How to change animating iamges with UIImageView

[cmpak]

Hi,

I am trying to reuse UIImageView object instead of creating a new one. I am doing so because I found that releasing a UIImageView having animation in the middle before closing the app makes the app crash.

It's because even after stopping a timer (stopAnimating), the timer in the run loop may still point to the already released object depending on the schedule. So I found that releasing a UIImageView which uses a timer object before closing the app is not quite safe. (Correct me if I'm wrong, but that's what I found)

This description from NSTimer class reference explains why:
"The run loop removes and releases the timer, either just before the invalidate method returns or at some later point."

Anyways, how can I change animation images for the existing UIImageView which is currently animating?

stopAnimating itself is ok, but after that if I assign a new array of images, it crashes.

// This crashes the app
[self.imageView stopAnimating];
self.imageView.animationImages = newImageArr;
self.imageView.animationDuration = 0.75; // Duration in seconds
self.imageView.animationRepeatCount = 0; // zero loops forever
[self.imageView startAnimating];

[cmpak]

It seems that there is no workaround to solve the problem. So I came up with these two possible workarounds:

1. Add enough UIImageViews and display one at a time and hide the others
2. Do animation with a NSTimer myself

I think that the second one makes more sense.

Sample code can be found at
http://thefirstgood.com/tc/entry/Cha...imation-images