Unity输出场景中选中的物体数量

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;

[CanEditMultipleObjects]

public class SelectionCount : Editor {

   
    [MenuItem("GameObject/Get Selection Count",false,0)]
    static public void GetSelectionCount(MenuCommand menuCommand)
    {
        //Prevent executing multiple times when right-clicking.
        if (Selection.objects.Length > 1)
        {
            if (menuCommand.context != Selection.objects[0])
            {
                return;
            }
        }
        Debug.Log("<color=yellow>选中的数量为" + Selection.objects.Length + "</color>");
    }

}