Benefits of modularisation • Less code to maintain (per module) • Less dependencies • Explicitely declared dependencies • Well defined interface • You can’t be lazy anymore Better maintainability
Benefits of modularisation • Managing dependencies is a nightmare • Multiple modules might have the same dependency • Different modules use different versions of their dependencies • Updating one module requires all dependant modules to update The downside of all of this
CocoaPods • Adds the source code of AFNetworking • Adds all resources of AFNetworking • Adds all dependencies of AFNetworking • Configures your Xcode project The Podfile
CocoaPods • Updates the source code of AFNetworking • Updates all resources of AFNetworking • Updates all dependencies of AFNetworking • Configures your Xcode project The Podfile
CocoaPods • Contains all dependencies a pod has • other pods, libraries, frameworks • Contains the list of public files and resources • Contains the path to the pod and other meta data • version, description, author,… The .podspec
Creating a pod • A pod contains a .podspec file • Contains all the meta data that is necessary • May contain a demo and a test target > pod lib create Essential parts
Semantic Versioning • Dependency management through version numbers • All modules follow the same versioning concept • Great to be used for frameworks and libraries • Not for marketing or application versioning
Semantic Versioning • Used for backwards compatible bug fixes • No new public API • Internal API may change • Fixes internal misbehaviour MAJOR.MINOR.PATCH
Semantic Versioning • Introduces new features or new public API • Introduces deprecations in the public API • May introduce substential internal changes • May contain patch level changes • Patch version must be reset to 0 MAJOR.MINOR.PATCH
Semantic Versioning • Introduces backwards incompatible changes to the public API • May contain minor and patch level changes • Minor and patch version must be reset to 0 MAJOR.MINOR.PATCH
Semantic Versioning • Development starts with 0.1.0 • New features and removed public API: 0.2.0 • Bugfix release: 0.2.1 • First stable version: 1.0.0 • Public method is deprecated: 1.1.0 • New features: 1.2.0 • Bugfix release: 1.2.1 • New version that removes previously deprecated methods: 2.0.0 Example
Semantic Versioning • Modules depend on another modules major version • Minor and patch are just used to get the minimum version • Automatically upgrade to all minor and patch versions Dependency management
The specs repository • A git containing all .podspec files from the supported pods • Used by pod install and pod update • Referenced in the Podfile via the source keyword
michaelochs
paper2
10xinc
hirobe1999
javiergs
miso
mpyw
bastnic
blackbracken
os1ma
cocoeyes02
gpsnmeajp
alexandresalome
phodgson
aarron
keathley
chriscoyier
ufuk
michaelherold
akmur
mza
iamctodd
ammeep
smashingmag
jakevdp