removeFromSuperview is not working if it is called from another class - ios

Question

I have one main view as shown in picture. I add 2 subviews into that and each has their own view controller.
In ipadMainViewController,
self.dTVC= [[dialoguesTableViewController alloc] initWithNibName:#"dialoguesTableViewController" bundle:nil];
[self.dTVC.view setFrame:rectFordTVC];
[self.view addSubview:self.dTVC.view];
After that, I want to remove the view of dialoguesTableViewController if I press a button in CategoriesViewController. But, I can't remove it.
In CategoriesViewController, I write like this but dialoguesTableViewController can't be removed from ipadMainViewController. How shall I do this?
In CategoriesViewController, I write code like this but it is not working.
self.dTVC= [[dialoguesTableViewController alloc] initWithNibName:#"dialoguesTableViewController" bundle:nil];
[self.dTVC.view removeFromSuperview];

Answer 1

So there are few ways how to do it:
First way:
Add observer to ipadMainViewController initialization method or viewDidLoad method it depends on your needs.
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(buttonPressed)
name:#"kNotificationDidPressedButon"
object:nil];
Add -buttonPressed method to ipadMainViewController controller for removing your view or other your purposes.
- (void)buttonPressed
{
// remove view here
}
in the CategoriesViewController in the method where you tap on the appropriate button add this code:
[NSNotificationCenter defaultCenter] postNotificationName:#"kNotificationDidPressedButon"
object:self];
Second way:
Add delegate property to CategoriesViewController. you can find info how to make delegate for example here: link
Third way:
Use objective-c blocks
Initial advice as for beginner:
I suggest you to start from first way, because it is most simplest for understanding. Also you have to remove observer in ipadMainViewControllerr in -dealloc or -viewWillDisapper method, it depends of where you have add observer e.g. in -init method or in -viewDidLoad or -viewWillAppear callback;
[[NSNotificationCenter defaultCenter] removeObserver:self];

Answer 2

try this....
add below code where you can remove view
-(void)viewDidLoad{
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(removeFromSuperview) name:#"REMOVE" object:nil];
}
-(void)removeFromSuperviev{
[view removeFromSuperview];
}
add below code form you need to remove
[[NSNotificationCenter defaultCenter] postNotificationName:#"REMOVE" object:nil];