(Mac) Panel Re-size issue

I've created an application for Mac that uses a horizontal resize view (technically a BWToolkit resize view) that is linked to a toggleCollapse button. After collapsing and expanding the panel a few times, this happens (see image) right table-view should be flush with panel divider. Any one have any info on why this is happening. I've carefully adjusted my alignmen开发者_JAVA百科t and anchors to be correct but it seems like this is a weird issue that bugs out the view?

EDIT: Is anyone NOT having this issue? Any input would be helpful! Maybe I just need to start fresh?

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This is a known bug in BWSplitView itself, and is related to how view animation and timers interact in that view. The details are covered here:

http://bwalkin.lighthouseapp.com/projects/36323/tickets/34-split-view-doesnt-resize-subview-properly-during-a-toggle-uncollapse-after-manual-collapse

Basically, before the view is animated, autoresizesSubviews is unset, so that the view can be collapsed/expanded without affecting the contents; a timer is then scheduled to restore the autoresizesSubviews property for when the animation has completed. But (of course) the animation may sometimes finish ever so slightly earlier, or later, than the scheduled timer fires; so autoresizing is switched on before the animation has completed, resulting in a few pixels resize. As you've probably seen, the subviews tend to move around a bit as the view is collapsed and uncollapsed.

The "full" fix for this would be to restore autoresizing when the CAAnimation has completed using a callback, but this hasn't been implemented yet. However, in that thread "Robert Payne" has posted a version of BWSplitView.m which uses a slightly different approach - the view sizes are recorded before collapsing, and restored after expanding. I applied this patch myself (I think it won't compile at first - but it's a simple matter of an undeclared variable?) and can confirm it does fix the problem.

Let me know if you'd like a BWSplitView.m which compiles successfully, or a copy of the compiled framework.