Posted in Javascript onOctober 16, 2014
IE8支持function.bind()方法
<script type="text/javascript">
if (!Function.prototype.bind) {
Function.prototype.bind = function (oThis) {
if (typeof this !== "function") {
throw new TypeError("Function.prototype.bind - what is trying to be bound is not callable");
}
var aArgs = Array.prototype.slice.call(arguments, 1),
fToBind = this,
fNOP = function () {},
fBound = function () {
return fToBind.apply(this instanceof fNOP && oThis
? this
: oThis,
aArgs.concat(Array.prototype.slice.call(arguments)));
};
fNOP.prototype = this.prototype;
fBound.prototype = new fNOP();
return fBound;
};
}
</script>
主要解决“百度地图”官网上的例子的bug，摘取如下代码：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
body, html {width: 100%;height: 100%;margin:0;font-family:"微软雅黑";}
#allmap{width:100%;height:500px;}
p{margin-left:5px; font-size:14px;}
</style>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=39b92e64ae5622663ceceaccd8ab8eb1"></script>
<script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script>
<title>给多个点添加信息窗口</title>
<script type="text/javascript">
if (!Function.prototype.bind) {
Function.prototype.bind = function (oThis) {
if (typeof this !== "function") {
throw new TypeError("Function.prototype.bind - what is trying to be bound is not callable");
}
var aArgs = Array.prototype.slice.call(arguments, 1),
fToBind = this,
fNOP = function () {},
fBound = function () {
return fToBind.apply(this instanceof fNOP && oThis
? this
: oThis,
aArgs.concat(Array.prototype.slice.call(arguments)));
};
fNOP.prototype = this.prototype;
fBound.prototype = new fNOP();
return fBound;
};
}
</script>
</head>
<body>
<div id="allmap"></div>
<p>点击标注点，可查看由纯文本构成的简单型信息窗口</p>
</body>
</html>
<script type="text/javascript">
// 百度地图API功能
map = new BMap.Map("allmap");
map.centerAndZoom(new BMap.Point(116.417854,39.921988), 15);
var data_info = [[116.417854,39.921988,"地址：北京市东城区王府井大街88号乐天银泰百货八层"],
[116.406605,39.921585,"地址：北京市东城区东华门大街"],
[116.412222,39.912345,"地址：北京市东城区正义路甲5号"]
];
var opts = {
width : 250, // 信息窗口宽度
height: 80, // 信息窗口高度
title : "信息窗口" , // 信息窗口标题
enableMessage:true//设置允许信息窗发送短息
};
for(var i=0;i<data_info.length;i++){
var marker = new BMap.Marker(new BMap.Point(data_info[i][0],data_info[i][1])); // 创建标注
var content = data_info[i][2];
map.addOverlay(marker); // 将标注添加到地图中
marker.addEventListener("click",openInfo.bind(null,content));
}
function openInfo(content,e){
var p = e.target;
var point = new BMap.Point(p.getPosition().lng, p.getPosition().lat);
var infoWindow = new BMap.InfoWindow(content,opts); // 创建信息窗口对象
map.openInfoWindow(infoWindow,point); //开启信息窗口
}
</script>
让IE8浏览器支持function.bind()方法
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