Unity（二十四）：Attribute特性

Attribute

• Assets/Scripts/CubeScript.cs

  using UnityEngine;
  
  public class CubeScript : MonoBehaviour
  {
      [HpMp("血量", 0, 100)] public int Hp;
      [HpMpAttribute("魔法值", 0, 100)] public int Mp;
  }
  
  public class HpMpAttribute : PropertyAttribute
  {
      public readonly string Name;
      public readonly int Min;
      public readonly int Max;
  
      public HpMpAttribute(string name, int min, int max)
      {
          Name = name;
          Min = min;
          Max = max;
      }
  }
  

• Assets/Editor/RangIntDrawer.cs

  using UnityEditor;
  using UnityEngine;
  
  [CustomPropertyDrawer(typeof(HpMpAttribute))]
  class HpMpDrawer : PropertyDrawer
  {
      public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
      {
          string name = ((HpMpAttribute)attribute).Name;
          int min = ((HpMpAttribute)attribute).Min;
          int max = ((HpMpAttribute)attribute).Max;
          property.intValue = Mathf.Clamp(property.intValue, min, max);
  
          Rect rect1 = new Rect(position.x, position.y + 5, position.width, 20);
          EditorGUI.IntSlider(rect1, property, min, max, $"{name}({property.name})");
  
          float value = ((float)property.intValue - min) / (max - min);
          Rect rect2 = new Rect(position.x, position.y + 30, position.width, 20);
          EditorGUI.ProgressBar(rect2, value, $"{name}：{property.intValue}");
      }
  
      public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
      {
          return 50f;
      }
  }