How can I create a window with transparent background with swift on osx?

Question

I want to create an osx/cocoa application on my mac, which does something very simple: Display a text string on my mac, with no background. Ultimately this will be a timer w

Answer 1

NSWindow has a property 'opaque' which it is true by default.

The value of this property is true when the window is opaque; otherwise, false.

Just change it to false:

override func viewWillAppear() {
    super.viewWillAppear()
    view.window?.opaque = false
    view.window?.backgroundColor = NSColor(red: 1, green: 0.5, blue: 0.5, alpha: 0.5)
}

Swift 4 update: opaque has been renamed isOpaque

override func viewWillAppear() {
    super.viewWillAppear()
    view.window?.isOpaque = false
    view.window?.backgroundColor = NSColor(red: 1, green: 0.5, blue: 0.5, alpha: 0.5) 
}