Connection 12 Get an updated date and time of the data

Swift 3.0 // ViewController.swift // Connection012 // // Created by Misato Morino on 2016/08/15. // Copyright © 2016年 Misato Morino. All rights reserved. // import UIKit class ViewController: UIViewController, NSURLConnectionDataDelegate{ var myTextView:UITextView! override func viewDidLoad() { super.viewDidLoad() // 画像のURLを初期化. let url = NSURL(string: "http://blogimg.goo.ne.jp/user_image/6b/5d/d7ecfd5f7dc8c1fd7384e5642abfe638.jpg") // 参照するイメージを表示. let imageData: NSData = NSData(contentsOf: url as! URL)! let image: UIImage = UIImage(data: imageData as Data)! let imageView: UIImageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 100, height: 120)) imageView.image = image imageView.layer.position = CGPoint(x: self.view.bounds.width/2, y: 200.0) self.view.addSubview(imageView) // 更新日の表示用TextViewを用意. myTextView = UITextView(frame: CGRect(x: 0, y: 0, width: 300, height: 50)) myTextView.textAlignment = NSTextAlignment.center myTextView.layer.position = CGPoint(x: self.view.bounds.width/2, y: 400.0) myTextView.isEditable = false self.view.addSubview(myTextView) // サーバーへのリクエストを初期化. let req = NSMutableURLRequest(url: url as! URL) // ヘッダー情報を得るように初期化. req.httpMethod = "HEAD" // サーバーへ通信. NSURLConnection(request: req as URLRequest, delegate: self) } /* サーバからレスポンスが送られてきたとき呼び出されるメソッド. */ func connection(_ connection: NSURLConnection, didReceive response: URLResponse) { // URLのヘッダー情報を得る. let head = response as! HTTPURLResponse // 更新日時を得る. myTextView.text = head.allHeaderFields["Last-Modified"] as! NSString as String print(head.allHeaderFields["Last-Modified"] as! NSString) } }t Swift 2.3 // // ViewController.swift // Connection012 // // Created by Misato Morino on 2016/08/15. // Copyright © 2016年 Misato Morino. All rights reserved. // import UIKit class ViewController: UIViewController, NSURLConnectionDataDelegate{ var myTextView:UITextView! override func viewDidLoad() { super.viewDidLoad() // 画像のURLを初期化. let url = NSURL(string: "http://blogimg.goo.ne.jp/user_image/6b/5d/d7ecfd5f7dc8c1fd7384e5642abfe638.jpg") // 参照するイメージを表示. let imageData: NSData = NSData(contentsOfURL: url!)! let image: UIImage = UIImage(data: imageData)! let imageView: UIImageView = UIImageView(frame: CGRectMake(0,0,100,120)) imageView.image = image imageView.layer.position = CGPoint(x: self.view.bounds.width/2, y: 200.0) self.view.addSubview(imageView) // 更新日の表示用TextViewを用意. myTextView = UITextView(frame: CGRectMake(0, 0, 300, 50)) myTextView.textAlignment = NSTextAlignment.Center myTextView.layer.position = CGPoint(x: self.view.bounds.width/2, y: 400.0) myTextView.editable = false self.view.addSubview(myTextView) // サーバーへのリクエストを初期化. let req = NSMutableURLRequest(URL: url!) // ヘッダー情報を得るように初期化. req.HTTPMethod = "HEAD" // サーバーへ通信. NSURLConnection(request: req, delegate: self) } /* サーバからレスポンスが送られてきたとき呼び出されるメソッド. */ func connection(connection: NSURLConnection, didReceiveResponse response: NSURLResponse) { // URLのヘッダー情報を得る. let head = response as! NSHTTPURLResponse // 更新日時を得る. myTextView.text = head.allHeaderFields["Last-Modified"] as! NSString as String print(head.allHeaderFields["Last-Modified"] as! NSString) } } 2.xと3.xの差分 HTTPMethod から httpMethod に変更

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