编辑模式下，控制对象移动

有时候我们可能会有这样的需求，就是在编辑模式下，控制移动场景中的物体，这里面有两个点要解决：

（1）怎么在编辑模式下运行一个脚本；

（2）怎么有效地响应鼠标按键。

第一个问题可以使用编辑器属性ExecuteInEditMode让脚本在编辑模式也能实时地更新。下面的代码用来控制物体的移动，并且可以在编辑模式下运行：

using UnityEngine;
using System.Collections;#if UNITY_EDITOR
using UnityEditor;
#endif[ExecuteInEditMode]
public class MoveComponent : MonoBehaviour
{private CharacterController controller;private float speed = 3f;private float rotateSpeed = 50f;public void Init(){controller = transform.GetComponent("CharacterController") as CharacterController;if (controller == null) Debug.Log("CharacterController not add!");}public void MoveForward(){if (controller == null) return;controller.Move(Time.fixedDeltaTime * transform.forward * speed);}public void MoveBack(){if (controller == null) return;controller.Move(-Time.fixedDeltaTime * transform.forward * speed);}public void TurnLeft(){if (controller == null) return;transform.Rotate(Vector3.up, -Time.fixedDeltaTime * rotateSpeed);}public void TurnRight(){if (controller == null) return;transform.Rotate(Vector3.up, Time.fixedDeltaTime * rotateSpeed);}}

第二个问题的解决方法是使用EditorWindow的OnGUI来响应KeyDown消息，下面的代码通过创建一个测试物体，并为其添加MoveComponent来让其移动：

using UnityEngine;
using UnityEditor;
using System.Collections;#if UNITY_EDITOR
using UnityEditor;
#endif
public class CameraHelperEditor : EditorWindow
{public static CameraHelperEditor window = null;[MenuItem("MyEditor/CameraHelperEditor")]public static void ShowWindow(){window = EditorWindow.GetWindow(typeof(CameraHelperEditor), false, "CameraHelperEditor") as CameraHelperEditor;}private const string Prefab = "Test/Cube";private GameObject player = null;private MoveComponent moveComp = null;void OnGUI(){if (GUILayout.Button("Init")){player = GameObject.Instantiate(Resources.Load(Prefab)) as GameObject;player.AddComponent("CharacterController");moveComp = player.AddComponent("MoveComponent") as MoveComponent;moveComp.Init();}switch (Event.current.type){case EventType.keyDown:{if (Event.current.keyCode == KeyCode.W){Debug.Log(Time.deltaTime);Debug.Log(Time.fixedDeltaTime);moveComp.MoveForward();}else if (Event.current.keyCode == KeyCode.S){moveComp.MoveBack();}else if (Event.current.keyCode == KeyCode.A){moveComp.TurnLeft();}else if (Event.current.keyCode == KeyCode.D){moveComp.TurnRight();}}break;}}void OnDestroy(){if(player != null){GameObject.DestroyImmediate(player);player = null;}moveComp = null;}}

可以看到按键消息的响应都是放在OnGUI里面处理的。

对于该问题的解决我相信还有更好的方法，希望伙伴们能够留言给予指点。