NSSplitView and autolayout

Question

How should I use auto layout constrains inside NSSplitView subview?

My NSSplitView subview has 3 subview: topPane, tableCont

Answer 1

As much as I hate to disagree, but Auco's answer should't be voted highest. It is not in any way helpful in solving the problem with an adequate amount of work. In my opinion the NSSplitView was only ever a problem to those who didn't read the documentation well enough.

The actual solution to the problem mentioned here is fairly simple: Auto Layout introduced the new "Holding Priorities API" on NSSplitView. And as the documentation says: Setting lower values to the holding priority of a subview will make him more likely to take width earlier. All of this can be set in IB and programmatically without any despair. The amount of work needed: 20 seconds approx.