2014/10/15 下午 10:06:41

iphone Programming Glossary: didupdateheading

iPhone 3.0 Compass: how to get a heading?

http://stackoverflow.com/questions/1043740/iphone-3-0-compass-how-to-get-a-heading

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

code in the same 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..

Why am I getting 0 degrees from magneticField property the whole time?

http://stackoverflow.com/questions/11711646/why-am-i-getting-0-degrees-from-magneticfield-property-the-whole-time

return normal values for these methods so you will need to test on a real device. The CLLocationManager 's method didUpdateHeading doesn't work on the simulator so you are probably experiencing something similar here. Edit From the docs The latest sample..

Rotate MapView using Compass orientation

http://stackoverflow.com/questions/1245461/rotate-mapview-using-compass-orientation

you could use the 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..

CLLocationManager and degrees of heading in iPhone

http://stackoverflow.com/questions/2043685/cllocationmanager-and-degrees-of-heading-in-iphone

and degrees of heading in iPhone Using the CLLocationManager object's didUpdateHeading event how do I convert the resulting heading.x and heading.y values into degrees I can plot onto an image of a compass ..

Point to location using compass

http://stackoverflow.com/questions/5092845/point-to-location-using-compass

result 360 The 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.. here newLocation.coordinate self calculateUserAngle here void locationManager CLLocationManager manager didUpdateHeading CLHeading newHeading compass.transform CGAffineTransformMakeRotation newHeading.magneticHeading M_PI 180 needle.transform..

How to rotate a Direction Arrow to particular location

http://stackoverflow.com/questions/7173925/how-to-rotate-a-direction-arrow-to-particular-location

user.longitude 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.. geolocation 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..