Does anyone know how to find the compass heading of an iOS device from within a web app? The new Device Orientation APIs supported in iOS 4.2 only seem to provide relative changes in rotation. Was anyone able to find a workaround to this? (I also get a null value for the coords.heading property when using navigator.geolocation.)
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Matt
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I have the same problem in iOS 5. Very frustrating. – Paul Mendoza Jan 05 '12 at 18:08
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Compass support is available in the devicemotion event through new attributes: webkitCompassHeading and webkitCompassAccuracy. There is also a new event we can subscribe to: compassneedscalibration. This will work only on iPad 2, iPhone 4, 4S and iPod touch last generation.
source: http://www.mobilexweb.com/blog/ios-5-iphone-and-ipad-html5
alternatively: Access device compass from webb app with Javascript
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Sebastian Flückiger
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