SwiftでJSONパース

Question

import UIKit
import TwitterKit

class ViewController: UIViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.setNeedsStatusBarAppearanceUpdate();
        let logInButton = TWTRLogInButton { (session, error) in
            if let unwrappedSession = session {
                let alert = UIAlertController(title: "Logged In",
                                              message: "User \(unwrappedSession.userName) has logged in",
                    preferredStyle: UIAlertControllerStyle.alert
                )
                alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil))
                self.present(alert, animated: true, completion: nil)
                
            } else {
                print("Login error: %@", error!.localizedDescription);
            }
        }
        logInButton.loginMethods = [.webBased]
        
        let button = logInButton
        button.center = self.view.center
        self.view.addSubview(button)
        //ここからツイート投稿のための準備
        let endpoint = "https://api.twitter.com/1.1/statuses/home_timeline.json"

        let client = TWTRAPIClient.init(userID: "111111111")
                
        var clientError : NSError?
        
        let params = ["count": "10"]
        
        let request = client.urlRequest(withMethod: "GET", url: endpoint, parameters: params, error: &clientError)
        
        client.sendTwitterRequest(request) {
            (response, data, connectionError) -> Void in
            if connectionError != nil {
                print("エラー: \(connectionError)")
            } else {
                
                let json: AnyObject? = try! JSONSerialization.jsonObject(with: data!, options: JSONSerialization.ReadingOptions.allowFragments) as AnyObject?
                print(json!)
            }
        }
        
    }
}

このようにTwitterのタイムラインのJSONを受信することはできたのですが、Swiftでforeachで配列を回して、ツイート本文やユーザーネームを取り出して表示するにはどのようにすればいいのでしょうか？

JSONはこのような感じです
[
{
"place" : null,
"contributors" : null,
"source" : "<a href="http://twitter.com" rel="nofollow">Twitter Web Client</a>",
"truncated" : false,
"is_quote_status" : false,
"favorite_count" : 0,
"lang" : "ja",
"entities" : {
"symbols" : [

  ],
  "user_mentions" : [

  ],
  "urls" : [

  ],
  "hashtags" : [

  ]
},
"in_reply_to_screen_name" : null,
"retweet_count" : 0,
"favorited" : false,
"geo" : null,
"id" : 852734851786579974,
"user" : {
  "protected" : false,
  "is_translator" : false,
  "profile_image_url" : "http:\/\/pbs.twimg.com\/profile_images\/850998804878774272\/-bABtccG_normal.jpg",
  "created_at" : "Mon Apr 05 08:12:28 +0000 2010",
  "id" : 129746204,
  "default_profile_image" : false,
  "listed_count" : 1542,
  "profile_background_color" : "131516",
  "follow_request_sent" : false,
  "location" : "PSO2",
  "entities" : {
    "url" : {
      "urls" : [
        {
          "url" : "http:\/\/www.pixiv.net\/member.php?id=76712",
          "indices" : [
            0,
            40
          ],
          "expanded_url" : null
        }
      ]
    },
    "description" : {
      "urls" : [
        {
          "display_url" : "ask.fm\/patrietta",
          "url" : "https:\/\/t.co\/fLNYk70nQJ",
          "indices" : [
            67,
            90
          ],
          "expanded_url" : "http:\/\/ask.fm\/patrietta"
        }
      ]
    }
  },
  "url" : "http:\/\/www.eeee.net\/member.php",
  "description" : "とあるuser",
  "followers_count" : 69707,
  "geo_enabled" : false,
  "lang" : "ja",
  "profile_text_color" : "333333",
  "statuses_count" : 55066,
  "following" : true,
  "notifications" : false,
  "profile_background_tile" : true,
  "profile_use_background_image" : true,
  "id_str" : "129746204",
  "name" : "あるuser",
  "profile_image_url_https" : "https:\/\/pbs.twimg.com\/profile_images\/850998804878774272\/-yff8f6fyh.jpg",
  "profile_sidebar_fill_color" : "EFEFEF",
  "profile_sidebar_border_color" : "FFFFFF",
  "contributors_enabled" : false,
  "default_profile" : false,
  "profile_banner_url" : "https:\/\/pbs.twimg.com\/profile_banners\/129746204\/1471936684",
  "screen_name" : "ここがスクリーンネーム",
  "time_zone" : "Tokyo",
  "profile_background_image_url" : "http:\/\/pbs.twimg.com\/profile_background_images\/454304509376741376\/lTp51aDO.jpeg",
  "profile_background_image_url_https" : "https:\/\/pbs.twimg.com\/profile_background_images\/454304509376741376\/lTp51aDO.jpeg",
  "profile_link_color" : "F5ABB5",
  "favourites_count" : 3889,
  "is_translation_enabled" : false,
  "translator_type" : "none",
  "utc_offset" : 32400,
  "friends_count" : 1233,
  "verified" : false,
  "has_extended_profile" : true
},
"in_reply_to_user_id" : null,
"retweeted" : false,
"text" : "ツイート本文",
"created_at" : "Fri Apr 14 04:06:46 +0000 2017",
"in_reply_to_status_id_str" : null,
"in_reply_to_status_id" : null,
"in_reply_to_user_id_str" : null,
"id_str" : "852734851786579974",
"coordinates" : null

}
]

Comments

[fuzzball]

ダミーのJSONなどを用意して、こちらで再現出来るようにして下さい。

[gtime]

ありがとうございます。JSONを追加しました

Answer 1

let json = try JSONSerialization.jsonObject(with: data!, options: .allowFragments) as! [[String:Any]]

for obj in json {
    //screen_name
    if let user = obj["user"] as? [String:Any] {
        let screen_name = user["screen_name"] ?? "(empty)"
        print("screen_name =", screen_name)
    } else {
        print("does not exist 'user'")
    }
    //text
    let text = obj["text"] ?? "(empty)"
    print("text =", text)
}

Comments

[gtime]

ありがとうございます
パースすることができました