CODEWITHSUNDEEP
iosswift
Max
Max

Reputation: 15955

Unwind segue unwinds too far

I am using some navigation controllers and my structure looks like this:

Top Nav ---Modal---> Middle Nav ---Model---> Bottom Nav

and

Top Nav ---Model---> Bottom Nav

In English, one navigation controler (Top Nav) presents another navigation controller modally (Middle Nav), which in turn presents another navigation controller modally (Bottom Nav). The Button Nav has a bar button that exits the view and performs an unwind action. The unwind action lives in Top Nav. Bottom Nav is reachable directly from both Middle Nav and Top Nav. The issue is that when I hit the bar button in Bottom Nav it always unwinds to Top Nav, even if I reached the view from Middle Nav. How can I debug / fix this?

My initial thought is that the navigation view unwinds to the controller that handled the unwind. Does this mean I need to copy the unwind method in both controllers?

Upvotes: 1

Views: 157

Answers (1)

Martin R
Martin R

Reputation: 539685

Yes, this is documented in Technical Note TN2298 – Using Unwind Segues:

How an Unwind Segue Determines its Destination View Controller

When an unwind segue is initiated, it must first locate the nearest view controller in the navigation hierarchy which implements the unwind action specified when the unwind segue was created. This view controller becomes the destination of the unwind segue. If no suitable view controller is found, the unwind segue is aborted.

Upvotes: 1

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