"NSOffState" not available in Swift "

Question

I have an NSView extension with a simple function called clearControllersInView (), which takes all the controllers in the view and sets them to the default value (i.e. check boxes for pop-ups, pop-ups and combos for the first menu item, text fields for empty lines ) I had no problems with this in Swift 3.

I use the current beta version of Xcode 9 and upgrade this extension to Swift 4. The problem is in the section processing flags, where I get the error "NSOffState" is not available in Swift "when trying to install checkbox for NSOffState:

if item is NSButton {
    let checkbox = item as? NSButton
    checkbox?.state = **NSOffState**  -- *'NSOffState' is unavailable in Swift*
}

I got the same error elsewhere in this program where I check the value of a checkbox. I was able to temporarily fix these instances by checking the raw control value: if checkbox.state == NSOnState - error
  if checkbox.state.rawValue == 1 - no error

Could not find a solution by doing a search here or Google in general. Any help would be greatly appreciated!

Answer 1

First ⌥-clickon stateyou will see

The type has statebeen changed to NSControl.StateValue, which is clearly an enumeration or structure.

So just enter .and use code completion

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PS: if item is NSButtonyou can safely write

let checkbox = item as! NSButton

if let checkbox =  item as? NSButton { ...