Yep, known issue, fixed in Xcode 9 beta 3 according to the release
notes. Hugely annoying, but comment out the extension, connect the outlet, and
comment it back it and should work fine.
Jon
> On Jul 14, 2017, at 11:51 PM, David Baraff via swift-users
> <swift-users@swift.org> wrote:
>
> TL;DR
> Add an extension to UISlider and interface builder in xcode will no longer
> believe it has *any* actions.
> Is this a known issue?
>
>
> 1. I added a UISlider to a storyboard in xcode. I right clicked on it, and
> saw the usual set of things, particularly, actions (sent events):
>
> <PastedGraphic-1.tiff>
>
> Next, I wrote this:
>
> public protocol ModelDataValuedUIControl: class {
> var xxcontrolValue:Any {
> get set
> }
> }
>
> extension UISlider : ModelDataValuedUIControl {
> public var xxcontrolValue:Any {
> get {
> return self.value
> }
>
> set(newValue) {
> self.value = newValue as! Float
> }
> }
> }
>
>
> Lo and behold, after compiling, interface builder *hates* sliders, because
> now the rightclick menu looks like this:
> <PastedGraphic-2.tiff>
>
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