UIImageView animation finish notification

[imapps]

Hi all,

I've searched the web and Apple docs for a way to get notified when UIImageView animation finishes but AFAICS there is no way for that.

I have lots of small UIImageViews (about 50-60) each one having the same sequence of PNG images in a NSArray (image001, image002.... image025) and I want to start animating all of them. But I want to be notified when the last one finishes so I can know for sure that all of them finished animating.

Can anyone suggest how to do this easily? If it can't be done with UIImageView, maybe some other way?

Thanks in advance!

[dancriel]

You could use an NSTimer. Every time you begin an image animation, you could invoke something like this:

setTimerWithInterval:(float)interval {
    [myTimer invalidate];
    myTimer = nil;

    myTimer = [NSTimer scheduledTimerWithTimeInterval:interval target:self selector:@selector(timerFired) userInfo:nil repeats:NO];
}

This way, any new animations beginning before current animations finish can reset the timer with its own animation duration as the interval, and the timer will only fire when the last animation is complete.

[imapps]

Interesting idea, thanks a lot for taking the time to reply.

Although, I'm worried what would happen if the first (or any other) animation finishes before the next one starts... I'll have to experiment with the numbers.

I'll try this first thing in the morning and let you know how it goes. Thanks again for the tip.

[imapps]

It seems to have done the trick!

I had to do some extra logic since the timer is accessed from multiple threads so it crashed but once I fixed that it did what I needed.

Thanks man, you saved my day!

[dancriel]

Originally Posted by imapps

It seems to have done the trick!

I had to do some extra logic since the timer is accessed from multiple threads so it crashed but once I fixed that it did what I needed.

Thanks man, you saved my day!

No problem

One additional thought occurred to me - you may have already thought about this, but you should probably make sure that your new interval isn't shorter than the remaining time for the existing timer.

[imapps]

Yeah, but in my case that can't happen since all the animations have the same duration. Additionally, the timer has a longer firing interval just in case something goes wrong. But thanks for pointing that out.

[neosarchizo]

How about this??

Firstly add new file .h, and .m

Then write following in header.

@interface TempUIImageView : UIImageView
{ ...

And we check that animation is ended or not by using this class.

I wanna test, but I'm so beginner so I can't...

How about this??