这个运动框架适合绝大多数的动画运动,话不多说,先上代码:
function move(obj,json,fn){
//关闭定时器
clearInterval(obj.timer);
//开启定时器
obj.timer = setInterval(function(){
var bStop = true;
for(var attr in json){
//先判断是否是透明度
var iCur;
if(attr == "opacity"){
//parseInt:防止在IE出现闪烁问题
iCur = parseInt(parseFloat(getStyle(obj,attr))*100);
}else{
//将字符串转换为数字
iCur = parseInt(getStyle(obj,attr));//对opacity进行兼容处理;
}
//算速度
var speed = (json[attr] - iCur)/8;
speed = speed>0?Math.ceil(speed):Math.floor(speed);
if(json[attr] != iCur){
bStop = false;
}
if(attr == "opacity"){
obj.style.opacity = (iCur+speed)/100;
obj.style.filter = "alpha(opacity:"+(iCur+speed)+")"
}else{
obj.style[attr] = iCur+speed+'px';
}
}
//如果所有都到达了目标点,关闭定时器
if(bStop){
clearInterval(obj.timer);
fn&&fn();
}
},30)
}