Another solution

Cocoa Programming for OS X (5th Edition) 5. Controls
1

[code]class MainWindowController: NSWindowController {

enum TicksButton {
    case showTicksBtn
    case hideTicksBtn
    init?(tagValue: Int) {
        switch tagValue {
            case 0:  self = .showTicksBtn
            case 1:  self = .hideTicksBtn
            default: return nil
        } // end switch
    }
}

// MARK: - Properties
let noTickMarks     = 0
let allTickMarks    = 10

var sliderValue     = 0.0

override var windowNibName: String? {
    return "MainWindowController"
}

// MARK: - IBOutlets
// from left to right
@IBOutlet weak var vSlider:         NSSlider!
@IBOutlet weak var sliderStatus:    NSTextField!
@IBOutlet weak var showTicks:       NSButton!
@IBOutlet weak var hideTicks:       NSButton!
@IBOutlet weak var checkBox:        NSButton!
@IBOutlet weak var secretText:      NSTextField!
@IBOutlet weak var plainText:       NSTextField!

// MARK: - IBActions
// in a roughly left to right order

@IBAction func resetControls(sender: NSButton) {
    // Sender: the "Reset Controls" button
    // Action: call method to reset controls to initial states
    resetAllControls()
}

@IBAction func adjustSlider(sender: NSSlider) {
    // Sender: the vertical slider
    // Action: give message as to direction of change, with color (bonus!)
    let newValue = sender.doubleValue
    if newValue == sliderValue {
        sliderStatus.stringValue = "Slider stays same"
        sliderStatus.textColor = NSColor.blackColor()
    } else if newValue < sliderValue {
        sliderStatus.stringValue = "Slider goes down!"
        sliderStatus.textColor = NSColor.redColor()
    } else {
        sliderStatus.stringValue = "Slider goes up!"
        sliderStatus.textColor = NSColor.blueColor()
    }
    sliderValue = newValue
}

@IBAction func toggleTicks(sender: NSButton) {
    // Sender: the hide/show tick marks radio buttons
    // Action: hide or show the tick marks as indicated
    let ticksBtn = TicksButton(tagValue: sender.tag)
    if let validTicksBtn = ticksBtn {
        switch validTicksBtn {
            case .showTicksBtn: vSlider.numberOfTickMarks = allTickMarks
            case .hideTicksBtn: vSlider.numberOfTickMarks = noTickMarks
        } // end switch
    } // end if let
}

@IBAction func toggleCheckBox(sender: NSButton) {
    // Sender: the checkbox button
    // Action: toggle title of checkbox button
    checkBox.title = (sender.state == NSOnState) ? "Uncheck me" : "Check me"
}

@IBAction func revealSecretText(sender: NSButton) {
    // Sender: the "Reveal Secret Text" button
    // Action: show the secret text as plain text
    plainText.stringValue = secretText.stringValue
}

// MARK: --- Methods
override func windowDidLoad() {
    super.windowDidLoad()
    resetAllControls()
}

func resetAllControls() {
    // Purpose: reset all controls to initial states
    sliderValue                 = 0.0
    vSlider.numberOfTickMarks   = allTickMarks
    vSlider.doubleValue         = sliderValue
    
    showTicks.state             = NSOnState

    sliderStatus.stringValue    = ""
    sliderStatus.textColor      = NSColor.blackColor()
    
    checkBox.title              = "Check me"
    checkBox.state              = NSOffState
    
    secretText.stringValue      = ""
    plainText.stringValue       = ""
}

}
[/code]
My solution, for public consumption as it were. I may have over-engineered it slightly, especially in the toggleTicks func, but it works well.