UINavigationController pop to another root controller

Question

I have 3 View Controllers. The first 2 view controllers are embedded in UINavigationController, as shown in the screenshot:

The starting point is at View Controller 1's UINavigationController. Then, I push to View Controller 3. However, I would like it to pop to the root of UINavigationController containing View Controller 2. How can I change the navigation hierarchy?

• need to keep the popping animation
• i know changing root view controller is a way to achieve, but this will be very odd in user experience

p.s. this storyboard is simplified for illustration purpose; they are many view controllers in between View Controller 1, 2 and 3.

Answer 1

I end up changing the entire UINavigationController hierarchy with the following codes:

// In the View Controller 3's button's `IBAction`:
NSArray *vcs = @[[self.storyboard instantiateViewControllerWithIdentifier:@"NavController1_Identifier"], self];
[self.navigationController setViewControllers:vcs];
[self.navigationController popToRootViewControllerAnimated:YES];

where NavController1_Identifier is the first UINavigationController's storyboard identifier.

---

Seems unwind segue can be used in this case too.