Alternative to add subview everytime app does addChildViewController - ios

Question

We have a viewcontroller which has two modes of view - list and map.
Earlier we were doing the toggle by using our custom tabcontroller. But now, as we didnt want to show tabs and do some more things, we are doing it by adding childviewcontrollers.
But there are few subviews which are common in both child view, like filters.
So, this is how we are doing it now:
- (void)switchView:(UIButton *)sender {
if(!self.mapVisible) {
self.mapVisible = YES;
_mapViewController.view.frame = self.view.bounds;
[self addChildViewController:_mapViewController];
[_listViewController willMoveToParentViewController:nil];
[self transitionFromViewController:_listViewController
toViewController:_mapViewController
duration:0.7
options:UIViewAnimationOptionTransitionFlipFromLeft
animations:nil
completion:^(BOOL done){
[_mapViewController didMoveToParentViewController:self];
[_listViewController removeFromParentViewController];
[self setupFooterAfterFlip];
}];
} else {
self.mapVisible = NO;
_listViewController.view.frame = self.view.bounds;
[self addChildViewController:_listViewController];
[_mapViewController willMoveToParentViewController:nil];
[self transitionFromViewController:_mapViewController
toViewController:_listViewController
duration:0.7
options:UIViewAnimationOptionTransitionFlipFromRight
animations:nil
completion:^(BOOL done){
[_listViewController didMoveToParentViewController:self];
[_mapViewController removeFromParentViewController];
[self setupFooterAfterFlip];
}];
}
}
We call the switchview method every time we toggle between views. As you can see, we are setting up the footer everytime from scratch. Is their a more efficient way so that self.view keeps the footer and only toggles between listview and mapview?

Answer 1

I figured out a possible solution. Rather than calling the method setupFooterAfterFlip every time, and creating filters from scratch, I just gave filters a tag id. Now, every time user toggles the view, I remove filters from superview and add it again to new view.
// remove footer
UIView *footer = (UIView *)[self.view viewWithTag:22];
[footer removeFromSuperview];
//change view, write some code, add footer again
[self.view addSubview:footer];