How does Night Camera access the camera?

Hello,
Night Camera is an app that takes a photo when it detects the phone is relatively still. This is supposed to help reduce shake and make night pictures sharper.
My question: How do they do this? The only way to access the camera is to use the UIImagePicker which is totally user dependent. How dot they trigger the camera via software?
Thanks

It's possible without private calls and using documented code.
When no motion is detected, a NSTimer is enabled. When the timer fires, you ask the capture button for its target and associated action.
You perform this action on the found target, as documented here:
http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UIContro lClass/Reference/Reference.html#//appleref/occ/instm/UIControl/allTargets
http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UIContro lClass/Reference/Reference.html#//appleref/occ/instm/UIControl/actionsForTarget:forControlEvent:

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