我正在编写一些面向对象的Javascript代码。我有几个类的实例,并且已经将不同的数据放入其中。不幸的是,如下面的例子所示,它们似乎共享相同的数据。
是否可能获得两个单独的类实例?应该如何实现。
Index.html
<html>
<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8">
<script type="text/javascript" src="test.js"></script>
<script type="text/javascript">
debugger;
// Do this because a page resart seems to keep old data
function SetGlobals()
{
var ui;
var el;
// Arr00
ui = document.getElementById("Arr00");
el = arr0.arrayGet(0);
ui.innerHTML = el.m_String;
// Arr01
ui = document.getElementById("Arr01");
el = arr0.arrayGet(1);
ui.innerHTML = el.m_String;
// Arr10
ui = document.getElementById("Arr10");
el = arr1.arrayGet(0);
ui.innerHTML = el.m_String;
// Arr11
ui = document.getElementById("Arr11");
el = arr1.arrayGet(1);
ui.innerHTML = el.m_String;
}
function MyOnLoad()
{
SetGlobals();
}
</script>
</head>
<body onload="MyOnLoad()" style="width:100%; height: 100%; padding: 0 0 0 0; margin: 0 0 0 0; overflow: hidden; background:#000000">
<div id="divScreen" style="display: block; width:100%; height="100%">
<div id="divMenu" style='float: left; background:#00FF00; border-color: #000000; border-width: 1px;'>
<table>
<tr>
<td>
Array 0/String 0: <label id="Arr00"></label>
</td>
</tr>
<tr>
<td>
Array 0/String 1: <label id="Arr01"></label>
</td>
</tr>
<tr>
<td>
Array 1/String 0: <label id="Arr10"></label>
</td>
</tr>
<tr>
<td>
Array 1/String 1: <label id="Arr11"></label>
</td>
</tr>
</table>
</div>
<div id="divMain" style='height: 100%; background:#0000FF; margin-left: 250px; border-color: #000000; border-width: 1px;'>
</div>
</div>
</body>
</html>
Test.js
var BaseARR = function()
{
_arr = []; // new Array();
// Public functions that can access private members
this.Add = function(arg)
{
var i, addAt;
if(arg==null || (addAt = FindEnterPos(arg))<0)
return false;
// since adding and not deleting anything, nothing of value will be returned
_arr.splice(addAt, 0, arg);
return true;
};
// This finds the entry position for in
FindEnterPos = function(arg)
{
return (_arr.length + 1);
};
this.arrayGet = function(i)
{
return ((_arr != null && i >= 0 && i < _arr.length) ? _arr[i] : null);
};
};
var stringId = function(id, str)
{
// public has a this. , privates have just var
this.m_Id = id; // int
this.m_String = str; // string
};
// This so allow statics
var stringIdARR = function()
{
BaseARR.call(this);
};
new BaseARR()
。如果要使用该构造函数获取新对象,您需要使用new
关键字。 - BishopRook_arr
上缺少了一个var
,这使它成为全局变量。 - Eric