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2014/10/15 ¤U¤È 10:05:07
iphone Programming Glossary: clheadingiPhone 3.0 Compass: how to get a heading? http://stackoverflow.com/questions/1043740/iphone-3-0-compass-how-to-get-a-heading it yet so I apologise for what is probably a really amateurish question. I'm trying to get the magnetic heading from CLHeading and CLLocationDirection. However I'm getting compile errors for this line of code locationLabel.text location course magneticHeading..
Optimizing CLLocationManager/CoreLocation to retrieve data points faster on the iPhone http://stackoverflow.com/questions/1081219/optimizing-cllocationmanager-corelocation-to-retrieve-data-points-faster-on-the module as above This is the Heading or Compass values void locationManager CLLocationManager manager didUpdateHeading CLHeading newHeading if newHeading.headingAccuracy 0 newHeading retain headingType YES for True North or NO for Magnetic North if..
Rotate MapView using Compass orientation http://stackoverflow.com/questions/1245461/rotate-mapview-using-compass-orientation following code to compensate for the maps rotation. void locationManager CLLocationManager manager didUpdateHeading CLHeading newHeading double rotation newHeading.magneticHeading 3.14159 180 CGPoint anchorPoint CGPointMake 0 23 The anchor point..
Point to location using compass http://stackoverflow.com/questions/5092845/point-to-location-using-compass true and the magnetic heading is retrieved like this void locationManager CLLocationManager manager didUpdateHeading CLHeading newHeading arrow.transform CGAffineTransformMakeRotation newHeading.magneticHeading NSLog @ magnetic heading f newHeading.magneticHeading.. newLocation.coordinate self calculateUserAngle here void locationManager CLLocationManager manager didUpdateHeading CLHeading newHeading compass.transform CGAffineTransformMakeRotation newHeading.magneticHeading M_PI 180 needle.transform CGAffineTransformMakeRotation..
How to rotate a Direction Arrow to particular location http://stackoverflow.com/questions/7173925/how-to-rotate-a-direction-arrow-to-particular-location get angle between user location and fix location void locationManager CLLocationManager manager didUpdateHeading CLHeading newHeading arrow.transform CGAffineTransformMakeRotation degrees newHeading.trueHeading M_PI 180 but the code above will.. share improve this question this code may help you void locationManager CLLocationManager manager didUpdateHeading CLHeading newHeading Use the true heading if it is valid. CLLocationDirection direction newHeading.magneticHeading CGFloat radians..
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