在给Unity的项目书写小工具的时候，我们常常会使用到Selection类来快速获取策划或美术所选择的物体，比如：获取当前选定的单个物体、多个物体或者Transform等等……
那么今天我们就来讨论下这个Selection类具体有哪些用法，已经还有多少黑科技隐藏在里面。
首先，我们来看看这个类里面都有哪些函数功能
#region 程序集 UnityEditor.dll, v0.0.0.0
// ……\Library\UnityAssemblies\UnityEditor.dll
#endregion
using System;
using UnityEngine;
namespace UnityEditor
{
// 摘要:
// Access to the selection in the editor.
public sealed class Selection
{
public Selection();
// 摘要:
// Returns the active game object. (The one shown in the inspector).
public static GameObject activeGameObject { get; set; }
//
// 摘要:
// Returns the instanceID of the actual object selection. Includes prefabs,
// non-modifyable objects.
public static int activeInstanceID { get; set; }
//
// 摘要:
// Returns the actual object selection. Includes prefabs, non-modifyable objects.
public static UnityEngine.Object activeObject { get; set; }
//
// 摘要:
// Returns the active transform. (The one shown in the inspector).
public static Transform activeTransform { get; set; }
//
// 摘要:
// Returns the guids of the selected assets.
public static string[] assetGUIDs { get; }
//
// 摘要:
// Returns the actual game object selection. Includes prefabs, non-modifyable
// objects.
public static GameObject[] gameObjects { get; }
//
// 摘要:
// The actual unfiltered selection from the Scene returned as instance ids instead
// of objects.
public static int[] instanceIDs { get; set; }
//
// 摘要:
// The actual unfiltered selection from the Scene.
public static UnityEngine.Object[] objects { get; set; }
//
// 摘要:
// Returns the top level selection, excluding prefabs.
public static Transform[] transforms { get; }
// 摘要:
// Returns whether an object is contained in the current selection.
public static bool Contains(int instanceID);
//
// 摘要:
// Returns whether an object is contained in the current selection.
public static bool Contains(UnityEngine.Object obj);
//
// 摘要:
// Returns the current selection filtered by type and mode.
public static UnityEngine.Object[] GetFiltered(Type type, SelectionMode mode);
//
// 摘要:
// Allows for fine grained control of the selection type using the SelectionMode
// bitmask.
public static Transform[] GetTransforms(SelectionMode mode);
}
}
下面我们来逐一讲解下：
1、构造函数
public Selection();
这个没啥好说的，跳过
2、属性
public static GameObject activeGameObject { get; set; } //返回Inspector中正显示的GameObject(Hierarchy、Project)
public static int activeInstanceID { get; set; } //返回当前物体的InstanceID(Hierarchy、Project)
public static UnityEngine.Object activeObject { get; set; } //返回选择的激活物体(Hierarchy、Project)
public static Transform activeTransform { get; set; } //返回选择的激活变换(Hierarchy)
public static string[] assetGUIDs { get; } //返回选择资源的GUID(Project)
public static GameObject[] gameObjects { get; } //返回选择的激活物体(Hierarchy、Project)
public static int[] instanceIDs { get; set; } //返回当前物体的InstanceID(Hierarchy、Project)
public static UnityEngine.Object[] objects { get; set; } //返回选择的激活物体(Hierarchy、Project)
public static Transform[] transforms { get; } //返回选择的激活变换(Hierarchy)
3、方法
public static bool Contains (int instanceID); //返回一个instabceID是否包含在当前选择中
public static bool Contains (UnityEngine.Object obj); //返回一个object是否包含在当前选择中
public static UnityEngine.Object[] GetFiltered (Type type, SelectionMode mode); //通过Type和SelectionMode的方式筛选物体
public static Transform[] GetTransforms (SelectionMode mode); //通过SelectionMode筛选物体
在上面的方法中使用到了SelectionMode(选择模式)，那这里就列举下这个枚举类的内部选项
#region 程序集 UnityEditor.dll, v0.0.0.0 // ……\Library\UnityAssemblies\UnityEditor.dll
#endregion
using System;
namespace UnityEditor
{
// 摘要:
// SelectionMode can be used to tweak the selection returned by Selection.GetTransforms.
public enum SelectionMode
{
Unfiltered = 0, //整个选择(不过滤)
TopLevel = 1, //返回最顶层的
Deep = 2, //返回选择和选择的子物体
ExcludePrefab = 4, //排除Prefab
OnlyUserModifiable = 8, //自有用户可更改的
Editable = 8, //可编辑的
Assets = 16, //资源
DeepAssets = 32, //资源和子目录
}
}
以上便是Selection类的全部方法和属性简介，在后面的博客中，我们会给出一些使用示例和更详细的方法讲解，敬请期待！！！