(初心者向け)Swift3.0で初アプリ - スマホで押したボタンの情報を送付

Swift3.0を使って簡単なiPhoneアプリを作ってみます
スマホで押したボタンの情報をサーバーへ送付します

#1. ボタン押下情報の送付
- Xcodeで新しいSingleViewアプリケーションを用意します
- Buttonを３個用意し、下記の`button1`、`button2`、`button3`へ接続します
- ViewController.swiftに下記をコピペします

```swift:文字列の入力
import UIKit
import Alamofire

class ViewController: UIViewController {

    let url = "http://192.168.2.1:1880/test10"  //送付先を指定
    let headers: HTTPHeaders = [
        "name": "value"
    ]
    var whichButton:String = ""
    
    @IBAction func button1(_ sender: UIButton) {
        whichButton = "ボタン１"
        sendJson()
    }
    
    @IBAction func button2(_ sender: UIButton) {
        whichButton = "ボタン２"
        sendJson()
    }
    
    @IBAction func button3(_ sender: UIButton) {
        whichButton = "ボタン３"
        sendJson()
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    // 送信処理
    //func sendJson(sender:UIButton){
    func sendJson(){
        let parameters: Parameters = [
            "moji_param": whichButton,   // 文字パラメータの例
            "suji_param": 123,          // 数値パラメータの例
            "nested": [
                "nested_param": "ごきげんよう" // ネストしたパラメータの例
            ]
        ]
        // Alamofireでの送信処理
        Alamofire.request(url,
                          method: .post,    // POSTメソッド
            parameters: parameters,
            encoding: JSONEncoding.default,
            headers: headers)
            .authenticate(user: "user", password: "password")
            .responseJSON { response in
                if
                    let json = response.result.value as? [String: Any],
                    let prop1 = json["prop1"] as? String
                {
                    debugPrint(prop1)
                }
                debugPrint(response)
        }
    }
}
```

#2. Node-REDで受け取ります
- 下記のNode-REDフローをコピペして動かします

```:スマホからのボタン情報を受信
[{"id":"662f2b11.b3d67c","type":"http in","z":"6daf1ea.58ba66","name":"","url":"/test10","method":"post","upload":false,"swaggerDoc":"","x":170,"y":60,"wires":[["386498ec.918b48","b89e76f5.b8f22","a5db31ef.24402","d69ff1de.1f35c"]]},{"id":"f814e629.f0152","type":"http response","z":"6daf1ea.58ba66","name":"","statusCode":"","headers":{},"x":790,"y":60,"wires":[]},{"id":"1cc428b9.c7b2ff","type":"template","z":"6daf1ea.58ba66","name":"htmlを返す","field":"payload","fieldType":"msg","format":"handlebars","syntax":"mustache","template":"<html>\n    <body>\n        <h1>\n        祝！開通！！\n        </h1>\n    </body>\n</html>","output":"str","x":610,"y":60,"wires":[["f814e629.f0152"]]},{"id":"386498ec.918b48","type":"debug","z":"6daf1ea.58ba66","name":"","active":true,"console":"false","complete":"payload.moji_param","x":310,"y":200,"wires":[]},{"id":"b89e76f5.b8f22","type":"function","z":"6daf1ea.58ba66","name":"","func":"msg.hgt = msg.payload.hgt;\nreturn msg;","outputs":1,"noerr":0,"x":430,"y":60,"wires":[["1cc428b9.c7b2ff"]]},{"id":"a5db31ef.24402","type":"template","z":"6daf1ea.58ba66","name":"ボタンを抽出","field":"payload","fieldType":"msg","format":"handlebars","syntax":"mustache","template":"{{payload.moji_param}}が押されました","output":"str","x":280,"y":260,"wires":[["a135aa.73a59258"]]},{"id":"a135aa.73a59258","type":"debug","z":"6daf1ea.58ba66","name":"","active":true,"console":"false","complete":"false","x":490,"y":260,"wires":[]},{"id":"d69ff1de.1f35c","type":"debug","z":"6daf1ea.58ba66","name":"","active":true,"console":"false","complete":"false","x":270,"y":140,"wires":[]}]


```

- MacbookのNode-REDへ入力された文字列データが送付されることを確認します

<img width="1377" alt="スクリーンショット 2017-10-13 15.05.03.png" src="https://qiita-image-store.s3.amazonaws.com/0/125842/977d1030-664e-c591-c200-db58001a98f6.png">