Question

I have a simple animation which simply modify the position of a button:

[UIView beginAnimation:nil context:nil];
[UIView setAnimationsDuration:3.0];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
mybutton.frame = CGREctMake(20, 233, 280, 46);
[UIView commitAnimations];

I want to perform some other animations when this one is finish, how to do that?

Answer 1

a code segment for getting start.. setup initial (the first) animation:

- (void) aniPath:(AnimationPath *) path
{   
    [UIView beginAnimations:path->aniname context:path];
    [UIView setAnimationDuration:path->interval];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationDidStopSelector:@selector(aniDone:finished:context:)];

    // your initial animation

    [UIView commitAnimations];
}

chains to another animation when the first is done:

- (void) aniDone:(NSString *) aniname finished:(BOOL) finished context:(void *) context
{
    AnimationPath *path = (AnimationPath *) context;
    if ([aniname isEqualToString:path->aniname]) {
        [UIView beginAnimations:path->aniname context:context];
        [UIView setAnimationDuration:path->interval];
        [UIView setAnimationDelegate:self];
        [UIView setAnimationDidStopSelector:@selector(aniDone:finished:context:)];

        // more animations, even recursively 

        [UIView commitAnimations];          
    }
}