can't animate over a loop in an animation block - iphone

Question

I have the following animation block:
[UIView animateWithDuration:3.0 animations:^{
NSLog(#"INDEX %d", index);
[self.visibleViewControllers_ enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
UIViewController *viewController = (UIViewController *)obj;
if (viewController.view.tag != index){
if (viewController.view.tag < index){
NSLog(#"LOWER VIEW WITH TAG %d", viewController.view.tag);
[viewController.view setFrameY:self.contentOffset.y - viewController.view.frameHeight];
} else if (viewController.view.tag > index){
NSLog(#"UPPER VIEW WITH TAG %d", viewController.view.tag);
[viewController.view setFrameY:600];
} else {
[viewController.view setFrame:CGRectMake(0, self.contentOffset.y, selectedView.frameWidth, 460)];
}
}
}];
//[selectedView setFrame:CGRectMake(0, self.contentOffset.y, selectedView.frameWidth, 460)];
}completion:^(BOOL finished){
[self.visibleViewControllers_ enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
UIViewController *viewController = (UIViewController *)obj;
NSLog(#"VIEW CONTROLLER Y IS %f AT INDEX %d", viewController.view.frameY, viewController.view.tag);
}];
}];
Basically it's a dictionary of view controllers that it's view I want to animate, but what's weird is that it only performs one animation. Not all. Why is this? Is it possible to do enumeration inside an animation block?

Answer 1

enumerate your views and animate them in your enumeration
[self.visibleViewControllers_ enumerateKeysAndObjectsUsingBlock:^
[UIView animation.....
you did one animation and enumerate all view in this animation. just turn it around

Answer 2

Have you tried something like this:
- (void) startAnimationLoop {
keyIndex = 0;
keysToLoopThrough = [self.visibleViewControllers_ allKeys];
[self animate];
}
- (void) animate {
UIViewController *viewController = [self.visibleViewControllers_ objectForKey:[keysToLoopThrough objectAtIndex:keyIndex]];
[UIView animateWithDuration:3.0 animations:^{
if (viewController.view.tag != index){
if (viewController.view.tag < index){
NSLog(#"LOWER VIEW WITH TAG %d", viewController.view.tag);
[viewController.view setFrameY:self.contentOffset.y - viewController.view.frameHeight];
} else if (viewController.view.tag > index){
NSLog(#"UPPER VIEW WITH TAG %d", viewController.view.tag);
[viewController.view setFrameY:600];
} else {
[viewController.view setFrame:CGRectMake(0, self.contentOffset.y, selectedView.frameWidth, 460)];
}
}
}completion:^(BOOL finished){
keyIndex++;
if (keyIndex < [keysToLoopThrough count])
[self animate];
else NSLog("Finished");
}];
}