[Interest] black screen with iOS app over airplay?

[Tor Arne Vestbø]

https://bugreports.qt.io/browse/QTBUG-56768

On 13/05/2017 18:56, Patrick Stinson wrote:
> Hmm. This did not work for me and I am starting to realize that there
> are more problems in the Qt code than we may be aware.
>
> One problem, and maybe the main problem, is that Qt seems to incorrectly
> rely on the OS view that is created when the app is created, but this
> view doesn’t persist when airplay is engaged or when it is disengaged. I
> think any of us could see this problem when you disable airplay
> mirroring while running a Qt app and the app crashes.
>
> This problem also appears to prevent Reflector 2 from showing the
> mirrored view of the iPad app when running the Qt app, which I can only
> interpret to mean that the Qt view is not complying with the OS’s
> standardized view API. Reflector works fine when another app or
> launchpad (desktop) is shown.
>
> So there is some work to do here…I wish I was better with UIKit to
> troubleshoot.
>
>
>> On May 12, 2017, at 2:11 PM, bralchenko at ics.com
>> <mailto:bralchenko at ics.com> wrote:
>>
>> Yes, I think that’s the one.
>>
>>
>> Regards,
>>     Boris Ralchenko.
>>
>>
>>
>>
>>
>>> On May 12, 2017, at 5:08 PM, Patrick Stinson <patrickkidd at gmail.com
>>> <mailto:patrickkidd at gmail.com>> wrote:
>>>
>>> Do you mean QMainWindow? That is the class that I am deriving from.
>>>
>>> On May 12, 2017, at 1:38 PM, bralchenko at ics.com
>>> <mailto:bralchenko at ics.com> wrote:
>>>
>>>> On main window, in our case it was derived from QQuickView.
>>>>
>>>> Regards,
>>>>     Boris Ralchenko.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>> On May 12, 2017, at 4:33 PM, Patrick Stinson <patrickkidd at gmail.com
>>>>> <mailto:patrickkidd at gmail.com>> wrote:
>>>>>
>>>>> Oh excellent. Which object do you call setGeometry on?
>>>>>
>>>>> On May 12, 2017, at 1:13 PM, bralchenko at ics.com
>>>>> <mailto:bralchenko at ics.com> wrote:
>>>>>
>>>>>> Patrick,
>>>>>>
>>>>>> you have to setGeometry(QRect screenGeometry) explicitly.
>>>>>> screenGeometry should be queried from iOS directly, like this:
>>>>>>
>>>>>> constCGRectr=[[UIScreenmainScreen]bounds];
>>>>>> returnQRect(0,0,r.size.width,r.size.height);
>>>>>>
>>>>>>
>>>>>> We had similar problem, black screen with AirPlay or with HDMI
>>>>>> dongle. This solved it for us.
>>>>>>
>>>>>> Regards,
>>>>>>     Boris Ralchenko.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>> On May 11, 2017, at 9:16 PM, Patrick Stinson
>>>>>>> <patrickkidd at gmail.com <mailto:patrickkidd at gmail.com>> wrote:
>>>>>>>
>>>>>>> Hello! Has anyone else had a problem with Qt apps only showing as
>>>>>>> a black screen when mirroring an iOS device over airplay? Other
>>>>>>> apps display fine, but then the AirPlay display turns black when
>>>>>>> the Qt app is brought to the front.
>>>>>>>
>>>>>>> Granted, I am using Reflector 2 to show the iPad screen on my Mac
>>>>>>> with latest macOS Sierra, (in order to show the iPad on a
>>>>>>> projector), but it just uses the AirPlay protocol on the iOS end
>>>>>>> so I assume it is a problem with the Qt iOS view.
>>>>>>>
>>>>>>> Thanks!_______________________________________________
>>>>>>> Interest mailing list
>>>>>>> Interest at qt-project.org <mailto:Interest at qt-project.org>
>>>>>>> http://lists.qt-project.org/mailman/listinfo/interest
>>>>>>
>>>>
>>
>
>
>