KiranJasvanee

{
        "pn_apns": {
             "aps": {
                  "alert": "hello world"
            },
            "pn_push": [
                {
                    "targets": [
                        {
                            "environment": "development",

KiranJasvanee

import UIKit
import PubNub

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var pubnub: PubNub!
    let listener = SubscriptionListener(queue: .main)
    
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {

KiranJasvanee

import SwiftUI

struct ContentView: View {
    var body: some View {
        Text("Hello, World!")
    }
}

#if DEBUG
struct ContentView_Previews: PreviewProvider {

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// Create the SwiftUI view that provides the window contents.
let contentView = ContentView()

// Use a UIHostingController as window root view controller.
if let windowScene = scene as? UIWindowScene {
    // cast UIScene instance to UIWindowScene to assign that scene to UIWindow.
    let window = UIWindow(windowScene: windowScene)
    // Use UIHostingController to create  a view controller for SwiftUI view contentView.
    window.rootViewController = UIHostingController(rootView: contentView)
    // assign UIWindow instance to your delegate's window object to make it display when app launch happens. 

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optional func scene(_ scene: UIScene, 
      willConnectTo session: UISceneSession, 
            options connectionOptions: UIScene.ConnectionOptions)

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func tryUnowned() {
        // let's get image data from server to load it in our imageview.
        self.getData(from: URL.init(string: self.imageToBeShown)!) { [unowned self] (data, response, error) in
            DispatchQueue.main.async {
                    self.imageView.image = UIImage.init(data: data!)
            }
        }
}

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func tryWeak() {
        // let's get image data from server to load it in our imageview.
        self.getData(from: URL.init(string: self.imageToBeShown)!) { [weak self] (data, response, error) in
            DispatchQueue.main.async {
                self?.imageView.image = UIImage.init(data: data!)
            }
        }
}

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let imageToBeShown = "https://images.pexels.com/photos/221433/pexels-photo-221433.jpeg"
func tryNone() {
        // let's get image data from server to load it in our imageview.
        self.getData(from: URL.init(string: self.imageToBeShown)!) { (data, response, error) in
            DispatchQueue.main.async {
                self.imageView.image = UIImage.init(data: data!)
            }
        }
}
func getData(from url: URL, completion: @escaping (Data?, URLResponse?, Error?) -> ()) {