Question

我需要有关如何修复拖动对象的帮助。当我向右移动相机（也带有图像/精灵对象）并拖动对象时，它会出现在先前的位置。如果我将“渲染模式”更改为“屏幕空间-叠加”，则它只能在图像上显示，而不能用于精灵。当我移动相机图像时，对象会随相机（我想要的）一起移动，但是精灵并不代表我将渲染模式更改为屏幕空间的原因-相机。我需要移动带有精灵对象的相机，并能够拖动该对象。

可拖动对象具有以下代码：

using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;

public class Dragable : MonoBehaviour, IBeginDragHandler, IDragHandler, IEndDragHandler {

public Transform parentToReturnTo = null;
public enum Slot { TYPE1, TYPE2 };
public Slot typeOfItem = Slot.INVENTORY;
GameObject placeholder = null;
Animator animDrop;

void Start()
{
    animDrop = GetComponentInChildren<Animator>();
}

public void OnBeginDrag(PointerEventData eventData)
{
    Debug.Log("OnBeginDrag");
    placeholder = new GameObject();
    placeholder.transform.SetParent(this.transform.parent);
    LayoutElement le = placeholder.AddComponent<LayoutElement>();
    le.preferredWidth = this.GetComponent<LayoutElement>().preferredWidth;
    le.preferredHeight = this.GetComponent<LayoutElement>().preferredHeight;
    le.flexibleWidth = 0;
    le.flexibleHeight = 0;
    placeholder.transform.SetSiblingIndex(this.transform.GetSiblingIndex() );
    parentToReturnTo = this.transform.parent;
    this.transform.SetParent(this.transform.parent.parent);
    GetComponent<CanvasGroup>().blocksRaycasts = false;
}
public void OnDrag(PointerEventData eventData)
{
    this.transform.position = eventData.position;
}
public void OnEndDrag(PointerEventData eventData)
{
    Debug.Log("OnEndDrag");
    this.transform.SetParent(parentToReturnTo);
    this.transform.SetSiblingIndex(placeholder.transform.GetSiblingIndex());
    GetComponent<CanvasGroup>().blocksRaycasts = true;
    Destroy(placeholder);
    animDrop.SetBool("OnDropAnimation", true);
}
}

要移动相机，我需要执行以下脚本

using UnityEngine;
using UnityEngine.EventSystems;

public class TouchController : MonoBehaviour
{
float touchStart = 0f;
Vector3 cameraDestination;
public float cameraSpeed = 0.1f;
public float maxPosX = 2900f;
public float minPosX = -2900f;
public bool DragUI = false;

public static bool IsPointerOverGameObject()
{
    if (EventSystem.current.IsPointerOverGameObject())
        return true;

    if (Input.touchCount > 0 && Input.touches[0].phase == TouchPhase.Began)
    {
        if (EventSystem.current.IsPointerOverGameObject(Input.touches[0].fingerId))
            return true;
    }
    return false;
}
void Start()
{
    cameraDestination = Camera.main.transform.position;
}
void Update()
{
    if (IsPointerOverGameObject() && Input.GetMouseButtonDown(0))
    {
        DragUI = true;
    }
    if (Input.GetMouseButtonDown(0))
    {
        touchStart = Input.mousePosition.x;
    }
    if (Input.GetMouseButtonUp(0))
    {
        float delta = Input.mousePosition.x - touchStart;
        if (delta < -50f && !DragUI)
        {
            if (cameraDestination.x < maxPosX)
            {
                cameraDestination = new Vector3(Camera.main.transform.position.x + 1600,
                Camera.main.transform.position.y, Camera.main.transform.position.z);
            }
        }
        else if (delta > 50f && !DragUI)
        {
            if (cameraDestination.x > minPosX)
            {
                cameraDestination = new Vector3(Camera.main.transform.position.x - 1600,
                Camera.main.transform.position.y, Camera.main.transform.position.z);
                Debug.Log(cameraDestination.x + " cam dest x left");
            }
        }
        else { DragUI = false;}
    }
    if (Vector3.Distance(Camera.main.transform.position, cameraDestination) > 0.1f && !DragUI)
    {
        if (Camera.main.transform.position.x > cameraDestination.x)
        {
            Camera.main.transform.position = new Vector3(Camera.main.transform.position.x - cameraSpeed,
                Camera.main.transform.position.y, Camera.main.transform.position.z);
            DragUI = false;
        }
        else
        {
            Camera.main.transform.position = new Vector3(Camera.main.transform.position.x + cameraSpeed,
                Camera.main.transform.position.y, Camera.main.transform.position.z);
            DragUI = false;
        }
    }
}
}

Answer 1

精灵是在世界空间中“存在”的对象，因此您需要更改画布以在世界空间中操作以混合图像和精灵。但是看来您的方法并不是解决问题的最佳方法，因为从您的描述中看起来有点奇怪。

Unity-相机移动后拖动对象

1 个答案: