Xcode 8.2.1, Swift 3.0.2, macOS 10.12 I have an NSSplitViewController that has 3 panes (please note the NS; this is for a Mac app). I'm trying to set the left-most pane to always have a fixed wid...

Hi I've seen this question asked a few times already but with no definite answer yet so I created it for xcode 7 and swift2 (which may have changed things a bit anyway). I created a project using ...

Almost all macOS official apps have this toolbar's feature which the NSToolbarItem flexible space is constraint to NSSplitViewItem view. I first thought maybe there are 3 different sections on NS...

Finder and Notes have a peculiar behaviour that I am seeking to reproduce. The ‘flexible space’ in the NSToolbar seems to take the dimensions of the split view into account. For instance, the first...

I have a NSSplitViewController in which first viewcontroller displays a table and second viewcontroller should display a viewcontroller from a list of viewcontrollers based on the selection of tabl...

I have this app that uses a NSSplitViewController as the root and has a NSTabViewController connected as its detailViewController. This app is set to launch at 1024x768. The left pane should launc...