DeviceOrientationEvent in Safari iPhone 3GS iOS 4.2

honestjung

2011-03-17 04:15:02

Im trying to get orientation and accelaration information with Javascript. Safari with iOS 4.2 at iPhone 3GS and iPhone 4 should support both device motion and orientation APIs. However, it seems DeviceOrienationEvent is not working in Safari at iPhone 3GS + iOS 4.2. In javascript,
window.DeviceMotionEvent
window.DeviceOrientationEvent
both of these are defined, so I expect event listeners for them to work but,
window.addEventListener( devicemotion, function( event ){ ...
window.addEventListener( deviceorientation, function( event ) { ...
for devicemotion, this event listener works good, but not deviceorientation.
Ive checked with iPhone4, and it works just fine. Both device motion listener and device orientation listener work, but not iPhone 3GS.
Is this a bug in Safari or iOS 4.2? Any idea?
Thanks.
iPhone 3G S iOS 4

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RE:DeviceOrientationEvent in Safari iPhone 3GS iOS 4.2

redjhawk

2011-03-17 04:15:02

Even if you can subscribe to whatever event you want in the browser, you will only receive only those the browser can send.
To get deviceorientation events you need a gyroscope, which iphone4 and ipad2 have but not iphon3GS or ipad.
If you go to DeviceOrientationEvent class reference (http://developer.apple.com/library/safari/#documentation/SafariDOMAdditions/Reference/DeviceOrientationEventClassRef/DeviceOrientationEvent/DeviceOrientationEvent.html#//apple_ref/doc/uid/TP40010526), you can read that Instances of DeviceOrientationEvent are fired only when the device has a gyroscope and while the user is changing the orientation.
If you use devicemotion, you will not be able to get the acceleration property if your device doesnt have a gyroscope. In that case, you will have to get accelerationIncludingGravity
P.s: Sorry to get a thread from some months ago but in Spanish we say Its better late than never and I considered this quite useful
Message was edited by: redjhawk
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