Swiftpack.co - Package - ChimeHQ/NicerTouchBar

Github CI Carthage compatible


NicerTouchBar includes useful utilities for NSTouchBar/NSTouchBarItem validation, as well as some convenience methods for influencing NSTouchBar behavior/setup.


While we have NSMenuItemValidation and NSUserInterfaceValidations, as of 10.15, NSTouchBar doesn't have a good validation system. This library introduces a TouchBarItemValidations protocol, which is checked first during the touch bar validation process. As a fallback, NSUserInterfaceValidations is checked if appropriate.

public protocol TouchBarItemValidations {
    @available(OSX 10.12.2, *)
    func validateTouchBarItem(_ item: NSTouchBarItem) -> Bool

Validation is NSTouchBarItem-subclass dependent. Currently, NSGroupTouchBarItem and NSPopoverTouchBarItem are supported. NSCustomTouchBarItem is supported if its view property is a subclass of NSControl.

Triggering Validation

Because this validation isn't provided by the system, you have to do some work to wire it up. You can just use the validate method on NSTouchBar directly. This is manual, but can be efficient, especially if your validation needs are simple.

A fancier way is to hook into NSWindow/NSApplication's didUpdateNotification. This gives you a easy way to run your validation automatically as the window/app processes events.

And, as a convenience, there are a few functions/extensions that make it easier to manually validate.

class MyViewController: NSViewController {
    func myFunction() {
        // this can be called safely before 10.12.2
        // or (cannot be called before 10.12.2)

Overriding a Window's TouchBar

It sometimes happens that you need to override a window's default touch bar. Instead of messing with binding, you can use a handy extension on NSViewController.

deinit {

override func viewWillAppear() {




You can use Carthage to intall this as a static library. However, because the library relies on Objective-C categories to extend AppKit classes, you must include "-ObjC" in your OTHER_LDFLAGS setting.

github "ChimeHQ/NicerTouchBar"

Swift Package Manager:

dependencies: [
    .package(url: "https://github.com/ChimeHQ/NicerTouchBar.git")

Suggestions or Feedback

We'd love to hear from you! Get in touch via twitter, an issue, or a pull request.

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.


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v1.0.4 - 2019-10-31 13:33:57

  • Small documentation improvements
  • Lots of project infrastructure work

v1.0.3 - 2019-06-02 00:03:44

  • Support for SwiftPM
  • Expanded comments
  • Swift 5

v1.0.2 - 2019-02-25 16:50:12

Move validations up from NSViewController to NSResponder

v1.0.1 - 2019-02-19 18:32:48

Adds a new validation extension for NSViewController

v1.0 - 2018-12-17 12:39:51

First release