修复持久化存档复制文件bug

src/level/LevelsManager.gd

@@ -105,8 +105,10 @@ func save_persistent(index:int)->void:
 	var dest_dir = "user://%s/" % index
 	dir.make_dir(dest_dir)
 	file.open(dest_dir + "level.data",File.WRITE)
-	file.store_32(self.level)
-	file.store_var(self.global,true)
+	file.store_string(to_json({
+		"level":self.level,
+		"global":self.global
+	}))
 	file.close()
 	#迁移数据到持久化目录
 	if dir.open(tmp_level_scene_path) == OK:
@@ -138,15 +140,17 @@ func load_persistent(index:int)->void:
 			if dir.current_is_dir():
 				print("Found directory: " + file_name)
 			else:
-				var copy_result = dir.copy(dest_dir + file_name,tmp_level_scene_path + file_name)
-				if copy_result != OK:
-					print("读取存档失败",copy_result)
+				if file_name != "level.data":
+					var copy_result = dir.copy(dest_dir + file_name,tmp_level_scene_path + file_name)
+					if copy_result != OK:
+						print("读取存档失败",copy_result)
 			file_name = dir.get_next()
 	else:
 		print("An error occurred when trying to access the path.")
 	#读取楼层
 	file.open(dest_dir + "level.data",File.READ)
-	var level = file.get_32()
-	self.global = file.get_var(true)
+	var data = JSON.parse(file.get_as_text()).result
+	var level = data.level
+	self.global = data.global
 	file.close()
 	load_data(level)