SBSAccelerometer

SBSAccelerometer is a class in the SpringBoardServices.framework which can be used to create an own SBAccelerometerInterface, even from within SpringBoard.app. It's advantage above hooking "accelerometer"-methods in SpringBoard is that a delegate can be chosen.

Creating an instance of SBSAccelerometer and the delegate

Once an instance of SBSAccelerometer has been created you can use _checkIn to activate it; to deactivate it you send _checkOut. Example:

SBSAccelerometer *acc = [[SBSAccelerometer alloc] init];
acc.accelerometerEventsEnabled = YES;
acc.updateInterval = 0.1;
acc.xThreshold = 0.2;
acc.yThreshold = 0.2;
acc.zThreshold = 0.2;
acc._orientationEventsEnabled = NO;
acc.delegate = myAccDelegateInstance;
[acc _checkIn];

The delegate has to implement:

- (void)accelerometer:(SBSAccelerometer*)accelerometer didAccelerateWithTimeStamp:(NSTimeInterval)timestamp
	x:(CGFloat)x y:(CGFloat)y z:(CGFloat)z eventType:(unsigned)type

For orientation Events you need to enable _orientationEventsEnabled and implement the following method in your delegate:

- (void)accelerometer:(SBSAccelerometer*)accelerometer didChangeDeviceOrientation:(UIDeviceOrientation)newOrientation

References

• Header: http://github.com/kennytm/iphone-private-frameworks/blob/master/SpringBoardServices/SBSAccelerometer.h