Hey to all the mobile community! Since 2016 we have been curating Flawless iOS, a community-driven blog about iOS development. So far it's the biggest iOS blog on Medium with both beginner and advanced iOS guides, written by fellow developers. Updated almost every day.

We're proud to have more than 80 writers and 200+ free iOS guides published within Flawless iOS Medium blog. In this repo you can find all of them, nicely categorized. Learn from these comprehensive guides, share your articles with us and follow Flawless iOS publication on Medium.

Table of Content

Architecture

The only viable iOS architecture by Amirzhan Idryshev

Auto Layout

How to make Auto Layout more convenient in iOS by Khoa Pham

Closures

Simplifying communication patterns with closure in Swift by Khoa Pham
You don’t (always) need [weak self] by Besher Al Maleh
Closure in Swift: The Painful one! by Shubham Bakshi
Unowned vs Weak by Fahad C H

CocoaPods

Create your own CocoaPods library by Yong Su

Combine

Problem Solving with Combine Swift by Arlind Aliu
Will Combine kill RxSwift? by MortyMerr
Visualize Combine Magic with SwiftUI Part 1 by Kevin Cheng
Visualize Combine Magic with SwiftUI Part 3 by Kevin Cheng
Visualize Combine Magic with SwiftUI Part 5 by Kevin Cheng
Building smart Q&A app with CoreML, SwiftUI, and Combine by Martin Mitrevski
How to create custom Publisher in Combine by Dmitry Lupich

Concurrency

Parallel Programming with Swift: What could possibly go wrong? by Jan Olbrich
Parallel programming with Swift: Basics by Jan Olbrich
Parallel programming with Swift: Operations by Jan Olbrich
Parallel programming with Swift: Promises by Jan Olbrich
Multithreaded Programming in iOS by Medi Assumani
GPU Speedup by Mohammad Jeragh

Continuous Integration & Continuous Delivery

How to set up your iOS project with Continuous Integration and Delivery by Lawrence Tan
How to set up GitLab Continuous Integration for iOS projects without a hassle by Victor Peschenkov
Build it, Test it, Deliver it! Complete iOS Guide on Continuous Delivery with fastlane and Jenkins by S.T.Huang
Automate your iOS apps using Bitrise by Gokhan Gultekin
Continuous Integration for Flutter with Codemagic by Codemagic
iOS Continuous Integration with GitLab CI, Fastlane & OTA Installation by Leszek Szary
Secret variables in Xcode AND your CI for fun and profit by Robin Malhotra

Curation

Awesome Ladies iOS Engineers to Follow on Twitter by Lisa Dziuba
15 great iOS newsletters you should know about by Lisa Dziuba
33 awesome GitHub lists for iOS development by Lisa Dziuba
Best resources for Advanced iOS Developer (Swift) by Pavlo Shadov

Data Structure

Doubly Linked Lists — Swift 4 by Sarin Swift
Error trees in iOS by Isaac Carol Weisberg

Debugging

Advanced debugging with Xcode by Vincent Pradeilles
Bringing awesome logs to your iOS app by Vincent Pradeilles

Deep Dive

IPC — Mach Message by Ali Pourhadi

Dependency Injection

iOS Dependency Injection Using Swinject by Ali Akhtar

Design System

What Design Language System looks from the engineers’ side? by Sting.Su

Flawless App

How Flawless App will make you a better UI designer by Ahmed Sulaiman
Flawless App update: redesigned UI and UX, dark mode and optimised file selection by Flawless App

Flutter

Flutter vs React Native: A Developer’s Perspective by Codemagic
Flutter: TDD with Unit Tests by Lawrence Tan

Frameworks

Getting Started with Reusable Frameworks for iOS Development by Alec O'Connor
Improve your iOS team’s productivity by building features as frameworks by Alexander Freas

Git

Useful git commands for everyday use! by Khoa Pham

How to Implement an App: Case-Studies

A Christmas Challenge — A Cinema app in just 7 days by James Sherlock
How I created Apple’s Voice Memos clone by Hassan El Desouky
Creating Game of Life on iOS by Arlind Aliu
How you can build a private photo-sharing app in 30 minutes with Creo by Massimo Sgrelli
Implementing Foldable, Map and FlatMap by Tyrone Michael Avnit
Building Movie Trailer App Using SwiftUI by Shankar Madeshvaran

Image

Image Cropping in Swift by Ashok Kumar

Implementing Animations in iOS

Delightful animations in iOS by Roland Leth
Using Sky Segmentation to create stunning background animations in iOS by Eric Hsiao
Cool Custom ViewController Transitions — Easy by Fran Obarrio
Cool Custom ViewController Transitions — Advanced by Fran Obarrio
Animated gradient layers in Swift by Prabhu S
RxAnimated — animated bindings by Stfalcon.com

Implementing Integrations

Facebook Account Kit using Swift by Anas Zaheer
Unity Integration in Native iOS & APIs by Azeem Azeez
Scratching the Firebase services with your iOS app by Deyan Aleksandrov
Managing your App Distribution with Firebase by Nabil Kazi

iOS

iOS 11

Sneak peek into iOS 11 Drag & Drop API using Swift by Yuri Chukhlib

iOS 12

All about iOS 12 Autofill Passwords Tool API’s by Ali Akhtar

iOS 13

How To Prepare Your App For iOS 13 by Attia Mo
A “Swifty” way to pick Documents by Abraham Mangona
iOS 13 UISegmentedControl: 3 important changes by Rostyslav Dovhaliuk
How to Request Device Motion and Orientation Permission in iOS 13 by Lee Martin
How to use a full-text search on iOS? by Pavle Pesic
Handling iOS 13 Bluetooth Permissions by Anupam Chugh
Backward compatible Dark Mode on iOS by Maksym Shcheglov
Enable Accessibility VoiceOver for ImageView in iOS 13 on Xcode with Swift by Mumtaz Hussain
Implementing Dark Mode on iOS by Bao Nguyen
Getting started with PencilKit on iOS 13 by Martin Mitrevski
iOS 13: Optical Character Recognition by Chris Mash
Upgrade the UI with iOS 13 by Takuma Kakehi

iOS Simulator

iOS Simulator on steroids: Tips & Tricks by Ahmed Sulaiman

iPadOS

Multi-window development in iPadOS by Chris Mash
Using native Apple’s Places by Andrew Konovalskyi

JSON Parsing

Let’s parse the JSON like a Boss with Swift Codable protocol by Shakti Prakash

Localisation

DRY String Localization with Interface Builder by Victor Pavlychko

Machine Learning in iOS

iOS Vision And Highlighting Text With Core ML by Anupam Chugh
Machine Learning in iOS: IBM Watson and CoreML by Khoa Pham
Machine Learning in iOS: Azure Custom Vision and CoreML by Khoa Pham
Machine Learning in iOS: Turi Create and CoreML by Khoa Pham
Vision in iOS: Text detection and Tesseract recognition by Khoa Pham

Making Xcode Work Better for You

Become more productive and efficient in Xcode by Farhan Syed
One-Stop Xcode Coziness by Wendy Liga
Optimize Swift build and compile times in Xcode by Batikan
Improve your Xcode (Swift) Compile Time by Alexandros Smponias
Essential Xcode Shortcuts for More Efficient Coding by Peter Friese
Xcode 11 now makes “//MARK:” comments a lot more useful with Minimap feature by Mumtaz Hussain
7 Useful Tips and Tricks for Xcode by Göktuğ Gümüş

Memory Management

Memory Leaks in Swift by Leandro Pérez
iOS Memory Management in Under 6 Minutes by Hassan El Desouky
Reducing Memory Footprint and OOM Terminations in iOS by Leandro Pérez

Navigation

Creating a UITabBarController Framework by Malcolm Kumwenda

Patterns

Returning Error vs Throwing Error in Swift by Lau Kwok Ping
Strategy pattern in Swift by Juanpe Catalán
Flow coordinator pattern on steroids by Pavle Pesic
An elegant pattern to craft cache-efficient functions in Swift by Vincent Pradeilles
Design patterns by Tutorials— The power of OOP (part 1) by Hitendra Solanki
Design patterns by Tutorials — The power of OOP (part 3) by Hitendra Solanki
Builder Design Pattern in iOS by Oguz Parlak

Playgrround

Playground driven development in Swift by Khoa Pham

Protocols

Writing a Network Layer in Swift: Protocol-Oriented Approach by Malcolm Kumwenda
Improving code testability with Swift protocols by Juanpe Catalán
Protocol-based Themes in iOS Apps by Muhammad Nayab Butt

Push Notifications

iOS remote push notifications in a nutshell by Deyan Aleksandrov
Strong-typed Notifications in Swift by Leandro Pérez
iOS Dynamic Push Notifications with AWS Pinpoint by Marvin Mouroum
Local Notifications in Swift 5 and iOS 13 with UNUSerNotificationCenter by Lachlan Miller

RxSwift

Simplifying RxSwift code by MortyMerr
Reactive Heart Rate Monitors in Swift by Leandro Pérez
The state of modern Rx in iOS by Isaac Carol Weisberg

Siri

WWDC 2018 for iOS developers: Siri Shortcuts by Jan Olbrich
Ask user input from Siri in custom Intent for iOS 13 by Abhilash Mathur

Soft Skills

How I failed 39 interviews and what I’ve learned by Hassan El Desouky
How to get the first job as an iOS developer by Hassan El Desouky
How to maintain the focus as a software developer? by Pavle Pesic

Sourcery

How to supercharge Swift enum-based states with Sourcery by Alexey Demedeckiy

Speeding up workflow & productivity tips

Squeezing Xcode for hard drive space by Chris Mash
iOS project best practices and tools by Piotr Gorzelany
Make your next iOS project a huge success by Alexandros Smponias
Achieving maximum test readability at no cost for iOS by Victor Magalhães
Best iOS hacks from Twitter: October Edition by Lisa Dziuba
Best iOS hacks from Twitter: November Edition by Lisa Dziuba
Best iOS hacks from Twitter: December Edition by Lisa Dziuba
Best iOS hacks from Twitter: January & February Edition by Lisa Dziuba
Best iOS hacks from Twitter: March & April Edition by Lisa Dziuba

Storyboards

Will Storyboards still be alive? by Nabil Kazi
Reducing iOS storyboard merge hell by Chris Mash

Swift

UndoManager in Swift 5 with example by Hitendra Solanki
Disjoint-set union in C++ and Swift by Hassan El Desouky
Access Control Basics in iOS Swift — Part 1 by Richard Lu
Access Control Basics in iOS Swift — Part 2 by Richard Lu
How can Property Wrappers and Function Builders be leveraged? by Vincent Pradeilles
Dictionaries in Swift by Adriatik Gashi
Swift & Objective-C Mixed Languages App by Anand Nimje
A practical guide to Weak Referencing in Swift by Serge Mata M
Fireworks — A visual particles editor for Swift by Besher Al Maleh
Static vs Dynamic Dispatch in Swift: A decisive choice by Shubham Bakshi
Stubbing in pair with Swift compiler: a spy registration by Bartosz Polaczyk
Swift Compiler: What we can learn by Ali Pourhadi
What is PassKit and how to use it? by Kristaps Grinbergs
Reusable Image Cache in Swift by Maksym Shcheglov
SwiftLint in Use by Soheil Novinfard
Say Goodbye to “Index out of range” — Swift by Wendy Liga
That “return” keyword in guard let statement in Swift by Mumtaz Hussain

SwiftUI

My takeaway from working with SwiftUI by T. Khan Abbas
SwiftUI — How to setup a project by Martin Lasek
SwiftUI - Understanding State by Martin Lasek
SwiftUI - Dynamic List & Identifiable by Martin Lasek
SwiftUI & Combine: Better Together by Peter Friese
Tips & Tricks: Remaking the 2048 game with SwiftUI and Combine by Carlos Corrêa
The Simple Life(cycle) of a SwiftUI View by Danny Bolella
Build fast and better Apps with SwiftUI by Jaydeep Vora
An Instagram clone using SwiftUI and GraphQL — ProfileView by Back4App
Fast app prototyping with SwiftUI by Carlos Corrêa
SwiftUI Accessibility: Sort Priority by Rob Whitaker
SwiftUI Accessibility: Named Controls by Rob Whitaker
SwiftUI Accessibility: Images by Rob Whitaker
SwiftUI Accessibility: Accessible User Interface by Rob Whitaker
SwiftUI Accessibility: Attributes by Rob Whitaker
SwiftUI Accessibility: Traits by Rob Whitaker
SwiftUI Accessibility: User Setting by Rob Whitaker
SwiftUI Accessibility: Semantic Views by Rob Whitaker
SwiftUI Accessibility by Rob Whitaker
How To Build A Firebase App With SwiftUI by Sebastian Esser
Build a Compass app with SwiftUI by Darren
What’s the Delegation Protocol in SwiftUI? by Danny Bolella
Gradient in SwiftUI by Ashish Kakkad
MapKit in SwiftUI by Anand Nimje
Programmatic navigation in SwiftUI project by Alexey Naumov
SwiftUI Tutorial: Showing Badge on Tab Bar Item by Jihad Fayz
Gestures and Animations in SwiftUI by Jihad Fayz
SwiftUI: Movie Booking App, Part 2: Movie & Actor Detail View by Liquidcoder
Getting Started with SwiftUI by Nilay Keven

Testing

How to test iOS apps with Combine, ReactiveSwift and RxSwift by Szymon Mrozek
Automated UI Testing in Swift & iOS by Joe Williams
Guarantee Rx memory leaks absence by MortyMerr
Cracking the Tests for Core Data by S.T.Huang
The complete guide to Network Unit Testing in Swift by S.T.Huang
How to use Golden Master testing for your iOS apps by Jan Olbrich
A complete list of articles on Unit Testing with Swift from 2017 by S.T.Huang

Texture

Why I build my apps using Texture (and why you should too) by Robin Malhotra

Tutorial

Getting Started with Moya by Malcolm Kumwenda
Change splash screen in iOS app for dummies (the better way) by Jan Václavík
Clean AppDelegate by Anders Borch
Managing different environments in your Swift project with ease by Yuri Chukhlib
The Beginner’s Guide to Code Coverage by Jubin Jacob

UIKit

Speed Up your iOS Development: Demystifying complex UIViews using Decorators by Francisco Javier Trujillo Mata
A better way to update UICollectionView data in Swift with diff framework by Khoa Pham
Infinite UIScrollView by Aybek Can Kaya
Container View Controllers Redux by Dennis Walsh
Exploring View Hierarchy by Dmytro Anokhin
How to create reusable UIViews in Swift by Pablo Blanco
How to use UICollectionViewDiffableDataSource by Aleksej Gurin
All you need to know about UICollectionViewCompositionalLayout by Aleksej Gurin
How to build complex layout using UICollectionViewCompositionalLayout and UICollectionViewDiffableDataSource by Aleksej Gurin

URLs

URL Routing in iOS apps: Compass Beginner Guide by Khoa Pham
Open URLs using the iOS UIResponder chain in Swift by Joseph El Mallah
Building URLRequests with ease by Juanpe Catalán
iOS Universal links and App Referrals using BranchIO Integration by Sumit Kashid

UX & UI design for mobile developers

The ultimate guide for mobile developers, who want to design by Ahmed Sulaiman
42 great UI Kits for iOS engineers by Lisa Dziuba
10 Year Challenge: How Popular iOS Apps Have Changed by Valia Havryliuk
5 UX and Mobile Marketing Tips to Get Users Hooked to Your App by Pradyut Hande
Animations in iOS: Tab Bar concepts by Lisa Dziuba
UI vs Print: Contradictions in typographical practice by Alexander Artsvuni
Designers guide to user data and CRUD by Tanya Anokhina
How I Created Apple’s Shortcuts Icon System by Hassan El Desouky
iOS design by prototyping and iterating by Martin Mitrevski

White Label Solutions

Managing White Label Solutions by Nabil Kazi
React Native App: White Label 101 by Sean Najera

Writing Better Code

Beautiful Code Principles by Pavle Pesic
Four Rules of Simpler iOS Software Design by Arlind Aliu
From hobbyist to professional iOS Developer: Single Responsibility Principle by Adrian Zyga
From hobbyist to professional iOS Developer: Open/Closed Principle by Adrian Zyga
Explain SOLID Principles from Company perspective by Richard Lu

3D Touch

Getting started with 3D Touch Peek & Pop— Swift by Ashok Kumar

Addendum (Reference & Inspiration)

Flawless iOS blog is curated by Lisa Dziuba & Valia Havruliyk from Flawless App team. Huge thanks to our good friend onmyway133 for all his help in making this repo. If you are Flawless iOS writer and want to add your article, feel free to create pull requests! And if you wish to become a writer, just share your Medium article\draft via a form. Thanks

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