iphonesdk震动

iPhone摇晃时如何使用振动？ 这是我的密码：

#pragma mark -
- (void)accelerometer:(UIAccelerometer *)accelerometer 
        didAccelerate:(UIAcceleration *)acceleration {
   {
        if (acceleration.x > kAccelerationThreshold 
            || acceleration.y > kAccelerationThreshold
            || acceleration.z > kAccelerationThreshold) {


  **//Vibrate it !** 

        }
    }
}

你可以做：

AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);

确保添加AudioToolbox框架