1.简单托动代码，必须要第一个摄像机深度值比较高照射要拖动的物体，使其实时在物体前面，代码如下
using UnityEngine; using UnityEngine.Events; using UnityEngine.EventSystems; using System.Collections.Generic; using DG.Tweening; public class CarDrag : MonoBehaviour , IBeginDragHandler, IDragHandler, IEndDragHandler ,IPointerDownHandler ,IPointerUpHandler { private float offset; private Vector3 m_distance; private Vector3 m_origin; private UnityAction m_action; private Vector3 m_orignScale; private bool m_isCanClick; public GameObject m_effect; public void OnInitial(UnityAction m_action) { this.m_action = m_action; } private void Awake() { m_isCanClick = true; m_orignScale = transform.localScale; } public void OnPointerDown(PointerEventData eventData) { transform.DOScale(m_orignScale * 1.2f,0.2f); } public void OnPointerUp(PointerEventData eventData) { transform.DOScale(m_orignScale, 0.2F); } public void OnBeginDrag(PointerEventData eventData) { if (!m_isCanClick) return; transform.localScale = m_orignScale * 1.2f; transform.SetChildrenLayer(transform,LayerMask.NameToLayer("DefaultAdd")); offset = Camera.main.WorldToScreenPoint(transform.position).z; m_distance = -Camera.main.ScreenToWorldPoint(new Vector3(eventData.position.x, eventData.position.y, offset)) + transform.position; } public void OnDrag(PointerEventData eventData) { if (!m_isCanClick) return; transform.position = Camera.main.ScreenToWorldPoint(new Vector3(eventData.position.x, eventData.position.y, offset)) + m_distance; } public void OnEndDrag(PointerEventData eventData) { if (!m_isCanClick) return; List<RaycastResult> m_rayArray = new List<RaycastResult>(); EventSystem.current.RaycastAll(eventData, m_rayArray); //var o = m_rayArray.Find(x => x.gameObject.GetComponent<MeshRenderer>().enabled == false); foreach(var s in m_rayArray) { //Debug.LogError(s.gameObject.name + " "+ s.gameObject.tag); } var o = m_rayArray.Find(x => x.gameObject.tag == "road"); if (o.gameObject != null) { if (GetComponent<NumTags>().m_tagNum == o.gameObject.GetComponent<NumTags>().m_tagNum) { transform.DOMove(o.gameObject.transform.position, 0.4F).OnComplete( () => { m_effect.SetActive(true); m_action.Invoke(); GetComponent<Animator>().enabled = true; transform.SetChildrenLayer(transform, LayerMask.NameToLayer("Default")); }); GetComponent<SphereCollider>().enabled = false; } else { m_isCanClick = false; transform.DOLocalMove(Vector3.zero, 0.8f).OnComplete(() => { transform.SetChildrenLayer(transform, LayerMask.NameToLayer("Default")); m_isCanClick = true; }); } } else { m_isCanClick = false; transform.DOLocalMove(Vector3.zero, 0.8f).OnComplete(() => { transform.SetChildrenLayer(transform, LayerMask.NameToLayer("Default")); m_isCanClick = true; }); } transform.DOScale(m_orignScale, 0.4f); } }2.设置层为XX层里面的扩展类：
using UnityEngine; using System.Collections.Generic; using System; public static class TransformExtension { public static int GetActiveChildCount(this Transform transform) { int count = 0; foreach (Transform child in transform) { if (child.gameObject.activeSelf) count++; } return count; } public static T[] GetComponentsInFirstHierarchyChildren<T>(this Transform transform, bool includeInactive = true) where T : Component { List<T> components = new List<T>(); foreach (Transform child in transform) { if (!includeInactive && !child.gameObject.activeSelf) continue; T component = child.GetComponent<T>(); if (component != null) components.Add(component); } return components.ToArray(); } public static void SetX(this Transform transform, float x) { Vector3 newPosition = new Vector3(x, transform.position.y, transform.position.z); transform.position = newPosition; } public static void SetY(this Transform transform, float y) { Vector3 newPosition = new Vector3(transform.position.x, y, transform.position.z); transform.position = newPosition; } public static void SetZ(this Transform transform, float z) { Vector3 newPosition = new Vector3(transform.position.x, transform.position.y, z); transform.position = newPosition; } public static void SetXY(this Transform transform, Vector3 position) { transform.position = new Vector3(position.x, position.y, transform.position.z); } public static void SetXZ(this Transform transform, Vector3 position) { transform.position = new Vector3(position.x, transform.position.y, position.z); } public static void SetLocalX(this Transform transform, float x) { Vector3 newPosition = new Vector3(x, transform.localPosition.y, transform.localPosition.z); transform.localPosition = newPosition; } public static void SetLocalY(this Transform transform, float y) { Vector3 newPosition = new Vector3(transform.localPosition.x, y, transform.localPosition.z); transform.localPosition = newPosition; } public static void SetLocalZ(this Transform transform, float z) { Vector3 newPosition = new Vector3(transform.localPosition.x, transform.localPosition.y, z); transform.localPosition = newPosition; } public static void SetLocalAngleX(this Transform transform, float x) { transform.localEulerAngles = new Vector3(x, transform.localEulerAngles.y, transform.localEulerAngles.z); } public static void SetLocalAngleY(this Transform transform, float y) { transform.localEulerAngles = new Vector3(transform.localEulerAngles.x, y, transform.localEulerAngles.z); } public static void SetLocalAngleZ(this Transform transform, float z) { transform.localEulerAngles = new Vector3(transform.localEulerAngles.x, transform.localEulerAngles.y, z); } public static string GetPath(this Transform transform) { string path = transform.name; while (transform.parent != null) { transform = transform.parent; path = transform.name + "/" + path; } return path; } public static int IndexInParent(this Transform transform) { if (transform.parent == null) return -1; for (int i = 0; i < transform.parent.childCount; i++) { if (transform.parent.GetChild(i) == transform) return i; } return -1; } public static void SetActiveInChildren(this Transform transform, bool value) { for (int i = 0; i < transform.childCount; i++) { transform.GetChild(i).gameObject.SetActive(value); } } public static void SetLocalScaleX(this Transform transform, float x) { Vector3 newScale = new Vector3(x, transform.localScale.y, transform.localScale.z); transform.localScale = newScale; } public static void SetLocalScaleY(this Transform transform, float y) { Vector3 newScale = new Vector3(transform.localScale.x, y, transform.localScale.z); transform.localScale = newScale; } public static void SetLocalScaleZ(this Transform transform, float z) { Vector3 newScale = new Vector3(transform.localScale.x, transform.localScale.y, z); transform.localScale = newScale; } public static bool EqualsInHierarchy(this Transform transform, Transform other) { if (transform.childCount != other.childCount) return false; for (int i = 0; i < transform.childCount; i++) { if (transform.GetChild(i).name != other.GetChild(i).name) return false; else if (!EqualsInHierarchy(transform.GetChild(i), other.GetChild(i))) return false; } return true; } public static void DestroyChildren(this Transform transform) { for (int i = 0; i < transform.childCount; i++) UnityEngine.Object.Destroy(transform.GetChild(i).gameObject); } public static T GetComponentInChildrenWithName<T>(this Transform transform, string name) where T : Component { var array = transform.GetComponentsInChildren<T>(); return Array.Find(array, (item) => { return item.name == name; }); } public static void SetChildrenLayer(this Transform transform, Transform transforms, LayerMask layer) { foreach (Transform childTransform in transform) { childTransform.gameObject.layer = layer; childTransform.SetChildrenLayer(childTransform, layer); } } }