任意のコンポーネントのプロパティ名一覧を取得する (同じオブジェクトにつけてReload->コンポーネント選択->Show Properties)

ComponentProperties.cs

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

public class ComponentProperties : MonoBehaviour {

    [HideInInspector]
    public Component[] components;
    
    [HideInInspector]
    public string[] componentNames;

    // アタッチ時に実行
    public void Reset()
    {
        var componentPropertiesTypeName = GetType().ToString();
        components = gameObject
                        .GetComponents<Component>()
                        .Where(x => x.GetType() != GetType())
                        .ToArray();
        componentNames = components
                            .Select(x => x.GetType().Name)
                            .ToArray();
    }
}

#if UNITY_EDITOR
[CustomEditor(typeof(ComponentProperties))]
public class ComponentPropertiesEditor : Editor
{
    private int selectedComponent = 0;
    private string[] propertyNames = null;

    public override void OnInspectorGUI()
    {
        base.OnInspectorGUI();

        var behaivor = target as ComponentProperties;

        using (new EditorGUILayout.HorizontalScope())
        {
            GUILayout.FlexibleSpace();
            if (GUILayout.Button("Reload"))
            {
                behaivor.Reset();
            }
        }

        EditorGUILayout.Space();

        selectedComponent = EditorGUILayout.Popup("Target", selectedComponent, behaivor.componentNames);

        if (GUILayout.Button("Show Properties"))
        {
            propertyNames = ShowComponentPropertices(behaivor.components[selectedComponent]);
        }

        if (propertyNames != null)
        {
            foreach (var propertyName in propertyNames)
            {
                EditorGUILayout.LabelField(propertyName);
            }
        }
    }

    // reference: http://light11.hatenadiary.com/entry/2018/03/15/225709
    private string[] ShowComponentPropertices(Component component)
    {
        List<string> propertyNames = new List<string>();
        var serializedObject = new SerializedObject(component);
        var iterator = serializedObject.GetIterator();
        while (iterator.NextVisible(true))
        {
            propertyNames.Add("("+ iterator.type + ") "+iterator.propertyPath);
        }
        return propertyNames.ToArray();
    }
}
#endif