QCompass on iOS using Qt 5.2.0-beta1

[cezmen]

Did anyone succeed on accessing the Compass sensor of an iPhone using QCompass and QCompassFilter classes with Qt 5.2.0-beta1 version? I've tried it through several different ways, with no success. I'm using XCode 4.6.3 and iOS 6.0.1.

The exact issue is that "bool QSensor::start()" method always returns "false" and then nothing happens.

[cezmen]

According to the "Compatibility Map" of Qt 5.2 Sensors, the following features are supposed to work on iOS : Accelerometer, Compass, Gyroscope, Magnetometer and Proximity Sensors.

http://qt.apidoc.info/5.2.0-beta1/qtsensors/compatmap.html

In my tests, neither Accelerometer nor Compass are working.

[SGaist]

Hi and welcome to devnet,

Did you test it on the simulator or a real device ? AFAIK, the simulator doesn't provide everything a device does.

In the second case, you should check the "bug report system":http://bugreports.qt-project.org To see whether it something known. If not you can open a new report providing a minimal compilable example that shows the bug.

[cezmen]

Thank you. I actually tested on a real device (iPhone 4s / iOS 6.0.1). However, it seems that no sensor works correctly (QSensor::start() always returns false). I'll check the "bug report system".

[cezmen]

Definitely, QSensor class is not working yet for iOS devices (with Qt 5.2.0-beta1) version. I've tried several simple test Apps for instantiating and detecting sensors on several devices (iPhone and iPad), with different versions of XCode (4.6.3 and 5.0.1) and iOS (iOS5 , iOS6 and iOS7).

QSensor::sensorTypes() should return a list of available sensors but, instead, returns an empty list. As there aren't sensors available, QSensor::start() always returns false (failing to start any sensor).

I hope we all have a better luck with the final release of Qt 5.2.0.

[SGaist]

You should rather ask the status on the interest mailing list, during the DD in Berlin there was a demonstration using QtQuick and the accelerometers
so there should be something

[ainwoodblackberry.com]

Any idea if this has been fixed? I'm using 5.2.1 and am seeing the same issue.

[cezmen]

To make sensors work with iOS Apps, just make sure the following statements are included in your .PRO files :

QT += sensors
QTPLUGIN += qtsensors_ios

[AlterX]

I think it is the same of this one:
https://bugreports.qt-project.org/browse/QTBUG-35277

[ainwoodblackberry.com]

Thanks cezmen, that's what I needed.