It's a continuation of my previous post about implementing delegate pattern in iOS. This time it is written in Swift.
App Delegate
import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, TapProtocol{
func buttonTapped() {
print("Button Tapped")
}
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
if let w = self.window,let vc = w.rootViewController as? ViewController
{
vc.delegate = self
}
return true
}
}
View Controller
protocol TapProtocol:class {
func buttonTapped()
}
class ViewController: UIViewController {
weak var delegate:TapProtocol?
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
@IBAction func buttonTapped(_ sender: Any) {
self.delegate?.buttonTapped()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}