Book Image

Swift Essentials - Second Edition

By : Alex Blewitt
Book Image

Swift Essentials - Second Edition

By: Alex Blewitt

Overview of this book

Swift was considered one of the biggest innovations last year, and certainly with Swift 2 announced at WWDC in 2015, this segment of the developer space will continue to be hot and dominating. This is a fast-paced guide to provide an overview of Swift programming and then walks you through in detail how to write iOS applications. Progress through chapters on custom views, networking, parsing and build a complete application as a Git repository, all by using Swift as the core language
Table of Contents (17 chapters)
Swift Essentials Second Edition
About the Author
About the Reviewer

Creating the client

Now that the utilities are complete, the GitHub client API can be created. Once that is complete, it can be integrated with the user interface.

Talking to the GitHub API

A Swift class will be created to talk to the GitHub API. This will connect to the root endpoint host and download the JSON for the service URLs so that subsequent network connections can be made.

To ensure that network requests are not repeated, an NSCache will be used to save the responses. This will automatically be emptied when the application is under memory pressure:

import Foundation
class GitHubAPI {
  let base:NSURL
  let services:[String:String]
  let cache = NSCache()
  class func connect() -> GitHubAPI? {
    return connect("")
  class func connect(url:String) -> GitHubAPI? {
    if let nsurl = NSURL(string:url) {
      return connect(nsurl)
    } else {
      return nil
  class func connect(url:NSURL) -> GitHubAPI? {
    if let data = NSData(contentsOfURL...