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c# - 如何检查以避免层次结构中的游戏对象重复？

问题描述

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using TMPro;

[ExecuteAlways]
public class AddTextToObject : MonoBehaviour
{
    public UnityEngine.GameObject[] objectsToNumber;
    public UnityEngine.GameObject text;
    public float yPadding;
    public bool rotateNumbers = false;
    public float rotationSpeed = 10f;
    public bool textAbove = false;
    public bool textInFront = false;
    public bool textOnFaces = false;

    private List<GameObject> newTexts = new List<GameObject>();
    private MeshRenderer[] renderer;
    private Vector3 newPos;

    private void Start()
    {
        renderer = new MeshRenderer[objectsToNumber.Length];

        for (int i = 0; i < objectsToNumber.Length; i++)
        {
            GameObject newText = Instantiate(text);
            renderer[i] = newText.GetComponent<MeshRenderer>();

            if (textAbove == true)
            {
                newPos = new Vector3
                (
                 objectsToNumber[i].transform.position.x,
                 ((objectsToNumber[i].transform.position.y + renderer[i].bounds.extents.y) + yPadding),
                   objectsToNumber[i].transform.position.z
                 );
            }

            if (textInFront == true)
            {
                newPos = new Vector3
                (
                 ((objectsToNumber[i].transform.position.x + renderer[i].bounds.extents.x) + yPadding),
                 objectsToNumber[i].transform.position.y,
                   objectsToNumber[i].transform.position.z
                 );
            }

            newText.transform.position = newPos;
            newText.transform.parent = objectsToNumber[i].transform;
            newText.name = objectsToNumber[i].name + " Text";
            newText.tag = "ObjectToAddText";
            newTexts.Add(newText);
            var textmesh = newText.GetComponent<TextMesh>();
            //textmesh.transform.localRotation = Quaternion.Euler(0, -90, 0);

            if (textAbove == true)
            {
                textmesh.text = i.ToString();
            }

            if (textInFront == true)
            {
                textmesh.text = objectsToNumber[i].name;
            }
        }
    }

    private void Update()
    {
        if (rotateNumbers == true)
        {
            for (int i = 0; i < newTexts.Count; i++)
            {
                newTexts[i].transform.Rotate(Vector3.up, 10 * rotationSpeed * Time.deltaTime);
            }
        }
    }
}

问题是它在编辑器模式下进行了实例化，但是如果我正在运行游戏，它会再次实例化文本，然后会有双倍的文本。

GameObject newText = Instantiate(text);

我只想实例化文本一次。如果运行游戏不再创建相同的文本。

我正在实例化文本游戏对象。

标签： c#unity3d

解决方案

使用平台相关编译，以便仅在编辑器中运行的代码永远不会编译为构建。这避免了构建中的膨胀代码。

然后，用于EditorApplication.isPlaying确保仅在编辑模式下运行的代码不会在播放模式下运行。

#if UNITY_EDITOR //Avoid garbage in the builds
    //Editor logic
    if(!EditorApplication.isPlaying) //If NOT in play mode
        GameObject newText = Instantiate(text);
#endif

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