Js万能运动框架

/**
* Created by ios1 on 17/4/8.
*/

function  getStyle(obj,attr) {

if(obj.currentStyle){

return  obj.currentStyle[attr];

}else{

return window.getComputedStyle(obj,false)[attr];
}
}

function startMove(obj,json,Func) {

clearInterval(obj.timer);
obj.timer = setInterval(function () {

var stop=true;

for (var attr in json){

var currentAttr = 0;
if(attr == 'opacity'){

currentAttr = Math.round(parseFloat(getStyle(obj,attr))*100);

}else{

currentAttr = parseInt(getStyle(obj,attr));

}

var speed = (json[attr] - currentAttr)/5;
speed = speed>0?Math.ceil(speed):Math.floor(speed);

if(json[attr] != currentAttr) stop = false;

if(attr =='opacity'){

obj.style.opacity = (currentAttr + speed)/100;
obj.style.filter = 'alpha(opacity:'+(currentAttr + speed)+')'
}else{

obj.style[attr] = currentAttr + speed +'px';

}

}

if (stop){

clearInterval(obj.timer);

if(Func)Func();
}

},30);

}