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【Unity】iOS,Androidでuuidを取得する方法

Last updated at Posted at 2021-07-29

Android

SystemInfo.deviceUniqueIdentifier

iOS

SystemInfo.deviceUniqueIdentifier
ではOSのアップデート時に値が変わるそうなので一工夫が必要です。

前提条件

iOSのキーチェーンを取り扱うアセットを使います。

手順

1.キーチェーンからuuidを取得する。
2.uuidがなければ「Guid.NewGuid()」でuuidを発行する。
3.発行したuuidをキーチェーンに保存する。

これでアプリを端末から削除しても変わらないuuidが使えます。

サンプルソース

using UnityEngine;
using FSG.iOSKeychain;
using System;

public class TestManager : MonoBehaviour
{
    public static readonly string KEY_ID = "CustomID";

    void Start()
    {
        string id = string.Empty;

#if UNITY_IOS
        id = Keychain.GetValue(KEY_ID);

        if (string.IsNullOrWhiteSpace(id))
        {
            id = Guid.NewGuid().ToString();

            Keychain.SetValue(KEY_ID, id);
        }

#elif UNITY_ANDROID
        id = SystemInfo.deviceUniqueIdentifier;
#endif

        Debug.Log($"id : {id}");
    }
}
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