how to manage accelerometer value .x and .y

hello i am making game application in that game i a moving game using accelerometer but i want that my ball should not mo开发者_高级运维ve in upper direction , only move my ball in right ,left and bottom side

please help me........

You can change the value of gravity to +ve or -ve.

Please have a look at the BubbleLevel sample code available at

• http://developer.apple.com/library/ios/#samplecode/BubbleLevel/Introduction/Intro.html

This will help you for sure.