ios - UISplitViewController: how to go back from Detail to Master -

i using uisplitviewcontroller implement master/detail flow app.

i not using navigation controller.

to go masterviewcontroller detailviewcontroller using: performseguewithidentifier("showdetail", sender: self)

what should use go detailviewcontroller masterviewcontroller?

i found simple solution using unwind action.

in mastercontrollerview add code:

@ibaction func backfromdetail(segue: uistoryboardsegue) {     print("back") } 

using interfacebuilder, create custom button inside detailviewcontroller, , connect exit icon (as explained here) selecting "backfromdetail".

after this, works magically! click on custom button go master.