cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   Omegas7
   Member

   In the init method of my game scene I have this:
   

   self.accelerometer = [UIAccelerometer sharedAccelerometer];
   		self.accelerometer.updateInterval = 0.025;
   		self.accelerometer.delegate = self;

   Which lets me use the accelerometer through this function:
   - (void)accelerometer:(UIAccelerometer*)accelerometer didAccelerate:(UIAcceleration*)acceleration

   And in the dealloc function I have this to quit the accelerometer:
   self.accelerometer.delegate = nil;

   It works fine, great indeed. However, when I lose the game, I am given two options: Retry this same scene or go to the title screen.
   When I choose to go to the title screen, then I choose the "Play" button, and I am sent to the game scene, and everything works fine.
   But, when I choose the Retry option, the scene restarts just fine, but the accelerometer isn't working! I can confirm the accelerometer function isn't called (NSLog at the beginning of that method >____>)... How is that possible?

   Posted 1 year ago #
2. 

   finder39
   Member

   i had the same thing happen to me, what i had to do was at the end of each scene, inot in dealloc but in the buttons function that runs when hit, i have to do this first

   - (void)ContinueButtonTapped:(id)sender {
   	self.isAccelerometerEnabled = NO;
   	[[CCDirector sharedDirector] replaceScene:[CCCrossFadeTransition transitionWithDuration:0.5 scene:[Space10Scene scene]]];
   }

   before running the rest of the code in the function. was only was to have it register when restarted or moving to next scene. not sure why,

   if you need a better explanation PM me

   Posted 1 year ago #
3. 

   Omegas7
   Member

   EDIT: Thanks! Actually I managed to fix it by putting
   

   self.accelerometer.delegate = nil;
   self.isAccelerometerEnabled = NO;

   at the beginning of the init method of my game scene.

   EDIT 2: OH MY... now it doesn't work! It sometimes works and sometimes doesn't! How is that possible?!

   Posted 1 year ago #
4. 

   finder39
   Member

   try mine, you dont wanna do it when entering a scene, you want to do it while exiting the scene like i did, trust me, i spent like 2 days trying EVERYTHING

   as i said if you need help PM me so i get an email, i don't always check back on forums. i try, just forget sometimes :)

   Posted 1 year ago #
5. 

   crmagicxxx
   Member

   @Omegas7

   First, why are you using self.accelerometer and how is that defined in your code?
   Second, if you traced how isAccelerometerEnabled is handled you'd notice the right way to use it.
   So I suggest you using it this way:

   1) In interface declaration, tell your class it is <UIAccelerometerDelegate>
   2) Set up accelerometer in onEnterTransitionDidFinish method:
   

   -(void) onEnterTransitionDidFinish {
       [[UIAccelerometer sharedAccelerometer] setUpdateInterval:ACCEL_INTERVAL];  // define accel interval here
       [[UIAccelerometer sharedAccelerometer] setDelegate:self];  // set the delegate
       [[UIApplication sharedApplication] setIdleTimerDisabled:YES];  // to disable phone lock if you're using only accelerometer in your game
   }

   3) Then disable accel in your onExit method:
   

   -(void) onExit {
   	[[UIAccelerometer sharedAccelerometer] setDelegate:nil];
   	[[UIApplication sharedApplication] setIdleTimerDisabled:NO];
   }

   So why in onEnterTransitionDidFinish? Because that way even if you're restarting current class you'd not confuse the UIAccelerometer singleton.

   Posted 1 year ago #
6. 

   Omegas7
   Member

   Ah, thanks, seems to work now.

   Posted 1 year ago #
7. 

   finder39
   Member

   no problem :)

   Posted 1 year ago #
8. 

   finder39
   Member

   @riq

   do you know why this may happen?

   Posted 1 year ago #
9. 

   ether
   Member

   accelerometer not working after i upload my cocos2d game to the app store

   Posted 3 months ago #

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