iOS not receiving touchEvent at app start up

SGaist

Hi and welcome to devnet,

Sounds strange, I'd recommend taking a look at the bug report system to see if it's something known.

Also, are you using QtQuick or QWidget ?

matthew.kuiash

@SGaist Hi & thanks! QWidget (sort of). I'm using none of the QWidget stuff as I have my own OpenGL/GLES code (not much of an abstraction, i like it that way as it's game code!) So I'm using QGuiApplication and QWindow as well as Qt OGL surface abstractions.

I don't use those classes directly in my code, there's a very thin abstraction layer so I can do work that I need on all platforms, notably setting up app specific persistent storage areas and kicking a derived store/restore function.

I'm trying to whittle the code down to a minimum amount required to reproduce the problem.

I'll update on Monday.

I'm no Qt noob BTW. I've done a couple of platform ports and was active at Qt Centre from about 10 years ago under a couple of different aliases. If I have to dig into the guts of Qt that's no problem.

matthew.kuiash

@SGaist I think this ... https://bugreports.qt.io/browse/QTBUG-53874 is related.

SGaist

Might be, note that both platforms have different backend.

Could you also test with Qt 5.7.0 ? That way it could help pinpoint whether it's something new to 5.7.1.

matthew.kuiash

@SGaist I noticed that. That is the difference between platform plugin ios and cocoa.

I still haven't got to the bottom of the problem but instead I switched my "platform_window_opengl" to use QOpenGLWindow. That code path fixes the problem. I still don't need to pull in the widget library (don't need/use it) so for now I'm happy.

When I get a chance I'll dig into the implementation of QOpenGLWindow vs QWindow (with own context creation) to see what functionality is missing.

Does it still sound worthy of bug repoting to you?

SGaist

Yes please. Even if the recommended way to build mobile UI is QML, it's better to have that kind of stuff known.

matthew.kuiash

@SGaist I've tested with 5.7.1 and 5.8. I'm very sorry but as a solo developer I don't (at the moment) have time to run those sort of regressions.

matthew.kuiash

@SGaist I've got weird and horrible news.

I let my iPhone update to 10.2 (from 9.3) last night and now the problem doesn't occur!

These sort of things make me go... ARGH!

Rameshguru

hi,
now i start qt basic programming,can i use c sharp .dl
l in qt programming ?

SGaist

@matthew-kuiash sure thing, I understand. Ok, so there was something going on with 9.3. I think it's still worth mentioning.

@Rameshguru Please don't highjack other people threads with completely unrelated questions, open your own threads.

matthew.kuiash

@SGaist Done https://bugreports.qt.io/browse/QTBUG-58014

Thanks for your help with this "heisenbug"

Rameshguru

@SGaist how to use .dll any possibility is there

SGaist

@matthew-kuiash You're welcome !

Happy hacking :)

@Rameshguru Again, please, open your own thread.

Rameshguru

oh sorry ,i don't know

SGaist

Since it's C# related, go to General and Desktop. On the top left there's a big blue button call New Topic.