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页面a.html域名为www.a.com嵌入页面http://www.b.com/b.html,b.html要调用a.html中的js函数，由于两个页面不在一个域中，会提示没权限。如何解决该问题呢，请看下面示例代码。
cross.js
复制代码 代码如下:
(function(global){
global.Cross = {
signalHandler: {},
on: function(signal, func){
this.signalHandler[signal] = func;
},
call: function(win, domain, signal, data, callbackfunc){
var notice = {"signal": signal, "data": data};
if(!!callbackfunc){
notice["callback"] = "callback_" + new Date().getTime();
Cross.on(notice["callback"], callbackfunc);
}
var noticeStr = JSON.stringify(notice);
win.postMessage(noticeStr, domain);
}
};
$(window).on("message", function(e) {
var realEvent = e.originalEvent,
data = realEvent.data,
swin = realEvent.source,
origin = realEvent.origin,
protocol;
try {
protocol = JSON.parse(data);
var result = global.Cross.signalHandler[protocol.signal].call(null, protocol.data);
if(!!protocol["callback"]){
Cross.call(swin, origin, protocol["callback"], {result: result});
}
if(/^callback_/.test(protocol.signal)){
delete Cross.signalHandler[protocol.signal];
}
} catch (e) {
console.log(e);
throw new Error("cross error.");
}
});
})(window);
a.html
复制代码 代码如下:
<!doctype HTML>
<html>
<head>
<script src="jquery-1.8.3.min.js"></script>
<script src="cross.js"></script>
<script>
function call_b(){
var ifw = $("#ifr")[0].contentWindow;
//调用iframe子页面的公开的test接口, 子页面域名为http://localhost:8088
Cross.call(ifw,"http://localhost:8088","test",{t: $("#txt").val()});
}
</script>
</head>
<body>
<input id="txt" type="text"/>
<button onclick="call_b()">call</button>
<iframe id="ifr" src="http://localhost:8088/b.html"></iframe>
</body>
</html>
b.html
复制代码 代码如下:
<!doctype HTML>
<html>
<head>
<script src="jquery-1.8.3.min.js"></script>
<script src="cross.js"></script>
<script>
//对外公开一个接口命名为test
Cross.on("test", function(data){
alert(data.t);
});
</script>
</head>
<body>
</body>
</html>
以上就是本文所述的iframe跨域的解决方案了，希望大家能够喜欢。 | 
发表于 2018-12-25 05:33:59
