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ioscore-locationaugmented-realitycore-motion

CMAttitudeReferenceFrameXTrueNorthZVertical does not work

I am using Core Motion to get the attitude of the device.

My problem is that using CMAttitudeReferenceFrameXTrueNorthZVertical makes my Motion Manager breaking up. I use Core Location and start location updates before starting device motion updates but my CMDeviceMotion object is always nil.

Because I thought I made a mistake I downloaded the pARk sample code (Link to sample code) from Apple, where they also use CMAttitudeReferenceFrameXTrueNorthZVertical and CoreLocation and this is also not working.

I have an iPhone4S which shouldn't be the problem, because it's the newest hardware...

If I use CMAttitudeReferenceFrameXMagneticNorthZVertical instead, everything works properly.

Any suggestions?

Solution

  • Problem solved.

    This was because of deactivated compass calibration in the iOS 5 settings. I think this means the location mode may not be used for getting the true north.

    Because of that also Wikitude was not working properly...