NSScreencast Episode #128 Swift Networking

Swift Networking - NSScreencast

jsonデータをSwiftでダウンロードする

• let task = session.dataTaskWithURL(url) {
  • (let data, let response, let error) in
    • if let httpResponse = response as? NSHTTPURLResponse {
    • self.running = false
  • running = true
  • task.resume()
• class Downloader
  • init _ url: String
    • optional
• lazy initialize (initialize on first time call)
  • @lazy var config = NSURLSessionConfiguration.defaultSessionConfiguration()
  • @lazy var session: NSURLSession = NSURLSession(configuration: self.config)
• typealias
  • typealias JSONArrayCompletion = (Array?) -> ()
• AnyObject The Swift Programming Language: Type Casting
  • Array
  • NSArray for untyped data
• closure
  • The Swift Programming Language: Closures