unity 编辑器之自定义脚本界面_unity createpropertygui

自定义脚本界面有两种方法，一种是继承PropertyDrawer,一种是继承editor

下面介绍继承自PropertyDrawer

PropertyDrawer有两种用途，一种是自定义绘制带有Serializable属性的类，一种是自定义继承自PropertyAttribute的类

1.绘制带有Serializable属性的类在重新绘制该类的时候，绘制类要继承自PropertyDrawer，且加上CustomPropertyDrawer属性

using System;
using UnityEngine;
 
public enum IngredientUnit { Spoon, Cup, Bowl, Piece }
 
// 自定义绘制类，没有继承mono
[Serializable]
public class Ingredient
{
    public string name;
    public int amount = 1;
    public IngredientUnit unit;
}
 
//继承mono,默认绘制
public class Recipe : MonoBehaviour
{
    public Ingredient potionResult;
    public Ingredient[] potionIngredients;
}
 
 
 
using UnityEditor;
using UnityEditor.UIElements;
using UnityEngine.UIElements;
 
// IngredientDrawerUIE
[CustomPropertyDrawer(typeof(Ingredient))]
public class IngredientDrawerUIE : PropertyDrawer
{
    public override VisualElement CreatePropertyGUI(SerializedProperty property)
    {
        // Create property container element.
        var container = new VisualElement();
 
        // Create property fields.
        var amountField = new PropertyField(property.FindPropertyRelative("amount"));
        var unitField = new PropertyField(property.FindPropertyRelative("unit"));
        var nameField = new PropertyField(property.FindPropertyRelative("name"), "Fancy Name");
 
        // Add fields to the container.
        container.Add(amountField);
        container.Add(unitField);
        container.Add(nameField);
 
        return container;
    }
}

2.绘制继承自PropertyAttribute类的属性

比如系统自带的属性 Range

下面我们自己实现一个和Range属性一样的属性

using UnityEngine;
 
public class RangeAttribute : PropertyAttribute
{
    public float min;
    public float max;
 
    public RangeAttribute(float min, float max)
    {
        this.min = min;
        this.max = max;
    }
}
 
[CustomPropertyDrawer(typeof(RangeAttribute))]
public class RangeDrawer : PropertyDrawer
{
    // Draw the property inside the given rect
    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
    {
        // First get the attribute since it contains the range for the slider
        RangeAttribute range = attribute as RangeAttribute;
 
        // Now draw the property as a Slider or an IntSlider based on whether it's a float or integer.
        if (property.propertyType == SerializedPropertyType.Float)
            EditorGUI.Slider(position, property, range.min, range.max, label);
        else if (property.propertyType == SerializedPropertyType.Integer)
            EditorGUI.IntSlider(position, property, Convert.ToInt32(range.min), Convert.ToInt32(range.max), label);
        else
            EditorGUI.LabelField(position, label.text, "Use Range with float or int.");
    }
}