麦田物语学习笔记:制作[SceneName]Attribute特性

基本流程

        因为在现有的项目中,像开始场景的切换或者Telepot组件都需要手动输入场景名,有时还可能键入出错,而该特性能用选择的方式去解决这一问题

1.代码实现

SceneNameDrawer.cs

//参数绘制
using UnityEditor;
using UnityEngine;
#if UNITY_EDITOR
[CustomPropertyDrawer(typeof(SceneNameAttribute))]
public class SceneNameDrawer : PropertyDrawer
{
    int sceneIndex = -1;//代表没有任何场景
    GUIContent[] sceneNames;

    readonly string[] scenePathSplit = { "/", ".unity" };
    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)//(position)长宽高;(property)需要绘制的property
    {
        if (EditorBuildSettings.scenes.Length == 0) return;

        if (sceneIndex == -1)
            GetSceneNameArray(property);

        int oldIndex = sceneIndex;

        sceneIndex = EditorGUI.Popup(position, label, sceneIndex, sceneNames);//Popup弹出式窗口

        if (oldIndex != sceneIndex)
            property.stringValue = sceneNames[sceneIndex].text;
    }

    private void GetSceneNameArray(SerializedProperty property)
    {
        var scenes = EditorBuildSettings.scenes;
        //初始化数组
        sceneNames = new GUIContent[scenes.Length];

        for (int i = 0; i < sceneNames.Length; i++)
        {
            string path = scenes[i].path;
            string[] splitPath = path.Split(scenePathSplit, System.StringSplitOptions.RemoveEmptyEntries);

            string sceneName = "";

            if (splitPath.Length > 0)
            {
                sceneName = splitPath[splitPath.Length - 1];
            }
            else
            {
                sceneName = "(Deleted Scene)";
            }
            sceneNames[i] = new GUIContent(sceneName);
        }

        if (sceneNames.Length == 0)
        {
            sceneNames = new[] { new GUIContent("Check Your Build Settings") };
        }

        if (!string.IsNullOrEmpty(property.stringValue))
        {
            bool nameFound = false;

            for (int i = 0; i < sceneNames.Length; i++)
            {
                if (sceneNames[i].text == property.stringValue)
                {
                    sceneIndex = i;
                    nameFound = true;
                    break;
                }
            }
            if (nameFound == false)
                sceneIndex = 0;
        }
        else
        {
            sceneIndex = 0;
        }

        property.stringValue = sceneNames[sceneIndex].text;
    }
}
#endif

 SceneNameAttribute.cs

public class SceneNameAttribute : PropertyAttribute
{ }

 然后在需要的脚本中增加[SceneName]就能实现效果了

最终效果

原文地址：https://blog.csdn.net/2301_77491688/article/details/145270890

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