Turns out the problem wasn't mine. Previously we had been using
websockets but now websockets are bad so went with Web channel. Honestly
believed the bug was mine since the captive Web site worked fine with
websocket previously. Turns out it wasn't. Latest "front end" code has
html, angular, javascript and half a dozen other things. Because of
that, when they execute a function which returns a string, it actually
doesn't wait for a response. Nice. When one of the developers forces a
5-10 second delay between making the call and using the string passed
back, they get the value.
Thanks for your help though.
On 12/12/2018 3:55 PM, Jason H wrote:
I did this, in some abandoned work. Turns out QWebWhatever didn't do it right
on iOS. It can't return a QVariantMap, you have to stringify it.
Timer {
id: testTimer
interval: 1000
repeat:false
running: false
onTriggered: {
webview.runJavaScript("try {testResult} catch (e)
{'undefined'}", function (result) {
console.log('object', JSON.stringify(result));
});
webview.runJavaScript("try {JSON.stringify(testResult)}
catch (e) {'undefined'}", function (result) {
console.log('stringified',
JSON.stringify(result));
});
}
onRunningChanged: console.log('running', running);
}
WebView {
id: webview
anchors.fill: parent
onLoadProgressChanged: {
console.log('loadProgress', loadProgress)
if (loadProgress == 100) testTimer.running = true;
}
}
Sent: Wednesday, December 12, 2018 at 3:46 PM
From: rol...@logikalsolutions.com
To: interest@qt-project.org
Subject: [Interest] resturn string to javascript inside QWebEngineView
All,
Having a massive brain spasm today. Can't remember how to correctly
return a string from a function to javascript being run inside of
QWebEngineView via QWebChannel. Long ago when I first did this we used
QWebSockets but that had horrible nasty side effects and was banned
from the project during my absence. Cannot find a link how to do this
either.
It appears the real problem is Javascript isn't recognizing the
signature so refuses to call.
--
Roland Hughes, President
Logikal Solutions
(630) 205-1593
http://www.theminimumyouneedtoknow.com
http://www.infiniteexposure.net
http://www.johnsmith-book.com
http://www.logikalblog.com
http://www.interestingauthors.com/blog
http://lesedi.us
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