how can i access a parent view controller's view from a child view controller?

Question

I have a main view controller that takes care of the drawing for my 2D opengl ES view, and a child view controller buttonManager that determines what buttons to load and draw during launch.

Once the user presses on one of these buttons, this view controller is created and its view is supposed to come up, but the view never gets added but has been tested to work. Heres my code from the main view controller:

 buttonManager=[[ButtonManager alloc] init];
 [self addChildViewController:buttonManager];
 [self.view addSubview:buttonManager.view];

and heres my code to launch this view:

-(void)launchStopDialog: (NSString*)stopName {
    NSLog(@"stopdialog should be launched.");
    if (stopDialogController == nil)
        stopDialogController = [[StopDialogController alloc] initWithNibName:@"StopDialog" bundle:nil];
    if (stopDialogController)
        [stopDialogController presentWithSuperview:self.view.superview withStopName:stopName]; 
}

score 45 · Accepted Answer · edited Jun 21 '16 at 13:43

45

To access the parent View controller you can use self.parentViewController. Once you have it you can access its view simply by using its view property

edited Jun 21 '16 at 13:43

mojuba

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answered Jan 19 '12 at 20:26

aqs

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24

14

In Swift 3.0 use `self.parent` "Yeah! Swift 3.0, %$^%!" (c) Breaking Bad – Aleksey Potapov Dec 11 '16 at 14:07
2

@aqs : why is self.parent *nil* in ViewDidLoad ? – Kashif Feb 07 '17 at 20:06
@Kashif, just check the next answer. – Hola Soy Edu Feliz Navidad Mar 07 '17 at 16:10

score 29 · Answer 2 · answered Feb 05 '14 at 03:49

29

Note to those using iOS 5.x+

self parentViewController now returns nil. You will now have to use self presentingViewController to achieved the same result. See this blog post for more information and additional work arounds for upgrading your code base: http://omegadelta.net/2011/11/04/oh-my-god-they-killed-parentviewcontroller/

answered Feb 05 '14 at 03:49

Jeremy C.

640
6
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1

The link isn't broken for me. – Hola Soy Edu Feliz Navidad Mar 07 '17 at 16:09

score 4 · Answer 3 · answered Jul 26 '17 at 10:14

4

Now after they have killed the

self.parent

you can use

override func didMove(toParentViewController parent: UIViewController?)
{        
}

answered Jul 26 '17 at 10:14

Mohamed Hashem

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Not sure if it is because I'm creating the child view programmatically or the `self.parent` or `self.presentingViewController` no longer work, but the `didMove` method was the only solution that worked for me. (And that I'm calling the `childViewController.didMove(toParentViewController: self)` when adding the child view) – Jose Mar 20 '18 at 18:51

score 3 · Answer 4 · edited Apr 01 '20 at 04:46

3

here's what worked for me:

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    NSString * segueName = segue.identifier;
    if ([segueName isEqualToString: @"child-view"]) {
        ChildViewController * childViewController = (ChildViewController *) [segue destinationViewController];
        [self addChildViewController:childViewController];
    }
}

edited Apr 01 '20 at 04:46

pkamb

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answered Aug 31 '15 at 09:48

nahlamortada

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score 0 · Answer 5 · answered Jul 31 '18 at 14:02

0

I accomplish this using the objective c blocks approach. Take a look at this blocks tutorial. https://www.youtube.com/watch?v=FS4JAy1Wy3w

answered Jul 31 '18 at 14:02

Alfredo Papirriqui

61
3

how can i access a parent view controller's view from a child view controller?

5 Answers5

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