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APIアプリ

Posted at

1,WebAPIの仕組み

YahooのDeveloper Network
天気情報を提供するAPI

Yahoo Weather API for your apps

WebAPIによるデータ取得

  • HTTPリクエスト アプリからサーバーを呼び出す
  • HTTPレスポンス  JSON,XML

今回はJSONで受けとりデータのパース処理をする

2,HTTPリクエスト

let url = "\(url)"
getURL(url:url)

JSONデータを取得するコーdp

func getURL(url:String){

func getURL(url:String){
        
        do{
            let apiurl = URL(string:url)
            let data = try Data(contentsOf: apiurl!)//データを得る
            //
            let json = try JSONSerialization.jsonObject(with: data) as! [String:Any]
        //取得したデータをキーと値で表示できる [Stringがキー Anyが値]
            print(json)
        } catch{
            self.sunriseTimeLabel.text = "取得できませんでした"
        }
    }
}

外部通信を許可しないと外部のサーバーへの通信ができない。

4,外部通信を許可する

プロジェクトの設定を変更
Info.plist
二つを追加する
スクリーンショット 2022-10-12 23.36.25.png

5,データを取り出す

query:{ results:{channel:{}}中身}を取り出す

let query = json["query"] as! [String:Any]
let results = query["results"] as! [String:Any]
            let channel = results["channel"] as! [String:Any]
            let astonomy = channel["astoronomy"] as! [String:Any]
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