我怎样才能在unity中使用脚本创建一个新层

Question

我需要一个函数，该函数遍历所有现有的层名称，并查找我的层是否存在，如果不存在，则代码需要将给定的层添加到层列表

我试过这个代码这个团结论坛

void CreateLayer()
{
SerializedObject tagManager = new SerializedObject(AssetDatabase.LoadAllAssetsAtPath("ProjectSettings/TagManager.asset")[0]);
SerializedProperty layers = tagManager.FindProperty("layers");
if (layers == null || !layers.isArray)
{
Debug.LogWarning("Can't set up the layers.  It's possible the format of the layers and tags data has changed in this version of Unity.");
Debug.LogWarning("Layers is null: " + (layers == null));
return;
}
for (int i = 8; i < 31; i++)
{
SerializedProperty layerSP = layers.GetArrayElementAtIndex(i);
if (layerSP.stringValue == "MyLayer")
{
return;
}
}
for (int i = 8; i < 31; i++)
{
SerializedProperty layerSP = layers.GetArrayElementAtIndex(i);
if (layerSP.stringValue != "")
{
layerSP.stringValue = "MyLayer";
break;
}
}
tagManager.ApplyModifiedProperties();
}

但它对我不起作用

顺便说一下，我使用的是unity 5.6.3

如果有人知道答案，请分享

Answer 1

我在这里发现了这个答案，这个答案只在编辑器中有效，在构建中无效

创建一个新的c#脚本，将此代码添加到中

using UnityEngine;
using System.Collections;
public class Layers
{
private static int maxTags = 10000;
private static int maxLayers = 31;
/////////////////////////////////////////////////////////////////////
public void AddNewLayer(string name)
{
CreateLayer(name);
}
public void DeleteLayer(string name)
{
RemoveLayer(name);
}

////////////////////////////////////////////////////////////////////

/// <summary>
/// Adds the layer.
/// </summary>
/// <returns><c>true</c>, if layer was added, <c>false</c> otherwise.</returns>
/// <param name="layerName">Layer name.</param>
public static bool CreateLayer(string layerName)
{
// Open tag manager
SerializedObject tagManager = new SerializedObject(AssetDatabase.LoadAllAssetsAtPath("ProjectSettings/TagManager.asset")[0]);
// Layers Property
SerializedProperty layersProp = tagManager.FindProperty("layers");
if (!PropertyExists(layersProp, 0, maxLayers, layerName))
{
SerializedProperty sp;
// Start at layer 9th index -> 8 (zero based) => first 8 reserved for unity / greyed out
for (int i = 8, j = maxLayers; i < j; i++)
{
sp = layersProp.GetArrayElementAtIndex(i);
if (sp.stringValue == "")
{
// Assign string value to layer
sp.stringValue = layerName;
Debug.Log("Layer: " + layerName + " has been added");
// Save settings
tagManager.ApplyModifiedProperties();
return true;
}
if (i == j)
Debug.Log("All allowed layers have been filled");
}
}
else
{
//Debug.Log ("Layer: " + layerName + " already exists");
}
return false;
}
public static string NewLayer(string name)
{
if (name != null || name != "")
{
CreateLayer(name);
}
return name;
}
/// <summary>
/// Removes the layer.
/// </summary>
/// <returns><c>true</c>, if layer was removed, <c>false</c> otherwise.</returns>
/// <param name="layerName">Layer name.</param>
public static bool RemoveLayer(string layerName)
{
// Open tag manager
SerializedObject tagManager = new SerializedObject(AssetDatabase.LoadAllAssetsAtPath("ProjectSettings/TagManager.asset")[0]);
// Tags Property
SerializedProperty layersProp = tagManager.FindProperty("layers");
if (PropertyExists(layersProp, 0, layersProp.arraySize, layerName))
{
SerializedProperty sp;
for (int i = 0, j = layersProp.arraySize; i < j; i++)
{
sp = layersProp.GetArrayElementAtIndex(i);
if (sp.stringValue == layerName)
{
sp.stringValue = "";
Debug.Log("Layer: " + layerName + " has been removed");
// Save settings
tagManager.ApplyModifiedProperties();
return true;
}
}
}
return false;
}
/// <summary>
/// Checks to see if layer exists.
/// </summary>
/// <returns><c>true</c>, if layer exists, <c>false</c> otherwise.</returns>
/// <param name="layerName">Layer name.</param>
public static bool LayerExists(string layerName)
{
// Open tag manager
SerializedObject tagManager = new SerializedObject(AssetDatabase.LoadAllAssetsAtPath("ProjectSettings/TagManager.asset")[0]);
// Layers Property
SerializedProperty layersProp = tagManager.FindProperty("layers");
return PropertyExists(layersProp, 0, maxLayers, layerName);
}
/// <summary>
/// Checks if the value exists in the property.
/// </summary>
/// <returns><c>true</c>, if exists was propertyed, <c>false</c> otherwise.</returns>
/// <param name="property">Property.</param>
/// <param name="start">Start.</param>
/// <param name="end">End.</param>
/// <param name="value">Value.</param>
private static bool PropertyExists(SerializedProperty property, int start, int end, string value)
{
for (int i = start; i < end; i++)
{
SerializedProperty t = property.GetArrayElementAtIndex(i);
if (t.stringValue.Equals(value))
{
return true;
}
}
return false;
}
}

并创建层

new Layers().AddNewLayer("PP");