Cocoa Programming for OS X: The Big Nerd Ranch Guide

Synthesizing Speech

Cocoa includes the class NSSpeechSynthesizer; instances of this class produce speech from text.

In MainWindowController.swift, create an instance of NSSpeechSynthesizer.

class MainWindowController: NSWindowController {

    @IBOutlet weak var textField: NSTextField!
    @IBOutlet weak var speakButton: NSButton!
    @IBOutlet weak var stopButton: NSButton!

    let speechSynth = NSSpeechSynthesizer()

    override var windowNibName: String {
        return "MainWindowController"
    }

    ...
}

The NSSpeechSynthesizer class includes these important methods:

  func startSpeakingString(_ text: String!) -> Bool

  func stopSpeaking()

Modify your action methods to call these methods.

class MainWindowController: NSWindowController { ... override func ...