How to make gentle shaking gesture

Today I implemented shake gesture in a game. I noticed I must to shake with my iPad really hard to make things happened. (default setting).

Here is simple solution for making shaking more gentle. Just experiment with accelerationTreshold value.

.h

@interface ViewController : UIViewController <UIAccelerometerDelegate> 

.m

// customize here
#define accelerationThreshold 1.3

- (void)viewDidLoad
{
 UIAccelerometer *accel = [UIAccelerometer sharedAccelerometer];
 accel.delegate = self;
 accel.updateInterval = 1.0f/60.0f;
}

// event handling
- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration
{
 if (fabsf(acceleration.x) > accelerationThreshold || fabsf(acceleration.y) > accelerationThreshold || fabsf(acceleration.z) > accelerationThreshold) {
 // your action here 
 }
}
}