pdf object.messagehandler onMessage不在IE中工作 [英] pdf object.messagehandler onMessage not working in IE
问题描述
在我的pdf中,在我的onOpenAction中,我有这个js代码:
app.alert(this.hostContainer);
尝试{
this.hostContainer.postMessage(['Hello World']);
} catch(e){app.alert(e.message);}
in我的HTML,我有这样的代码:
$ b $ pre $ function messageFunc(messageArray){
alert(In message Func: + messageArray);
}
document.getElementById(pdfObject)。messageHandler = {onMessage:messageFunc};
在Chrome和FF中,此工作正常,一个PDF警报显示有效的hostContainer和一个Web浏览器警报显示消息,Hello World
在IE(11)中,我得到了pdf警报,显示了一个有效的hostContainer,但没有浏览器警报。没有提示说有错误。
我在做什么错?
原来,在你设置messageHandler之前,需要在IE中加载PDF,所以我这样做了:
function loadListener(){
var pdfObject = document.getElementById(pdfObject);
if(typeof pdfObject.readyState ==='undefined'){//就绪状态仅适用于IE,这很好,因为我们只需要为IE执行此操作,因为IE在第一个地方吸吮
pdfObject.messageHandler = {onMessage:messageFunc};
return;
}
if(pdfObject.readyState == 4){
pdfObject.messageHandler = {onMessage:messageFunc};
} else {
setTimeout(loadListener,500);
}
}
这适用于所有3种浏览器。是的。
In my pdf, in my onOpenAction, I have this js code:
app.alert(this.hostContainer);
try {
this.hostContainer.postMessage(['Hello World']);
} catch(e) {app.alert(e.message);}
in my html, I have this code:
function messageFunc(messageArray) {
alert("In message Func:"+messageArray);
}
document.getElementById("pdfObject").messageHandler = { onMessage: messageFunc };
In Chrome and FF this works fine, one pdf alert showing a valid hostContainer, and a web browser alert showing the message, Hello World
In IE (11) I get the pdf alert, showing a valid hostContainer, but no browser alert. No alert saying there was an error.
What am I doing wrong?
Turns out, that the PDF needs to be loaded in IE before you can set a messageHandler, So I have done this:
function loadListener() {
var pdfObject = document.getElementById("pdfObject");
if(typeof pdfObject.readyState === 'undefined') { // ready state only works for IE, which is good because we only need to do this for IE because IE sucks in the first place
pdfObject.messageHandler = { onMessage: messageFunc };
return;
}
if(pdfObject.readyState==4) {
pdfObject.messageHandler = { onMessage: messageFunc };
} else {
setTimeout(loadListener,500);
}
}
This is working across all 3 browsers. Yea.
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