Access object from container view controller

Question

Below is shown navigation stack.

UIViewController -> UIContainerViewController -> UINavigationViewController -> UIPageViewController -> UIViewController

The parent view (First view controller) contains a button and child view (Last view controller) contains UITextField.

What I want to do is that when I press the button in parent view, the text from the child view text field should be stored in a NSString object in parent view.

What I tried is:

ChildViewController *CV = [self.childViewControllers lastObject]

ChildViewController *CV = [self.storyboard instantiateViewControllerWithIdentifier:@"ChildViewController"]

None of the above working.

Thanks in advance.

MudOnTire · Accepted Answer · 2016-04-02 05:56:23Z

1

Use notifications, since the relationships between controllers are hard to handle, when you press the button post a buttonPressed notification and when the child VC received the notification post a needToStoreString notification and put the string in notification's userInfo and so the parent VC can know.

answered Apr 2, 2016 at 5:56

MudOnTire

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1 Comment

Alex Cio Over a year ago

Notifications can help and aren't a bad way to communicate between objects, but I wouldn't do it on everything. And at least you have delegates to communicate ...

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