[SOLVED] QGeoCoordinate returns Nan in iOS

[hasti66]

Hi , I use qt 5.3.2 on mac to implement an application for iOS. I want to get user current location. My code is here:

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source = QGeoPositionInfoSource::createDefaultSource(this);
if (source){
text->append("sourceName: " + source->sourceName()); //return: core location
source->setPreferredPositioningMethods(QGeoPositionInfoSource::AllPositioningMethods);
source->setUpdateInterval(10000);
}

QGeoPositionInfo info = source->lastKnownPosition();
QGeoCoordinate coordinate = info.coordinate();
latitude = QString::number(coordinate.latitude());
longitude = QString::number(coordinate.longitude());

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The code works for android but in iOS(iPhone 4s) latitude and longitude are nan.
in .pro file, i added:
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QT +=positioning
LIBS += -framework CoreLocation
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What's wrong in my code? please help me.

[hasti66]

I found my problem. I added a line of code to above function and it works.

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source->setUpdateInterval(10000);
source->updateRequest(); //this line of code solve my problem
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