UnityのJsonUtilityでJSON配列を処理する

本Qiitaについて

JSONの配列をJsonUtilityで処理する方法について記載

関連Qiita

• DayDream開発機の設定
• UnityでのDayDreamデモアプリのBuild
• DayDream Readyのスマフォ
• DayDream開発機の作り方
• DayDream関連リンク
• Unity向けのWebSocketライブラリの組み込み
• UnityでRESTでアクセス

JsonUtility

{[
{a:11,b:12},
{a:21,b:22},
{a:31,b:32},
]}

は処理できない。

{Items:[
{a:11,b:12},
{a:21,b:22},
{a:31,b:32},
]}

は処理できる。

Livedoorのお天気WebAPIを使ってサンプルを作る

会津若松の天気のJSON
http://weather.livedoor.com/forecast/webservice/json/v1?city=070030

"forecasts" :の配列を取得し格納してみる

JsonHelper.cs

using System;
using UnityEngine;
using System.Collections;

public static class JsonHelper
{
	public static T[] FromJson<T>(string json)
	{
		Wrapper<T> wrapper = UnityEngine.JsonUtility.FromJson<Wrapper<T>>(json);
		return wrapper.forecasts;
	}

	[Serializable]
	private class Wrapper<T>
	{
		public T[] forecasts;
	}
}

RestClient.cs

using UnityEngine;
using System.Collections;
using UnityEngine.Networking;
using System.Text;

[System.Serializable]
public class tenki
{
	public string dateLabel;
	public string telop;
	public string date;
}

public class RestClient : MonoBehaviour {

	public tenki[] tenkiInstance;

	// Use this for initialization
	void Start () {
		
	}
	
	// Update is called once per frame
	void Update () {
		if (Input.GetKeyUp("g"))
		{
			Debug.Log ("GET");
			StartCoroutine(Get("http://weather.livedoor.com/forecast/webservice/json/v1?city=070030"));
		}
	}

	public IEnumerator Get (string url) {
		Debug.Log ("GET");

		var request = new UnityWebRequest();
		request.downloadHandler = new DownloadHandlerBuffer();
		request.url = url;
		request.SetRequestHeader("Content-Type", "application/json; charset=UTF-8");
		request.method = UnityWebRequest.kHttpVerbGET;
		yield return request.Send();

		if(request.isError) {
			Debug.Log(request.error);
		}
		else {
			if (request.responseCode == 200) {
				Debug.Log ("success");
				Debug.Log ("--------------------------------");
				Debug.Log(request.downloadHandler.text);
				Debug.Log ("--------------------------------");
				tenkiInstance = JsonHelper.FromJson<tenki>(request.downloadHandler.text);

				for (int i = 0; i < tenkiInstance.Length; i++) {
					Debug.Log (tenkiInstance [i].dateLabel);
					Debug.Log (tenkiInstance [i].telop);
					Debug.Log (tenkiInstance [i].date);
				}
			} else {
				Debug.Log ("failed");
			}
		}
	}
}

ToDo

入れ子の配列の処理.