Shift to Parent View Controller from child view controller - iOS

Question

I have a main Actions View Controller, and on that there is button "Review". Review Button's functionality is :

 - (IBAction)btnReview:(id)sender
{
    ReviewViewController *vc = [[ReviewViewController alloc]initWithNibName:@"ReviewViewController" bundle:nil];
    [self addChildViewController:vc];
    [vc didMoveToParentViewController:self];
    [self.view addSubview:vc.view];
}

Now on Review Page, I have a button. And on that button's action, I want to switch back to Parent View Controller. Its view should be displayed. I have tried following code, it either pauses or crashes application.

[self didMoveToParentViewController:nil];
[self.view removeFromSuperview];
[self removeFromParentViewController];

I even tried:

[self dismissModalViewControllerAnimated:YES]

I have read other posts related to this question as well but could not find a satisfactory answer. Please Help!

Not sure if that's the problem here, but you shouldn't have to call `didMoveToParentViewController:` with a `nil` parameter, `removeFromParentViewController` should call that automatically after the view controller was removed. — omz, Apr 30 '13 at 06:12
even if I remove [self didMoveToParentViewController:nil];, it still pauses the application and later on crashes. — user2334616, Apr 30 '13 at 06:16

score 3 · Answer 1 · answered Aug 18 '13 at 12:44

I'm assuming that this is a custom viewcontroller container you're trying to build, "self" is the Main Actions viewController you're talking about.

Try this:

- (IBAction)btnReview:(id)sender
{
    ReviewViewController *vc = [[ReviewViewController alloc]initWithNibName:@"ReviewViewController" bundle:nil];

    [self addChildViewController:vc];

    [self.view addSubview:vc.view];

    [vc didMoveToParentViewController:self];

    vc = nil;

}

For the "Back" button, I'm assuming this is the Button to return to Main Actions viewController from the Review viewController, try this:

- (IBAction)btnReviewHide:(id)sender
 {

    [self willMoveToParentViewController:nil];
    [self.view removeFromSuperview];
    [self removeFromParentViewController];

 }

Hope this helps.

Levi · Answer 2 · 2013-04-30T07:31:51.353

You should use delegation. When you click the button in your ReviewViewController, you call a method like: [self.delegate hideReviewController:self];

And this method would look something like:

- (void)hideReviewController:(ReviewViewController *)controller {
                [UIView animateWithDuration:0.3
                                  delay:0
                                options:UIViewAnimationOptionCurveEaseInOut
                             animations:^{
                                  controller.view.alpha = 0;
                             } completion:^(BOOL finished) {
                                  [self.view removeSubview:controller.view];
                                  // If you want the Review Controller to be deallocated:
                                  [self removeChildViewController:controller];
                             }];
}

EDIT: In your ReviewDelegate.h file add:

@class ReviewViewController;

@protocol ReviewDelegate <NSObject>
- (void)hideReviewController:(ReviewViewController *)controller;
@end

Then add this property:

@property (nonatomic, weak) id <ReviewDelegate> delegate;

In the parent class:

 - (IBAction)btnReview:(id)sender
{
    ReviewViewController *vc = [[ReviewViewController alloc]initWithNibName:@"ReviewViewController" bundle:nil];
    vc.delegate = self;
    [self addChildViewController:vc];
    [vc didMoveToParentViewController:self];
    [self.view addSubview:vc.view];
}

    - (void)hideReviewController:(ReviewViewController *)controller {
                    [UIView animateWithDuration:0.3
                                      delay:0
                                    options:UIViewAnimationOptionCurveEaseInOut
                                 animations:^{
                                      controller.view.alpha = 0;
                                 } completion:^(BOOL finished) {
                                      [self.view removeSubview:controller.view];
                                      // If you want the Review Controller to be deallocated:
                                      [self removeChildViewController:controller];
                                 }];
    }

I also suggest that you read about delegation

score 2 · Answer 3 · answered Jan 16 '14 at 06:18

2

Try this

self.view=nil;
[self willMoveToParentViewController:nil];
[self.view removeFromSuperview];
[self removeFromParentViewController];

answered Jan 16 '14 at 06:18

Balaji Sankar

41
1

Vineet Singh · Answer 4 · 2013-04-30T06:37:03.337

1

You don't need to make it complex... Just use UINavigationController.

To navigate from ParentVC to ChildVC :

  ChildViewController *ChildVC = [[ChildViewController alloc]initWithNibName:@"ChildViewController" bundle:nil];
[self.navigationController pushViewController:ChildVC animated:YES];

And for navigating back from ChildVC to ParentVC :

ParentViewController *ParentVC = [[ParentViewController alloc]initWithNibName:@"ParentViewController" bundle:nil];

[self.navigationController popViewControllerAnimated:YES];

edited Apr 30 '13 at 06:37

answered Apr 30 '13 at 06:17

Vineet Singh

4,775
1
28
39

Navigating from ParentVC to ChildVC is working fine, but crashes when navigating back from ChildVC to ParentVC. – user2334616 Apr 30 '13 at 06:27
Have you implemented 'pushViewController:' for navigation from ParentVC to ChildVC???? – Vineet Singh Apr 30 '13 at 06:30
Have you implemented `UINavigationControllerDelegate` in your interface file of your parentVC as well as in ChildVC. – Vineet Singh Apr 30 '13 at 06:36

score 1 · Answer 5 · answered Apr 30 '13 at 07:03

Since you are adding the Child View as a Subview on to Parent you need to manually it from its superview (in your case parentview). Rather then adding it as a subview you can make use of presentViewController method as follow:

 - (IBAction)btnReview:(id)sender
  {

   ReviewViewController *vc = [[ReviewViewController alloc] initWithNibName:@"ReviewViewController" bundle:nil];
   [self presentViewController:vc
                      animated:YES
                    completion:nil];
  }

and in the child class code for back button will be :

  -(IBAction)backButtonClicked:(id)sender
  {
      [self dismissViewControllerAnimated:YES completion:nil];
  }

score 0 · Answer 6 · answered Apr 30 '13 at 06:13

0

Sounds like what you're looking for could be taken care of with a UINavigationController. Just use pushViewController: to push the new view onto the screen. Then, a back button will appear in the navigation bar atop the view, which can be used to return to the "parent" view controller.

See the documentation.

answered Apr 30 '13 at 06:13

The Kraken

3,087
5
25
65

No, I am not using UINavigationController, as my application is Tab based. – user2334616 Apr 30 '13 at 06:14
See Levi's answer above, then. – The Kraken Apr 30 '13 at 06:20

score 0 · Answer 7 · edited May 20 '16 at 12:00

0

writing only

- (IBAction)backbutton:(id)sender {
    [self.navigationController popToRootViewControllerAnimated:YES];
}

worked in my case

edited May 20 '16 at 12:00

Ingo Karkat

154,018
15
205
275

answered May 20 '16 at 11:38

ghoshghosh

166
1
1
9

Shift to Parent View Controller from child view controller - iOS

7 Answers7