akshitzaveri

// MARK: - UI objects

private lazy var circleView: UIView = {
  let view = UIView()
  view.translatesAutoresizingMaskIntoConstraints = false
  view.backgroundColor = .red
  view.clipsToBounds = true
  return view
}()

akshitzaveri

@IBOutlet weak var circleView: AnimatableCircleView!

akshitzaveri

@IBOutlet weak var circleView: UIView!

akshitzaveri

import UIKit

final class AnimatableCircleView: UIView {

  // MARK: - Initializers and Life cycle

  required init?(coder: NSCoder) {
    super.init(coder: coder)
    self.setup()
  }

akshitzaveri

// Step1: Call posts API
group.enter()
AF.request(Endpoint.posts).response { response in
  group.leave()
}

akshitzaveri

// 5
override func viewDidLoad() {
  super.viewDidLoad()

  self.isWaiting = true

  // Step0: Creating and entering dispatch groups
  let group = DispatchGroup()
  group.enter()
  group.enter()

akshitzaveri

import UIKit
import Alamofire

final class ViewController: UIViewController {

  // 1
  private struct Endpoint {
    static let posts = "http://jsonplaceholder.typicode.com/posts"
    static let comments = "http://jsonplaceholder.typicode.com/comments"
  }

akshitzaveri

import Foundation

protocol WalkableAnimal {
  func walk()
}

protocol RunnableAnimal {
  func run()
}

akshitzaveri

import Foundation

protocol Animal {
  func walk()
  func run()
}

extension Animal {
  func run() {
  }

akshitzaveri

import Foundation

@objc protocol Animal {
  func walk()
  @objc optional func run()
}

class Elephant: NSObject, Animal {
  func walk() {
    print("I am walking")