Modular iOS App @ UIKonf 2014

Given at the UIKonf 2014 in Berlin.

Transcript

1. Modular iOS Apps Piet Brauer XING AG
2. Architecture should be about enabling small teams to work on small components » Mike Hadlow
3. Should you care about modules? YES, If you ...
4. ... maintain multiple apps
5. ... develop white-label apps with core code bases
6. ... have a large code base
7. How? Multiple approaches
8. Facebook Uses ... » ... one large work space » ... static libraries and bundles » ... xcconfig files » ... FBFoundation, FBUIKit, FBDataModel, FBAppKit » ... Modules register via module manager » ... URL schemes to navigate Modules @ Facebook
9. PSPDFKit Uses ... » ... Dependency Injection » ... a Plugin Infrastructure » ... Aspect oriented programming » ... URL schemes to navigate (with JLRoutes) Aspect by Steipete Slides from ITT
10. XING (Will) Use(s) ... » ... multiple independent projects » ... CocoaPods to link them » ... XNGFoundation, XNGUIKit, XNGDataModel, etc. » ... domain specific modules » ... a module manager » ... URL schemes to navigate
11. What does a Module Manager do?
12. Current
13. Near Future
14. Tools
15. CocoaPods » 2 Specs repositories » 20+ internal Pods » our own pod template
16. Versioneye » ... monitors your projects » ... monitors open source libraries » ... notifies you if a new update was released » ... draws a beautiful dependency graph
17. Rake tasks » Rake is to Ruby what Make is to C » easy to write scripts Sample rake bootstrap # Installs dependencies rake ci # Runs everything needed for the ci server rake deploy # Deploys Beta rake release # Release a new version of the Pod rake spec # Runs the specs
18. Pull Requests work flow » each developer works on his own fork » when he is done he makes Pull Requests » Jenkins builds them and gives feedback » another team mate reviews the code and merges » reviewer decides what version number to pick and releases
19. Travis || Jenkins
20. How we use Jenkins Jenkins ... » ... is triggered on every git commit » ... runs the unit tests » ... sets the build status on the commit in Github
21. Developer Sandboxes
22. How to create a new pod? » pod lib create UIKonf » rake bootstrap
24. Generated project !"" Assets !"" CHANGELOG.md !"" Classes !"" Example # !"" Assets # !"" Example # !"" Example.xcodeproj # !"" Podfile # !"" Podfile.lock # $"" UnitTests !"" Gemfile !"" Gemfile.lock !"" LICENSE !"" README.md !"" Rakefile !"" UIKonf.podspec $"" UIKonf.xcworkspace
25. Development pods pod 'UIKonf', :path => '../UIKonf.podspec' » does not copy source files » work as if the files are in your project » see immediately if something is not public
26. Demo
27. Pitfalls & Solutions
28. Semantic Versioning Is a pain because ... » ... we want every team to use a latest version » ... dependent pods » ... informing other teams about updates is time consuming » ... you never know what you break exactly
29. Semantic Versioning Why resolve the dependencies? » see which pods depend on one » see unnecessary dependencies
30. Semantic Versioning Now works for us because ... » ... Versioneye tracks new versions and informs » ... we don't pin the version in podspecs anymore » ... Jenkins builds all projects that depend on the changed pod
31. Data Model Is a pain because ... » ... it is one CoreData file » ... all pods somehow depend on it
32. Data Model Now works for us because ... » ... it only contains mogenerator generated files
33. Jenkins Was a pain because ... » ... it cannot build forks » ... setting it up takes time
34. Jenkins Now works for us because ... » ... each pod has the same Rakefile » ... all we need to execute is rake ci
35. Localized Strings Was a pain because ... » ... Localization was spread across pods » ... you couldn't track duplicates » ... changes were hard
36. Localized Strings Now works for us because ... » one pod containing all translations » will be maintained by translators » People make Pull Requests with their translations
37. Images Was a pain because ... » ... there were duplicates across the pods » ... changes were hard » ... 2 images with the same name could occur
38. Images Now work for us because ... » ... resource bundle feature in CocoaPods » ... we load them from a bundle » .. no conflicts in naming because of bundles
39. Thanks!! xing.to/PietBrauer && https://twitter.com/pietbrauer Like the modules idea? We are looking for you! https://xing.com/ios
40. Resources » https://www.youtube.com/watch?v=OJ94KqmsxiI » https://github.com/steipete/Aspects » https://speakerdeck.com/steipete/architecting- modular-codebases » http://jenkins-ci.org/ » https://travis-ci.org/ » https://www.versioneye.com/
41. Images * Jenktocat, https://octodex.github.com/images/jenktocat.jpg * Johann Lafer - Rezepte aus meiner Heimat, https://itunes.apple.com/de/app/johann-lafer-rezepte-aus-meiner/id505874478?mt=8 * Sommerrezepte - Die besten Rezepte für die Urlaubssehnsucht, https://itunes.apple.com/de/app/sommerrezepte-die-besten-rezepte/id680597527?mt=8 * Schlank im Schlaf - Die original Rezepte, https://itunes.apple.com/de/app/schlank-im-schlaf-die-original/id584432534?mt=8 * Jenkins, http://fabiouechi.blogspot.de/2012/11/setting-up-jenkins-on-ec2-using.html * Travis CI, http://jmikola.github.io/slides/beautiful_measurable_software/img/travis-mascot-600px.png