Click through NSView

Question

I have an NSView containing multiple subviews. One of those subviews is transparent and layered on top.

I need to be able to click through this view dow

Answer 1

Here's a Swift 5 version of figelwump's answer:

public override func hitTest(_ point: NSPoint) -> NSView? {
    // pass-through events that don't hit one of the visible subviews
    return subviews.first { subview in
        !subview.isHidden && nil != subview.hitTest(point)
    }
}