presentingView2.swift

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "tag_table" {
            let controller = segue.destinationViewController as! BudgetTagsTableViewController
            //-- Pass in what we have as the selected tags
            controller.selectedTagIDs = self.selectedTagIDs
            
            //-- Closure to receive the selection list and create our tags_string
            controller.onCloseSelectedTags = { [unowned self] tags in
                self.selectedTagIDs = Set( tags.map { (tag) -> Int in tag.id } )
                
                if self.selectedTagIDs.count > 0 {
                    let tag_strings = tags.map { (tag) -> String in
                        return tag.name
                    }
                
                    self.tags_string.next(tag_strings.joinWithSeparator(", "))
                }
                else {
                    self.tags_string.next("(None)")
                }
            }
        }
    }
}