[Editor拡張] InspectorにUI取得ボタンを表示して押したらUIを取得

使用すると下画像のようにInspectorにボタンを追加します。

以下　サンプルコード

Sample.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
#if UNITY_EDITOR
using UnityEditor;
#endif

namespace Test
{
    public class Sample : MonoBehaviour
    {
#if UNITY_EDITOR
        public void SetInspectorUI()
        {
                // ここに処理を記載
                Debug.Log("On Click");
        }
#endif
    }

#if UNITY_EDITOR
    [CustomEditor(typeof(Sample))]
    public class SampleEditor : Editor
    {
        public override void OnInspectorGUI()
        {
            base.OnInspectorGUI();

            if (GUILayout.Button("Set UI"))
            {
                Sample t = target as Sample;
                t.SetInspectorUI();
            }
        }
    }
#endif
}

UIを取得するならこういう書き方かな？というサンプル

Sample.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
#if UNITY_EDITOR
using UnityEditor;
#endif

namespace Test
{
    public class Sample : MonoBehaviour
    {
        public Text A;
        public Text B;
        public Text C;

#if UNITY_EDITOR
        public void SetInspectorUI()
        {
            var texts = GetComponentsInChildren<Text>();

            foreach (var t in texts)
            {
                if (t.name == "A")
                {
                    A = t;
                }
                else if (t.name == "B")
                {
                    B = t;
                }
                else if (t.name == "C")
                {
                    C = t;
                }
            }
        }
#endif
    }

#if UNITY_EDITOR
    [CustomEditor(typeof(Sample))]
    public class SampleEditor : Editor
    {
        public override void OnInspectorGUI()
        {
            base.OnInspectorGUI();

            if (GUILayout.Button("Set UI"))
            {
                Sample t = target as Sample;
                t.SetInspectorUI();
            }
        }
    }
#endif
}