问题
I am not able to call a javascript function from QT .
I am using the below code
QT code :QWebFrame *frame = m_d->m_webView->page()->mainFrame();
frame->evaluateJavaScript("displayhello()");
Here `displayhello()` is the `Javascript` function defined in the HTML file.
HTML code :
<html>
<head>
<script type="text/javascript" src="" />
<script type="text/javascript">
function displaymessage(str)
{
alert(str);
}
function displayhello()
{
alert("Hello");
}
</script>
</head>
<body>
<form>
<input type="button" value="Click me!" onClick="displayhello()">
</form>
</body>
</html>
Can anyone give me any pointers why the Javascript function is not getting called.
回答1:
I know this post is old but in case someone has the same:
Always check Dev Tools to see what the JavaScript console tells you. You can enable devtools by adding this line tou your QT main function
QWebSettings::globalSettings()->setAttribute(QWebSettings::DeveloperExtrasEnabled, true);
Now by right clicking->inspect, console, you would have seen the JS interpret error.
回答2:
You should have lower case 'c' in 'onclick':
<input type="button" value="Click me!" onclick="displayhello()">
回答3:
QVariant holdInformation = map->page()->mainFrame()->evaluateJavaScript (QString ("displayhello ()"));
Replace map by your desired class name.
Also, try using onload.<body onload = "displayhello()" topmargin = "0" leftmargin = "0">
来源：https://stackoverflow.com/questions/12578377/how-to-call-evaluatejavascript-function-from-qt