C# 无法通过游戏菜单在Unity中生成基本人物

老板让我做一个项目，用原始对象和一个独特的对象创建一个基本场景。我创建了对象以及第一人称相机/角色等。唯一错误的是，每次我运行脚本并启动游戏时，每次我单击菜单切换按钮时，所有需要放置的表单都会不断生成，无论玩家在哪里观看。我想要的是玩家切换菜单，点击选项，点击后，对象出现（单个对象），玩家可以将其放置在场景中的任何位置

这是unity的C代码。我认为这是代码的产卵是什么不断循环，但我希望它停止循环

public class menuScript : MonoBehaviour {
public GameObject[] items;
private itemplacement itemPlacement;
private bool menuWindowToggle = false;
private Rect menuWindowRect = new Rect(300,100,400,400);

private Dictionary<int,string> inventoryNameDictionary;

// icons
public Texture2D cubeIcon;
public Texture2D columnIcon;
public Texture2D sphereIcon;
public Texture2D robotIcon;


// Use this for initialization
void Start () {
    itemPlacement = GetComponent<itemplacement> ();
}

// Update is called once per frame
void Update () {

}
void OnGUI()
{
    for (int i = 0; i <items.Length; i ++) {
        menuWindowToggle = GUI.Toggle (new Rect (800, 50, 100, 50), menuWindowToggle, "Item Menu");
        if (menuWindowToggle) {
            menuWindowRect = GUI.Window (0, menuWindowRect, menuWindowMethod, "Item Menu");

            itemPlacement.SetItem (items [i]);
        }
    }
}
void menuWindowMethod (int windowId)
{
    Dictionary<int,string> inventoryNameDictionary = new Dictionary<int,string> ()
    {
        {0, string.Empty},
        {1, string.Empty},
        {2, string.Empty},
        {3, string.Empty}
    };

    itemClass cube = new itemClass (0, "Cube", cubeIcon, "Top of the line IKEA CUBE, made to break easily");
    itemClass column = new itemClass (1, "Column", columnIcon, "Best Persian Column in world, no need paint, it perfect!!!");
    itemClass sphere = new itemClass (2, "Sphere", sphereIcon, "ITS SPHERICAL.... SPHERICAL!!!");
    itemClass robot = new itemClass (3, "Robot", robotIcon, "Mysterious thing, comes from emails about projects");
    //display inventory
    inventoryNameDictionary [0] = cube.name;
    inventoryNameDictionary [1] = column.name;
    inventoryNameDictionary [2] = sphere.name;
    inventoryNameDictionary [3] = robot.name;

    GUILayout.BeginArea (new Rect (5, 50, 395, 400));
    GUILayout.BeginVertical ();
    GUILayout.Button (inventoryNameDictionary[0], GUILayout.Height (50));
    GUILayout.Button (inventoryNameDictionary[1], GUILayout.Height (50));
    GUILayout.Button (inventoryNameDictionary[2], GUILayout.Height (50));
    GUILayout.Button (inventoryNameDictionary[3], GUILayout.Height (50));
    GUILayout.EndVertical ();
    GUILayout.EndArea ();
}
public class itemClass
{
    public int item;
    public string name;
    public Texture2D icon;
    public string description;

    public itemClass( int ide, string nam, Texture2D ico, string des)
    {
        item = ide;
        name = nam;
        icon = ico;
        description = des;
    }
}

---

}

我实际上并不熟悉旧的GUI内容（Unity显然不再推荐使用它），所以我在这里查找：

我对您发布的代码的理解是GUI.Window（）绘制您的窗口，使用menuWindowMethod（）绘制内容，但这只绘制窗口。它不会等待用户在它内部做一些事情。因此，在这里编写代码时，将立即继续执行SetItem调用

由于OnGUI在每一帧都会被调用，并且Toggle控件总是返回其当前值，因此在打开它的那一刻，您将运行该循环，并为每一帧的items中的每个项调用一次SetItem

---

我怀疑您真正想做的是连接这些按钮，以便在单击itemplacement组件时在其上设置新的currentItem，然后等待用户再次单击以调用SetItem。我认为您实际上不希望在OnGUI函数中使用for循环。

正确，我希望将其放置在用户单击的每个按钮生成指定游戏对象的位置，并允许他们将其放置在地形上任何想要的位置。如何使用此代码？

public class itemplacement : MonoBehaviour {
private Transform currentItem;

// Use this for initialization
void Start () {

}

// Update is called once per frame
void Update () {
    if (currentItem = null) {
        Vector3 m = Input.mousePosition;
        m = new Vector3(m.x,m.y,transform.position.y);
        Vector3 p = camera.ScreenToWorldPoint(m);
        currentItem.position = new Vector3(p.x,0,p.z);
    }
}
public void SetItem(GameObject b){
    currentItem = ((GameObject)Instantiate(b)).transform;
}