LetterCountChallenge アプリケーションの Swift 版 (『MAC OS X COCOA プログラミング』第5章)

LetterCountChallengeAppDelegate.swift

import Cocoa

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {


    @IBOutlet weak var window: NSWindow!
    @IBOutlet weak var textField: NSTextField!
    @IBOutlet weak var textLabel: NSTextField!

    @IBAction func countChars(sender: AnyObject) {
        let str = textField.stringValue
        let count = countElements(str)
        textLabel.stringValue = "'\(str)' has \(count) characters."
    }
    
    func applicationDidFinishLaunching(aNotification: NSNotification) {
        // Insert code here to initialize your application
    }

    func applicationWillTerminate(aNotification: NSNotification) {
        // Insert code here to tear down your application
    }


}