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Using the ColorPanel in the NSToolbar in Swift

I just started learning swift and I am trying to create an app that changes the color of the background based on the color selected in the NSColorPanel in the NSToolbar.

Toolbar Colors

When clicking on Colors I am faced a Color Palette. Now what I can't figure out is how to extract/read the Color Codes in Swift.

I have looked all over the internet but unfortunately nothing was helpful.

Hopefully someone here can provide with more information.

Solution

  • First you need to add an observer for when the color panel has changed colors.

    NotificationCenter.default.addObserver(self, selector: #selector(colorPanelDidChange(_:)),
                         name: NSColorPanel.colorDidChangeNotification, object: nil)

    where colorPanelDidChange is your custom method: 

    @objc func colorPanelDidChange(_ notification: NSNotification)

    In this method, you extract the content of the notification:

    if let cp = notification.object as? NSColorPanel

    and now you can do cp.color to get the actual color the user has clicked on.