unity编辑器拓展

需求:重写 UGUI中 Toggle 类 MyToggle 使其添加一条属性Panel
代码:

using UnityEngine;
using UnityEngine.UI;
public class MyToggle : Toggle
{
    public Transform panel;
}

创建MyToggleEditor脚本

using UnityEditor;
using UnityEngine;

//CustomEditor:允许我们自定义组件的Inspect检视面板
[CustomEditor(typeof(MyToggle), true)] ///MyToggle 需要显示在Inspector的类
//CanEditMultipleObjects:可多选编辑选中物体中该属性面板
[CanEditMultipleObjects]

//重写toggle则继承UnityEditor.UI.ToggleEditor toggle编辑类(公共类则继承对应公共类Editor,自定义类则继承Editor)
public class MyToggleEditor : UnityEditor.UI.ToggleEditor
{
    SerializedProperty Panel;  // SerializedProperty 反射一个Unity对象
    private void OnEnable()
    {
        base.OnEnable();
        //FindProperty  CustomEditor指定的GameObject脚本(MyToggle)中获取对象(Panel)以在检查器中显示。
        Panel = serializedObject.FindProperty("Panel"); //查找到MyToggle中的Panel
    }

    public override void OnInspectorGUI()
    {
        base.OnInspectorGUI();
        serializedObject.Update();
        EditorGUILayout.PropertyField(Panel);
        serializedObject.ApplyModifiedProperties();
        if (GUI.changed)
        {
            EditorUtility.SetDirty(target);
        }
    }
}

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