Introduction to Cocoapods as Dependency Management for iOS project using Swift. This slide will also introduce some of common library used in iOS Development: Alamofire, SwiftyJSON, MBProgressHUD.

1. Dependency
Management
Cocoapods and the
most common used library in Swift

2. Objective
• We are going to re-create our Weather application
using the most popular library that is widely used
by iOS developer.
• We will see the difference in term of performance
between the app created during Mini Project and
app created during Library.

3. Cocoapods
• Cocoapods is iOS Dependency Management tool.
• Dependency Management tools help to manage
your library , you don’t need to worry about the
dependency and versioning.
• Example of dependency management tool in other
language: Composer and Gradle.

4. Installing Cocoapods
• Update Ruby (Ruby is pre-installed for MAC 10.7
and above) : sudo gem update --system
• Download CocoaPods using gem: sudo gem install
cocoapods
• Install Cocoapods: pod setup

5. $ mkdir -p $HOME/Software/ruby
$ export GEM_HOME=$HOME/Software/ruby
$ gem install cocoapods
[...]
1 gem installed
$ export PATH=$PATH:$HOME/Software/ruby/bin
$ pod --version
Latest installation code in El
Capitan

6. Install Library using Pod
• Go to the path of our Project from terminal
• Create our Podfile using this command:
-pod init
• Open Podfile with Xcode using following
command:
• open -a Xcode Podfile
• Add the library needed between ‘do’ and ‘end’
• Go to your project directory and download
the library : pod install

7. Library repository
• We navigate to cocoapods.org or cocoacontrols.com to get the Library that can be
integrated into our app.
• We are going to add the following Library into the
• Alamofire
• SwiftyJson
• Kingfisher
• SCLAlertView
• Once the app is installed we are going to work with the workspace of the project.

8. Alamofire
• Alamofire is the most popular networking library for
Networking using Swift (AFNetworking for Objective
C)
• AFNetworking is built on top of Foundation URL
loading system.
• Refer to documentation for more info.

9. AFNetworking Sample Code
Alamofire.request(.GET, "https://httpbin.org/get", parameters: ["foo": "bar"])
.responseJSON { response in
print(response.request) // original URL request
print(response.response) // URL response
print(response.data) // server data
print(response.result) // result of response serialization
if let JSON = response.result.value {
print("JSON: (JSON)")
}
}
Alamofire.request(.POST, "https://httpbin.org/get", parameters: ["foo": "bar"])
.responseJSON { response in
print(response.request) // original URL request
print(response.response) // URL response
print(response.data) // server data
print(response.result) // result of response serialization
if let JSON = response.result.value {
print("JSON: (JSON)")
}
}
AFNetworking POST request
AFNetworking GET request

10. SwiftyJSON
• SwiftyJSON is one of the most helpful library to
facilitate the parsing of JSON.
• Due to Swift safe-type and optional binding
principal, we need to verify the type and nullity
when retrieving the JSON.
• SwiftyJSON will help us reduce the complexity of
doing all that.

11. Example
if let topApps = parsedObject as? NSDictionary {
if let feed = topApps["feed"] as? NSDictionary {
if let apps = feed["entry"] as? NSArray {
if let firstApp = apps[0] as? NSDictionary {
if let imname = firstApp["im:name"] as? NSDictionary {
if let appName = imname["label"] as? NSString {
//3
println("Optional Binding: (appName)")
}
}
}
}
}
if let appName = json["feed"]["entry"][0]["im:name"]["label"].string {
println("SwiftyJSON: (appName)")
}
This code in Swift:
Can be simplified to this:

12. MBProgressHUD
• MBProgressHUD is an iOS
library that displays a translucent
HUD with an indicator.
• We use it to inform user that a
background thread is being
executed.
• MBProgressHUD is code written
in Objective C. Cocoapods help
us to bridge the code from
Objective C to Swift.

13. MBProgressHUD Sample
Code
MBProgressHUD.showHUDAddedTo(self.view, animated: true)
MBProgressHUD.hideHUDForView(self.view, animated: true)
MBProgressHUD show a HUD.
MBProgressHUD hide a HUD.

14. Kingfisher
• Kingfisher is a lightweight and pure Swift
implemented library for downloading and caching
images from the web
• It is a UIImageView category. New method will be
added to UIImageView and you can call the
methods to load image from URL
import Kingfisher
imageView.kf_setImageWithURL(NSURL(string: "http://your_image_url.png")!)

15. SCLAlertView
• SCLAlertView is one of
the library that can be
found from
CocoaControls.
• You can create a nicer
UIAlertView for your
application.
SCLAlertView().showWarning("Hello
Warning", subTitle: "This is a more
descriptive warning text.") // Warning
SCLAlertView().showInfo("Hello Info",
subTitle: "This is a more descriptive info
text.") // Info