2013-02-10 iOS 5.0でのdidAccelerate deprecatedです。startAccelerometerUpdatesToQueue:withHandler: を使う?http://developer.apple.com/library/ios/#documentation/CoreMotion/Reference/CMMotionManager_Class/Reference/Reference.html#//apple_ref/occ/instm/CMMotionManager/startAccelerometerUpdatesToQueue:withHandler: