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2014/10/15 ¤U¤È 10:15:35
iphone Programming Glossary: user.latitudePoint to location using compass http://stackoverflow.com/questions/5092845/point-to-location-using-compass floatValue locLon ann objectForKey @ longitude floatValue NSLog @ f f locLat locLon float pLat float pLon if locLat user.latitude locLon user.longitude north east pLat user.latitude pLon locLon degrees 0 else if locLat user.latitude locLon user.longitude.. NSLog @ f f locLat locLon float pLat float pLon if locLat user.latitude locLon user.longitude north east pLat user.latitude pLon locLon degrees 0 else if locLat user.latitude locLon user.longitude south east pLat locLat pLon user.longitude degrees.. pLon if locLat user.latitude locLon user.longitude north east pLat user.latitude pLon locLon degrees 0 else if locLat user.latitude locLon user.longitude south east pLat locLat pLon user.longitude degrees 45 else if locLat user.latitude locLon user.longitude..
How to rotate a Direction Arrow to particular location http://stackoverflow.com/questions/7173925/how-to-rotate-a-direction-arrow-to-particular-location NSLog @ my destination is f f fixlocLat fixlocLon degrees degrees atan2 sin fixlocLon user.longitude cos fixlocLat cos user.latitude sin fixlocLat sin user.latitude cos fixlocLat cos fixlocLon user.longitude get angle between user location and fix location.. fixlocLon degrees degrees atan2 sin fixlocLon user.longitude cos fixlocLat cos user.latitude sin fixlocLat sin user.latitude cos fixlocLat cos fixlocLon user.longitude get angle between user location and fix location void locationManager CLLocationManager..
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