Using CocoaPods for Objective-C Library Management

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Using CocoaPods for Objective-C Library Management Richard Lee Polydice, Inc.

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iOS Dev Since 2010 Richard Lee @dlackty everywhere

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Who know this?

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Three20 •UI collections & utilities for iOS •Derived from old Facebook for iPhone •#1 starred Objective-C project on GitHub •Where I started my journey to OSS •Abandoned project for around a year though •Also, Three20 is notorious for...

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It is so hard to add Three20 to my project .

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Cocoa library installation Install Cocoa library is hard because •Library / framework dependencies •Automatic reference counting v.s. non-ARC •Header files import dependencies •Compiler choices (gcc / gcc-llvm / clang) •Xcode / iOS version differences

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UIViewController NSArray TTNavigator FBGraphObject PSTCollectionView AFNetworkOperationQueue Even worse, there is no namespace in Objective-C

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CocoaPods

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CocoaPods’s goals •Make working with dependencies simple •Improve library discoverability and engagement

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Podfile lists the dependencies of your app How CocoaPods works? Podfile.lock locks the versions of pods Podspec contains specs of pods Pod represents a Cocoa library

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Start using CocoaPods today! Create your Podfile Install dependencies Install CocoaPods Then you’re ready to go!

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Install CocoaPods: $ [sudo] gem install cocoapods $ pod setup

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Sample Podfile platform :ios, :deployment_target => '5.0' pod 'Nimbus/Core' pod 'Nimbus/NetworkControllers' pod 'Nimbus/WebController' pod 'AFNetworking' pod 'BlocksKit', '=1.5.2' pod 'SSPullToRefresh', '>=1.0.0' pod 'SDURLCache' pod 'Facebook-iOS-SDK' pod 'iCookSDK', :git => "git@..."

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Install dependencies: $ pod install

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Open app.xcworkspace and everything is done!

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Nice! But...what if, there’re no Podfile available for my desired library?

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Create Podspec Podspec describes library’s •Basic infos (Name / Description / Version) •Where to download? (Mostly Git) •Copyright info (Author and license) •Source files / Header files / Resource files •Compile settings •Library dependencies

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Create Podspec: $ pod spec create OSDCView Lint Podspec: $ pod spec lint OSDCView

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