feat(init): 搭建初始的项目框架

Assets/Script/Core/ScenesManager.cs

@@ -0,0 +1,84 @@
+using UnityEngine;
+using UnityEngine.SceneManagement;
+using System.Collections;
+
+namespace Core
+{
+    public class ScenesManager : MonoSingleton<ScenesManager>
+    {
+        public static ScenesManager Instance { get; private set; }
+
+        private string currentGameplayScene;
+
+        private bool IsLoadGameplayUI = false;
+
+        void Awake()
+        {
+            if (Instance != null)
+            {
+                Destroy(gameObject);
+                return;
+            }
+            Instance = this;
+            //DontDestroyOnLoad(gameObject);
+        }
+
+        public void LoadMainMenu()
+        {
+            if (IsLoadGameplayUI)
+            {
+                // 如果已经加载过游戏内UI场景，则卸载掉
+                StartCoroutine(UnloadScene("UIScene"));
+                IsLoadGameplayUI = false;
+            }
+            // 加载主菜单场景，需要卸载掉除了Core以外的所有场景
+            StartCoroutine(SwitchGameplay("StartMenu"));
+        }
+
+
+        public void LoadGameplay(string sceneName)
+        {
+            StartCoroutine(SwitchGameplay(sceneName));
+            if (!IsLoadGameplayUI)
+            {
+                // 只加载一次游戏内UI场景
+                StartCoroutine(LoadSceneAdditive("UIScene"));
+                IsLoadGameplayUI = true;
+            }
+        }
+
+        /// <summary>
+        /// 切换游戏场景，卸载当前的游戏场景，加载新的游戏场景
+        /// 适用于在游戏内切换场景
+        /// </summary>
+        /// <param name="newScene"></param>
+        /// <returns></returns>
+        private IEnumerator SwitchGameplay(string newScene)
+        {
+            if (!string.IsNullOrEmpty(currentGameplayScene))
+            {
+                yield return UnloadScene(currentGameplayScene);
+            }
+            yield return LoadSceneAdditive(newScene);
+            currentGameplayScene = newScene;
+        }
+
+        private IEnumerator LoadSceneAdditive(string sceneName)
+        {
+            var async = UnityEngine.SceneManagement.SceneManager.LoadSceneAsync(sceneName, LoadSceneMode.Additive);
+            while (!async.isDone)
+            {
+                yield return null;
+            }
+        }
+
+        private IEnumerator UnloadScene(string sceneName)
+        {
+            var async = UnityEngine.SceneManagement.SceneManager.UnloadSceneAsync(sceneName);
+            while (!async.isDone)
+            {
+                yield return null;
+            }
+        }
+    }
+}