上代码

using UnityEditor;
using UnityEngine;

/// <summary>
/// Inspactor只读属性
/// </summary>
public class DisplayOnly:PropertyAttribute
{

}
[CustomPropertyDrawer(typeof(DisplayOnly))]
public class ReadOnlyDrawer : PropertyDrawer
{
    public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
    {
        return EditorGUI.GetPropertyHeight(property, label, true);
    }
    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
    {
        GUI.enabled = false;
        EditorGUI.PropertyField(position, property, label, true);
        GUI.enabled = true;
    }
}

使用添加 [DisplayOnly]就行