Swift iOS- Trigger action when SplitViewController's displayModeButtonItem is tapped

Question

I have a SplitViewController and I'm implementing:

myNavVC?.topViewController?.navigationItem.leftBarButtonItem = splitViewController?.displayModeButtonItem
myNavVC?.topViewController?.navigationItem.leftItemsSupplementBackButton = true

I use it to display the expand button on the view controller when the iPhone 6 Plus or 7 Plus is in .regular orientation. I would like to trigger an action when the button is touched. How I do this?

Rajmund Zawiślak · Accepted Answer · 2017-05-28T08:50:32.453

1

Simply set action on button.

myNavVC?.topViewController?.navigationItem.leftBarButtonItem.action = #selector(foo)

Also you need to set the target, the object with receive the action. Probably it would be self in your case.

myNavVC?.topViewController?.navigationItem.leftBarButtonItem.target = self

edited May 28 '17 at 08:50

answered May 27 '17 at 15:08

Rajmund Zawiślak

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thanks I'm going to try it later and get back to you! :) – Lance Samaria May 27 '17 at 16:42
thanks but it didn't work. crash > "unrecognized instance sent to selector" – Lance Samaria May 28 '17 at 00:03
You need to set a [target](https://developer.apple.com/reference/uikit/uibarbuttonitem/1617154-target) – Rajmund Zawiślak May 28 '17 at 08:51

Swift iOS- Trigger action when SplitViewController's displayModeButtonItem is tapped

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