Cocos2d's skew action exceeds itself when there is a framerate hiccup - ios

Question

It's simple: I have some sprites that are repeating a Skew action to one side and then the other in my map.
When there is a framerate hiccup, you can see that suddenly the skew exceeds itself - that is, if it should be at 2.0f, it looks like it is at 50.0f or something. If you wait a bit, it stabilises alright.
I suspect it is due to a framerate hiccup because it happens in the following scenarios:
When the phone is locked and then unlocked.
The application comes to foreground from the background.
The map scene was frozen in the Director's scene stack (because I used pushScene) and then it was resumed (by calling popScene).
It doesn't happen always. I've seen it occur in iPhones 4 and 5 - as well as iPads.
Is there a way to control this skew so it doesn't exceed itself ever?
cocos2d-iphone 1.0.1

Answer 1

When I had a problem like that it was because CCDirector was not paused properly when backgrounded.. so have you made sure that you are pausing/resuming the director and starting/stopping animation in all the right places?
-(void) applicationSignificantTimeChange:(UIApplication *)application
{
[[CCDirector sharedDirector] setNextDeltaTimeZero:YES];
}
-(void) applicationDidEnterBackground:(UIApplication*)application
{
[[CCDirector sharedDirector] stopAnimation];
}
-(void) applicationWillEnterForeground:(UIApplication*)application
{
[[CCDirector sharedDirector] startAnimation];
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{
[[CCDirector sharedDirector] resume];
}
- (void)applicationWillResignActive:(UIApplication *)application
{
[[CCDirector sharedDirector] pause];
}