<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
</head>
<body>
</body>
</html>
<!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>移动效果（按轨迹移动）</title>
<style type="text/css">
body,div{margin:0;padding:0;}
div{position:absolute;width:66px;height:45px;background:url(img/1.gif) no-repeat;top:100px;left:50px;}
p,input{margin:10px;}
</style>
<script type="text/javascript">
window.onload = function ()
{
var oDiv = document.getElementsByTagName("div")[0];
var aInput = document.getElementsByTagName("input");
var oP = document.getElementsByTagName("p")[0];
var i = 0;
aInput[0].onclick = function (event)
{
(event || window.event).cancelBubble = true;
clearEvent();
this.value += "(已激活)";
oP.innerHTML = "鼠标点击页面， 人物将移动至鼠标位置！";
document.onclick = function (event)
{
var event = event || window.event;
oDiv.style.background = "url(img/2.gif) no-repeat";
startMove(oDiv, {x:event.clientX, y:event.clientY}, function(){oDiv.style.background = "url(img/1.gif) no-repeat"});
return false;
}
};
aInput[1].onclick = function (event)
{
(event || window.event).cancelBubble = true;
clearEvent();
this.value += "(已激活)";
oP.innerHTML = "按住鼠标左键，在页面划动，人物将按照鼠标轨迹移动。"
var aPos = [{x:oDiv.offsetLeft, y:oDiv.offsetTop}];
document.onmousedown = function (event)
{
var event = event || window.event;
aPos.push({x:event.clientX, y:event.clientY});
document.onmousemove = function (event)
{
var event = event || window.event;
aPos.push({x:event.clientX, y:event.clientY});
return false;
}
return false;
}
document.onmouseup = function ()
{
document.onmousemove = null;
oDiv.style.background = "url(img/2.gif) no-repeat";
var timer = setInterval(function ()
{
if(aPos.length == 0)
{
clearInterval(timer);
oDiv.style.background = "url(img/1.gif) no-repeat";
return;
};
oDiv.style.left = aPos[0].x + "px";
oDiv.style.top = aPos[0].y + "px";
aPos.shift();
}, 30);
};
}
function clearEvent()
{
document.onclick = null;
document.onmousedown = null;
document.onmousemove = null;
document.onmouseup = null;
for (i = 0; i < aInput.length; i++)
{
aInput[i].value = aInput[i].value.replace("(已激活)", "");
aInput[i].onmousedown = aInput[i].onmouseup = function (event)
{
(event || window.event).cancelBubble = true;
};
}
}
};
function startMove(obj, oTarget, fnEnd)
{
clearInterval(obj.timer);
obj.timer = setInterval(function ()
{
doMove(obj, oTarget, fnEnd)
}, 30)
}
function doMove(obj, oTarget, fnEnd)
{
var iX = (oTarget.x - obj.offsetLeft) / 5;
var iY = (oTarget.y - obj.offsetTop) / 5;
iX = iX > 0 ? Math.ceil(iX) : Math.floor(iX);
iY = iY > 0 ? Math.ceil(iY) : Math.floor(iY);
if (oTarget.x == obj.offsetLeft && oTarget.y == obj.offsetTop)
{
clearInterval(obj.timer);
fnEnd && fnEnd();
}
else
{
obj.style.left = obj.offsetLeft + iX + "px";
obj.style.top = obj.offsetTop + iY + "px";
}
}
</script>
</head>
<body>
<input type="button" value="根据鼠标点击位置移动" /><input type="button" value="根据标鼠标轨迹移动" />
<p>请点击按钮激活功能！</p>
<div></div>
</body>
</html>var aPos = [{x:oDiv.offsetLeft, y:oDiv.offsetTop}]这个数组嘛？这行代码与aPos.push({x:event.clientX, y:event.clientY});之间是什么关系
或者是怎么运行的呢？有什么作用啊
还有就是 oDiv.style.left = aPos[0].x + "px";
oDiv.style.top = aPos[0].y + "px";
这两行代码是怎么运行的？这个x，y表示的是数值嘛？求解答
1 回答
一毛钱
TA贡献156条经验 获得超57个赞
这个是数组，aPos是定义了一个数组
aPos.push（）是向数组中添加元素
他们之间的关系是一个是定义数组，一个数组的方法（添加数组元素）
XY 指的是偏移XY轴的值
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