CODEWITHSUNDEEP
iphoneobjective-cuiviewsubview
Pavan
Pavan

Reputation: 18498

remove 2 subviews in one go

I am trying to remove two viewcontrollers (that have been added on top of each other) with one method. I have made the views in interfacebuilder. they all have their own .h and .m files to go with it.

Scenario I am in:

I have a main menu which has the view2 header file imported. In a method I add the second view on top of the superview like so

view2ViewController * view2 = [[view2ViewController alloc] initWithNibName:@"view2ViewController" bundle:nil];
[self.view addSubview:view2.view];

then in view 2 I have added the view 3 header file so i can add view 3 as a subview ontop of view2. i have another method which is connected again to interface builder to a UIButton so upon button press a method gets called in view2 which adds view 3 on top in exactly the same way like so:

view3ViewController * view3 = [[view3ViewController alloc] initWithNibName:@"view3ViewController" bundle:nil];
[self.view addSubview:view3.view];

What im trying to solve: I have a button in view 3 which should remove view 3.... and then it should also remove view 2 aswell so the main screen is visible.

How can this be achieved?

What I have so far:

[self.view removeFromSuperview];

This however only removes View 3... but leaves view 2 in place.

What needs to be modified so that i can remove view 2 as well??

Any help is appreciated.

Upvotes: 1

Views: 619

Answers (3)

Marco Masser
Marco Masser

Reputation: 1086

I don't know what you're trying to do exactly, but I get the impression that pushing a new view controller is what you want. If you have a UINavigationController in your app, you'd just have to do a

[navigationController pushViewController:view2 aimated:YES]

To go back to the main menu when the button is pressed, you should define a delegate protocol that looks something like this::

@protocol View3ViewControllerDelegate
- (void)view3ControllerBackToMainMenuButtonPressed:(View3ViewController*)controller;
@end

This protocol is then implemented by the class that actually pushes the other view controllers. In the implementation, you'd pop all view controllers you don't want to be displayed anymore. To do this, you could use

[navigationController popToViewController:myMainMenuViewController animated:YES]

or if your main menu view controller is actually the root view controller:

[navigationController [navigationController popToRootViewControllerAnimated:YES]

That way only one class is responsible for pushing and popping all view controllers and handling that "Back to Main Menu" button. Using a custom protocol as described above is the recommended way to handle the popping of pushed view controllers in a scenario like this.

Hope that helps!

Upvotes: 0

Altealice
Altealice

Reputation: 3572

I would normally do this as adding view2 and view3 as subviews of the main view. Then when the button actions are triggered, the adding and removing of subviews will be executed by the main view's view controller.

For a quick hack, I think you can try this in your button handler.

[self.view removeFromSuperview];
[self.view.superview removeFromSuperview];

Though I'm not sure if you should be doing it. :P

Upvotes: 1

Di Wu
Di Wu

Reputation: 6448

Is this what you need?

    [[[self.view subviews] makeObjectsPerformSelector:@selector(removeFromSuperview)];

Upvotes: 0

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