EvolverSwiftUI

//
//  BottomSheetView.swift
//
//  Created by Majid Jabrayilov
//  Copyright © 2019 Majid Jabrayilov. All rights reserved.
//
import SwiftUI

fileprivate enum Constants {
    static let radius: CGFloat = 16

EvolverSwiftUI

iOS Interview Questions

Sources include, but not limited to:

• https://izeeshan.wordpress.com/2015/03/31/interview-stuff/
• https://github.com/9magnets/iOS-Developer-and-Designer-Interview-Questions
• https://www.quora.com/What-do-startups-look-for-in-a-candidate-during-an-iOS-technical-interview-What-do-they-want-to-hear
• https://www.linkedin.com/pulse/ios-interview-questions-senior-developers-alex-bush
• https://www.raywenderlich.com/110982/swift-interview-questions-answers

In Swift, what is the difference between a struct and a class?

EvolverSwiftUI

import UIKit

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        setupCollectionView()
    }
    
    func setupCollectionView() {
        let searchCollectionView = UICollectionView(frame: .zero, collectionViewLayout: getCompositionalLayout())

EvolverSwiftUI

import Foundation
import Combine

class SignUpViewModel: ObservableObject {
        
    @Published var userProfile: UserProfileModel?
    private var cancellables = Set<AnyCancellable>()
    
    func getOnboardingData() {
        let publishers = Publishers.Zip(

EvolverSwiftUI

import UIKit
import Combine

class ViewController: UIViewController {
    
    @IBOutlet private var userNameTextField: UITextField!
    @IBOutlet private var passwordTextField: UITextField!
    @IBOutlet private var tncSwitch: UISwitch!
    @IBOutlet private var signupButton: SignUpButton!
    

EvolverSwiftUI

class AircraftView: UIView {
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupView()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        setupView()
    }

EvolverSwiftUI

class BoardingPassView: UIView {
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupView()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        setupView()
    }

EvolverSwiftUI

iOS Code Review Checklist

Avoid Type Inference
Prefer using Higher Order Functions
Write DRY code (Don’t Repeat Yourself)
Make sure that there are no force unwraps
Make sure that there are no retain cycles
Check if any deprecated API is being used
Check if any hardcoded checks (generally strings) can be changed to enum.
Prefer enum, switch over if else. 

EvolverSwiftUI

func urlSession(_ session: URLSession, didReceive challenge: URLAuthenticationChallenge, completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {
        guard let serverTrust = challenge.protectionSpace.serverTrust else {
            completionHandler(.cancelAuthenticationChallenge, nil);
            return
        }
        
        let certificate = SecTrustGetCertificateAtIndex(serverTrust, 0)
        
        // SSL Policies for domain name check
        let policy = NSMutableArray()

EvolverSwiftUI

import Foundation
import PerfectLib
import PerfectHTTP
import PerfectHTTPServer

func setupRouter() -> Routes {
    var routes = Routes()
    
    routes.add(method: .get, uri: "/flights") { request, response in
        FlightsListController().handleFlightsListRequest(request: request, response: response)