Mani Ramezan May 2024 Enhancing Swift Development through Modularization and Automation 

About me • M a ni (M a a ni) R a mez a n • St aff Engineer a t LinkedIn • Kodeco • Tech editor • Discord iOS moder a tor • Previous bootc a mp mentor 

Agenda • Modul a riz a tion in Swift • Autom a tion tooling • Gener a l tips a nd tricks • Q&A 

Modularization in Swift What’s a module in Swift “A module is a single unit of code distribution — a framework or application that’s built and shipped as a single unit and that can be imported by another module with Swift’s import keyword.” Swift Docs 

Modularization in Swift Bene fi ts of modularization • Provides n a mesp a cing • Encour a ge implementing code th a t’s: • Reus a ble • Sc a l a ble • M a int a in a ble 

Modularization in Swift Faster build • Better resource utiliz a tion • Build multiple modules simult a neously • Single module • Module c a ching • E a sier to scope the e ff ect of ch a nges • Help compiler to help you App M1 M2 App M3 M4 

Modularization in Swift Look out for • Mixing Objc a nd Swift code together • C a n result in overly complic a ted dependency gr a ph • Alw a ys pro f ile the build • Be c a utious a bout a dding new dependencies between modules 

Automation tooling Why automate? • Cre a te a Xcode project • Add the project to worksp a ce • Build settings • Bundle identi f ier • Codesigning • Min deployment • Compiler f l a gs 

Automation tooling Tooling • coco a pods/xcodeproj • Written in ruby • Used by coco a pods • H a s gre a t document a tion • tuist/xcodeproj • Written in Swift • Used by B a zel 

Automation tooling Xcode project structure • xcworksp a ce • xcodeproj • T a rget • xccon f ig • Source f ile • Resources • … 

Automation tooling xcworkspace MyWorkspace.xcworkspace ├ xcshareddata │├ IDEWorkspaceChecks.plist -> General workplace checks and settings ├ xcuserdata -> Used by Xcode to store user states ├ contents.xcworkspacedata -> Includes references to xcodeproj fi les 

Automation tooling xcodeproj MyAwesomeApp.xcodeproj ├ xcshareddata │├ xcschemes ├ xcuserdata -> User speci fi c con fi gs used by Xcode ├ project.pbxproj • Where most of your automation work is done • No o ff i cial documentation • Each item is assigned a unique identi fi er • ASCII/NeXTSTEP Property List 

Automation tooling Build con fi guration • C a n sh a re Build Settings by using con f igur a tion f iles • Multiple con f igur a tions c a n be combined together • #include “Sh a red.xccon f igs 

Automation tooling Set based con fi guration 

Automation tooling Tip on reading each con fi g docs • a lt+double click a ny item in Build Setting to bring up the document a tion a nd the environment v a ri a ble n a me for th a t setting 

Automation tooling Automated steps • Cre a te a new xcodeproj • Add m a in t a rget a nd unit test t a rgets • Add con f igur a tion • Add def a ult f iles like unit test a nd umbrell a he a der • Upd a te your m a in pbxproj f ile to a dd this new fr a mework a s a dependency 

General tips and tricks • Alw a ys cre a te a b a se xccon f ig f ile • T a ke a dv a nt a ge of con f igur a tion hier a rchy • If possible, move to y a ml structure a nd use XcodeGen or tools like B a zel to gener a te projects • No more merge con f lict on pbxproj • Modul a rized unit a nd UI tests a s well • Cre a te unit a nd UI test util fr a meworks 

General tips and tricks 

General tips and tricks 

Q&A [email protected] Kodeco Discord Chat