MacOS Playground: How can change the background color?

Question

I\'m trying to change the background color of main view:

import AppKit
import PlaygroundSupport

class ViewController : NSViewController {
    override func load         


        

Answer 1

You just need to set your view wantsLayer property to true

let view = views[0] as! NSView
view.wantsLayer = true
view.layer?.backgroundColor = NSColor.blue.cgColor