity = iCur / 100;
node.style.filter = “alpha(opacity=” + iCur + “)”;
}else{
node.style[attr] = iCur + speed + ‘px’;
}
if(iCur != iTarget){
isEnd = false;
}
}
if(isEnd){
clearInterval(node.timer);
if(complete){
complete.call(node);
}
}
}, 30);
}
// 获取当前样式的浏览器兼容写法
function getStyle(node, styleType){
return node.currentStyle ? node.currentStyle[styleType] : getComputedStyle(node)[styleType];
}

2、匀速运动
function startMove(node, speed, attr, iTarget, complete){
clearInterval(node.timer);
node.timer = setInterval(function(){
var iCur = parseInt(getStyle(node, attr));
speed = iCur > iTarget ? -Math.abs(speed) : Math.abs(speed);

	if(Math.abs(iCur - iTarget) < Math.abs(speed)){
clearInterval(node.timer);
//手动挪动到目的值
node.style[attr] = iTarget + 'px';
if(complete){
complete.call(node);
}
}else{
node.style[attr] = iCur + speed + 'px';
}
}, 30);

}

最后

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