Multiple UIViews in animation - ios

Question

I'm trying to create sort of a slide-out slide-in motion for my views when the user presses the forward or backwards button.
I made the first view slide out just fine, but the second one just won't slide in.
Here's my code:
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDelay:0.1];
[UIView setAnimationDuration:0.7];
UIView *currentView = [[contentScrollView subviews] objectAtIndex:0];
currentView.center = CGPointMake(contentScrollView.frame.size.width+contentScrollView.frame.size.width/2, currentView.center.y);
UIView *newView = [[contentScrollView subviews] objectAtIndex:1];
newView.center = CGPointMake(newView.center.x+newView.frame.size.width, newView.center.y);
[UIView commitAnimations];
I don't really see what the problem is, it should work. But the currentView just slides out, and the newView is still out in the -x values, hidden from the user.
I already tried changing to transformations, but that didn't do anything.
What could cause this?

Answer 1

Try this code (tested):
Copy and paste it to see it in action and adjust the frames for your views to suit your needs.
UIView *viewOne = [[UIView alloc] initWithFrame:(CGRect){{0, 0}, 200, 200}]; //currentView
UIView *viewTwo = [[UIView alloc] initWithFrame:(CGRect){{200, 0}, 200, 200}]; //newView
viewOne.backgroundColor = [UIColor lightGrayColor];
viewTwo.backgroundColor = [UIColor darkGrayColor];
[self addSubview:viewOne];
[self addSubview:viewTwo];
[UIView animateWithDuration:5.0f delay:0.0f options:UIViewAnimationOptionCurveEaseInOut animations:^
{
viewOne.frame = (CGRect){{300, 0}, 200, 200};
viewTwo.frame = (CGRect){{-100, 0}, 200, 200};
} completion:^(BOOL finished) {
}];
This is to show you how these two view sliding in and out.
You have to adjust the frames for your views accordingly to your needs.