Animations stopping on OS4 after resuming app with multitasking...

[rr299]

Hi so I have an app with a few animations which run continuously. They are very basic and are called using a combination of the commitAnimations style code and the new animation block code (animateWithDuration). All this works fine. I have a preferences view which I can load in and out and my animations run smoothly as I expect.

I just loaded my app onto my new iPhone 4 to test and I have a major problem. When I dismiss the app and reload it (either from the icon on the home page or on the multitasking bar) all the animations stop/crash. I don't get any error messages in my console and I have some timers running which continue as expected. I have tried calling the animation methods again when the app comes back to life but this doesn't work. It's as if everything has frozen. I've spent some time googling this but I can't find a single entry with the same problem, surely I'm not alone??

Has anyone had this problem? Or maybe someone could suggest some ways of overcoming this - I'll give anything I'm a try. I'm pretty new to this so any suggestions would be very useful.

Thanks

[rr299]

Hmm the plot thickens! So I have managed to get my animations to continue after the app has been dismissed to the multitasking tray. To do this I have to reset the initial position when the app comes to life again, like this...

	wheel.transform = CGAffineTransformMakeRotation(0);

and for completeness this is my animation block...

[UIView animateWithDuration:30 delay:0.0
 options:(UIViewAnimationOptionAllowUserInteraction |
UIViewAnimationOptionCurveLinear 
|UIViewAnimationOptionRepeat
 )
animations:^(void){
wheel.transform = CGAffineTransformMakeRotation(M_PI*-0.5);
 }
completion:^(BOOL finished){
 if(finished){							  NSLog(@"^^^^^^^^wheel^^^^FINSIHED");
]}
}];

Whilst this is working it isn't perfect because the animation skips back to its start position when the view loads. I guess I can live with it but I'd rather not. Can anyone explain why I have to do this or how I could get around it?

Thanks

[rr299]

Anyone??

[martingale]

I'm having a similar problem. I was able to overcome this problem by turning off the ability for the app to run in the background by adding the key: "Application does not run in background" and setting it to YES in the info.plist. If your app does not need to run in the background this is not a problem. I believe this is an apple bug.