层次结构顶部的Unity C＃图层游戏对象

Question

您好，基本上，最好的描述方法是用图像。几乎现在，当我使用特定项目时，附加的脚本会创建一个名为frame的新游戏对象，突出显示该特定项目。我的问题是将游戏对象设置为层次结构的末尾而不是最顶层。原因是图标图像仍然完全显示，如下所示。

基本上来说，有没有一种方法可以编码使新的游戏对象'Frame'出现在子级的顶部？

感谢您的时间

代码：

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

namespace UltimateSurvival.GUISystem
{
    /// <summary>
    /// 
    /// </summary>
    [RequireComponent(typeof(ItemContainer))]
    public class Hotbar : GUIBehaviour
    {
        [SerializeField]
        [Range(0, 100)]
        private int m_FirstSelected;

        [Header("Navigation")]

        [SerializeField]
        private bool m_EnableScrolling = true;

        [SerializeField]
        [HideSwitchAttribute("m_EnableScrolling", true)]
        [ClampAttribute(0f, 10f)]
        private float m_ScrollThreeshold = 0.3f;

        [SerializeField]
        private bool m_SelectByDigits = true;

        [Header("Selection Graphics")]

        [SerializeField] 
        private float m_SelectedSlotScale = 1f;

        [SerializeField]
        private Color m_FrameColor = Color.cyan;

        [SerializeField]
        private Sprite  m_FrameSprite;

        private ItemContainer m_HotbarContainer;
        private List<Slot> m_HotbarSlots;

        private Slot m_SelectedSlot;
        private int m_LastIndex;
        private float m_CurScrollValue;

        private Image m_Frame;


        private void Awake()
        {
            m_HotbarContainer = GetComponent<ItemContainer>();

            m_HotbarContainer.Slot_Refreshed.AddListener(On_Slot_Refreshed);
            m_HotbarContainer.Slot_PointerUp += On_Slot_PointerUp;
        }

        private IEnumerator Start()
        {
            Player.DestroyEquippedItem.SetTryer(Try_DestroyEquippedItem);
            Player.Sleep.AddStopListener(()=> TrySelectSlot(0));

            m_HotbarSlots = m_HotbarContainer.Slots;

            m_Frame = GUIUtils.CreateImageUnder("Frame", GetComponent<RectTransform>(), Vector2.zero, Vector2.zero);
            m_Frame.sprite = m_FrameSprite;
            m_Frame.color = m_FrameColor;
            m_Frame.enabled = false;

            yield return null;

            TrySelectSlot(m_FirstSelected);
        }

        private bool Try_DestroyEquippedItem()
        {
            var equippedItem = Player.EquippedItem.Get();

            if(equippedItem && m_HotbarContainer.HasItem(equippedItem))
                Player.ChangeEquippedItem.Try(null, true);

            return m_HotbarContainer.TryRemoveItem(equippedItem);
        }

        private void On_Slot_PointerUp (PointerEventData data, Slot displayer)
        {
            bool canSelectDisplayer = displayer != m_SelectedSlot && data.pointerCurrentRaycast.gameObject == displayer.gameObject;
            if(canSelectDisplayer)
                TrySelectSlot(m_HotbarSlots.IndexOf(displayer));
        }

        private void On_Slot_Refreshed (Slot slot)
        {
            if(slot == m_SelectedSlot)
                TrySelectSlot(m_HotbarSlots.IndexOf(m_SelectedSlot));
        }

        private void Update()
        {
            if(m_SelectByDigits && !Player.SelectBuildable.Active)
            {
                if(Input.anyKeyDown)
                {
                    int keyNumber;
                    if(int.TryParse(Input.inputString, out keyNumber))
                        TrySelectSlot(keyNumber - 1);
                }
            }

            if(m_EnableScrolling && !Player.SelectBuildable.Active && InventoryController.Instance.IsClosed)
            {
                var playerScrollValue = Player.ScrollValue.Get();

                m_CurScrollValue = Mathf.Clamp(m_CurScrollValue + playerScrollValue, -m_ScrollThreeshold, m_ScrollThreeshold);

                if(Mathf.Abs(m_CurScrollValue - m_ScrollThreeshold * Mathf.Sign(playerScrollValue)) < Mathf.Epsilon)
                {
                    m_CurScrollValue = 0f;
                    m_LastIndex = (int)Mathf.Repeat(m_LastIndex + (playerScrollValue >= 0f ? 1 : -1), m_HotbarSlots.Count);

                    TrySelectSlot(m_LastIndex);
                }
            }
        }

        private void TrySelectSlot(int index)
        {
            index = Mathf.Clamp(index, 0, m_HotbarSlots.Count - 1);

            var newSlot = m_HotbarSlots[index];
            Player.ChangeEquippedItem.Try(newSlot.CurrentItem, false);

            // Deselect the old slot.
            if(m_SelectedSlot)
                m_SelectedSlot.SetScale(Vector3.one, 0.2f);

            // And select the new one.
            m_SelectedSlot = newSlot;
            m_SelectedSlot.SetScale(Vector3.one * m_SelectedSlotScale, 0.1f);

            m_Frame.enabled = true;
            var frameRT = m_Frame.GetComponent<RectTransform>();
            frameRT.SetParent(m_SelectedSlot.transform);
            frameRT.localPosition = Vector2.zero;
            frameRT.sizeDelta = m_SelectedSlot.GetComponent<RectTransform>().sizeDelta;
            frameRT.localScale = Vector3.one;
        }
    }
}

Answer 1

您可以使用Transform.SetSiblingIndex（index）;

https://docs.unity3d.com/ScriptReference/Transform.SetSiblingIndex.html