A quick introduction to using Cocoapods in an Xcode project. Demo Notes (in markdown): ## Using Cocoapods Demo 1. Create a new Single View project in Xcode called **MyProject**. 1. Create **Podfile** in project root. 1. Search [Cocoapods.org](http://Cocoapods.org) for a pod ([AFNetworking](http://cocoapods.org/?q=afnet)). 1. Point out features of web site. 1. Use clipboard icon to copy/paste AFNetworking. 1. Run `pod` in terminal (installation). 1. point out errors/warnings. 1. point out and explain loc file (bbedit **Podfile.lock**). 1. point out installed dependencies (if any). 1. point out **Pods.xcconfig**. 1. change the pod file (Remove AFNetworking and add [SVProgressHud](http://cocoapods.org/?q=svP)). 1. run `pod` again to see removal and updates. 1. Open **MyProject.xcworkspace** 1. Add a SVProgressHud call on **ViewDidAppear** of primary view controller. - (void)viewDidAppear:(BOOL)animated { [SVProgressHUD showSuccessWithStatus:@"It Worked!"]; } 12. Build and run the app. <!--BREAK--> ## Creating Podspec Demo 1. Open and demonstrate **AwesomeProject**. 1. Decide to create a pod for **UIViewController+Alerts** category. 1. Show pod creation help in terminal: **`pod lib`** (note options). 1. Create a library on the ~/Desktop **`pod lib create iOSKW`**. 1. Explain the folder structure. 1. Copy in UIViewController+Alerts.h & .m files into **Classes/ios**. 1. run **`pod lib lint`**. 1. note warnings and errors. 1. Edit `bbedit iOSKW.podspec` as follows: Pod::Spec.new do |s| s.name = "iOSKW" s.version = "0.1.0" s.summary = "UIViewController Categories." s.homepage = "http://example.com" s.license = 'MIT' s.author = { "jsambells" => "jeffrey@speakfeel.ca" } s.source = { :git => ".", :tag => s.version.to_s } s.platform = :ios, '7.0' s.requires_arc = true s.source_files = 'Classes/ios/*.{h,m}' s.frameworks = 'UIKit' end 1. Run `pod lib lint`. 1. Commit to local git repo. 1. Tag local git as **0.1.0** to match Podspec. 1. Re-run `pod lib lint` to verify 1. Create demo app called **Demo** on desktop and copy contents to the lib folder. 1. Remove empty targets from default Podfile (will error if you don't!). 1. Run `pod` in Project, note output. 1. Import `<ioskw />` header into primary view controller. 1. And add test code to view did load. - (void)viewDidLoad { [super viewDidLoad]; [self alert:@"HEllo!"]; } 1. Run demo app.

1. Using CocoaPods
Library Dependency Management for Xcode
with Jeffrey Sambells!
http://JeffreySambells.com

2. Why CocoaPods?

3. Build dependencies
Error-prone
+
Difficult upgrade path
Cluttered project
Link binary with libraries
=
Header search path
Libraries in version control
No transitive dependencies

4. Automatic add/remove
Automatic build configuration
Project is always shippable!
Discoverability
+
+
Large ecosystem
=
Separation of third-party code
Handles ARC and no ARC
Only includes the relevant source files

5. Installation…
$ sudo gem update -- system
$ sudo gem install cocoapods
$ pod setup

6. Using CocoaPods
in Xcode

7. Cocoapods Workflow
1. Create your Podfile
2. Search for and add your dependencies
3. Run pod command
4. Open your new .xcworkspace (it will be created)
5. ???
6. Profit!

8. Creating the Podfile
$ cd /path/to/project/folder
$ touch Podfile

9. Simple
pod 'AFNetworking'
pod 'ObjectiveSugar', '~> 0.5'

10. Advanced
platform :ios, '7.0'
inhibit_all_warnings!
!
workspace 'Example.xcworkspace'
!
pod 'AFNetworking', :git => 'https://github.com/gowalla/
AFNetworking.git', :commit => '082f8319af'
!
pod 'MySecretPod', :path => ‘~/Documents/MySecretPod'
!
pod 'BleedingEdgePod', :head
!
target :KIFTests, :exclusive => false do
pod 'KIF'
end
!
post_install do |installer|
installer.project.targets.each do |target|
puts "#{target.name}"
end
end

11. Install/Update into Project
$ cd /path/to/project/folder
$ pod
Hint: use pod --verbose if you want more info.

12. The Podfile and
Dependencies

13. General Settings
Specify a platform and minimum version
platform :ios, '6.1'
!
Optionally specify project and workspace files.
For example MyProject.xcodeproj and
MyProject.xcworkspace
xcodeproj 'MyProject'
workspace 'MyWorkspace'

14. Dependencies (Pods)
Specify pod name and other options as
necessary:
•
pod ‘PodName'
Some pods use sub specs to group optional
functionality so you need to specify them as well:
•
pod
‘PodName'
pod ‘PodName/SubSpecA’
pod ‘PodName/SubSpecB‘

15. Pod Versioning x.x.x
•
References a specific git tag using a semantic version.
•
Specify no version, a specific version, a logical version
or an optimistic version.
pod
pod
pod
pod
•
‘PodName’
‘PodName’, ‘0.1.0’
‘PodName’, ‘<= 0.1.0’
‘PodName’, ‘~> 0.1.0’
You can also use :head to get the most bleeding edge
version.
pod ‘PodName’, :head

16. Logical Versions
•
'> 0.1' Any version higher than 0.1
•
'>= 0.1' Version 0.1 and any higher version
•
'< 0.1' Any version lower than 0.1
•
'<= 0.1' Version 0.1 and any lower version

17. Optimistic Versions
•
'~> 0.1.2' Version 0.1.2 and the versions up to
0.2, not including 0.2 and higher
•
'~> 0.1' Version 0.1 and the versions up to 1.0,
not including 1.1 and higher
•
'~> 0' Version 0 and higher, this is basically the
same as not having it.

18. Pod Sources
Pods load information from a podspec file.
The podspec files are located in…
•
the shared public spec repo at
https://github.com/CocoaPods/Specs,
•
on your local machine,
•
in a private git repo.

19. Public Shared Specs
you only need to specify the name:
•
pod 'AFNetworking'
you can optionally specify a specific branch or
fork:
•
•
pod ‘AFNetworking’, :git => ‘https://github.com/
iamamused/AFNetworking.git'
and a specific commit:
pod ‘AFNetworking’, :git => ‘https://github.com/
myuser/AFNetworking.git', :commit => '082f8319af'

20. Local Podspecs
Load a podspec from your local machine
using :path
pod ‘MyAwesomePod’, path: => ‘../path/
MyAwesomePod.podspec’

21. Private Podspecs
Load a podspec from a private git repository using
:git (simiar to public specs)
pod ‘MyAwesomePod’, git: => ‘http://example.com/
MyAwesomePod.git’

22. Bonus
Code doesn’t have a pod? no problem. Make your
own pod spec for it and use that:
!
pod 'ExampleKit', :podspec => !'https://raw.github.com/gist/
123/ExampleKit.podspec'

23. Targets
Targets allow you to specify which Xcode target
have which pod dependencies.
Pod dependencies are applied to
individual or multiple targets.
If no specific target is specified it
only applies to the first target in your project!

24. Targets
Use link_with to specify multiple targets for all
pod dependencies:
pod ‘PodName’
link_with [‘MyApp’,’MyAppDemo’]

25. Targets
Or use target :targetname to specify targets
individually:
pod ‘PodName’
!
target :test, :exclusive => true do
pod 'Kiwi'
end
!
•
exclusive => true will only include pods declared in
the target block.
•
exclusive => false will include pods declared in the
target block along with those declared in the parent.

26. Hooks
pre_install
Make any changes to the Pods after they have
been downloaded but before they are installed.
!
!
pre_install do |installer_representation|
# Do something fancy!
end

27. Hooks
post_install
Make any changes to the generated Pods project,
or any other tasks you might want to perform.
!
post_install do |installer_representation|
installer_representation.project.targets.each do |target|
target.build_configurations.each do |config|
config.build_settings['GCC_ENABLE_OBJC_GC'] = 'supported'
end
end
end

28. Pod Best Practices
•
Check the source, documentation and upkeep
of a pod! Don’t blindly use them.
•
Include pods in source control? NO! err YES!
•
Use inhibit_all_warnings! to hide warnings in
Pods (after you check them).

29. DEMO TIME!

30. Thanks!
More Info"
cocoapods.org
JeffreySambells.com
@iamamused