Accelerometer and shake in objective c -

i've 2 questions:

1) in 1 of viewcontrollers write method find customized shake:

   - (void)accelerometer:(uiaccelerometer *)accelerometer didaccelerate:(uiacceleration     *)acceleration; 

and express accelerometer delegate in .h

the problem iphone simulator doesn't detect it, normal?

2) previous code in viewdidload write:

uiaccelerometer *accell = [uiaccelerometer sharedaccelerometer]; [accell setdelegate:self]; [accell setupdateinterval.....]; 

now want make delegate class, not write code each viewcontroller. how can this? how change code above?

in way:

delegateclass *delegateacceleration = [[delegateclass alloc]]init]; uiaccelerometer *accell = [uiaccelerometer sharedaccelerometer]; [accell setdelegate:delegateacceleration]; [accell setupdateinterval.....]; [delegateacceleration release]; 

1) yes normal, simulator doesn't support accelerometer. there third party tools can it, isimulate. run on device , send acceleration data app running in simulator

2) wrong, cannot release delegate class because uiaccelerometer doesn't retain delegate, if release right away break.