setView with ChildViewController - ios

Question

I have ViewController with child, it's works great, but when I change root view to another, and then return back the root view:
-(void)showSearchResultView
{
self.searchView.frame = self.view.frame;
__rootView = self.view;
[self setView:self.searchView];
}
-(void)hideSearchResultView
{
if(__rootView) [self setView:__rootView];
__rootView = nil;
}
I'm getting the exception:
Terminating app due to uncaught exception 'UIViewControllerHierarchyInconsistency',
reason: 'child view controller:<SlideViewController> should have parent view controller:
<UINavigationController> but actual parent is:<MainViewController>'
What is the proper way to change root view with child view controllers?

Answer 1

For changing root view you have to remove rootviewcontroller from navigation stack.
Like :
NSMutablerray *controllers = [self.navigationController viewcontrollers];
[controllers removeObjectAtIndex:0];
it will remove the rootviewController and name way you can add new view Controllers.
[controllers addObjectAtIndex:0];
Note:- This code syntax might be incorrect .this is just a approach.
Update:-
NSMutableArray *viewControllers = [[NSMutableArray alloc]initWithArray:self.navigationController.viewControllers];
RootViewController *root = [[RootViewController alloc]initWithNibName:#"RootViewController" bundle:nil];
[viewControllers insertObject:root atIndex:0];
self.navigationController.viewControllers = viewControllers;
This way you can change your root view.

Answer 2

I found the solution. Just remove the children root views and add it again.
-(void)showSearchResultView
{
self.searchView.frame = self.view.frame;
__rootView = self.view;
[self setView:self.searchView];
for(UIViewController* vc in self.childViewControllers){
[vc.view removeFromSuperview];
}
}
-(void)hideSearchResultView
{
if(__rootView) [self setView:__rootView];
__rootView = nil;
for(UIViewController* vc in self.childViewControllers){
vc.view.frame = self.view.bounds;
[self.view addSubview:vc.view];
}
}