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value updates only when i restart the game | dataSaver — Gideros Forum
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    value updates only when i restart the game | dataSaver

    definistodefinisto Member
    in General questions
    Recently I made a game with "easy", "normal", "hard" modes. You can choose any mode on the menu.lua page(which is first scene loading in main.lua). When you end the game for example in "easy" mode, this happens:
    1) in game.lua "onExitBegin" listener
    easyVal = math.max(easyVal, times)
DataSaver:saveValue("easy", easyVal)
    Note: easyVal is global value declared in menu.lua via
    easyVal = dataSave:loadValue("easy")
    2) then go the the menu page in menu.lua easyVal is declared in Menu:init() and again here it is printed

    Thus highscore was updated, the score doesn't change after exiting game.lua and updating easyVal. Can you please point me to a solution?
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    Comments

    • MoKaLuxMoKaLux Member
      edited March 2022 Accepted Answer
      This is my setup:
      - the data save class (I put it in its own file, those are declared as global)
      require "json"
 
function saveData(filepath, value)
	local contents = json.encode(value)
	local file = io.open(filepath, "w") -- create file
	file:write(contents) -- save json string in file
	io.close(file)
end
 
function getData(filepath)
	local value
	local file = io.open(filepath, "r")
	if file then
		local contents = file:read("*a") -- read contents
		value = json.decode(contents) -- decode json
		io.close(file)
	end
 
	return value
end
      - then in init I declare my global variables
      g_configfilepath = "|D|myprefs.txt"
g_language = application:getLanguage()
g_omodelpath = nil
...
      - then before the game starts I try to read the data (I put it in main.lua before scene manager)
      function myLoadPrefs(xconfigfilepath)
	local mydata = getData(xconfigfilepath) -- try to read information from file
	if not mydata then -- if no prefs file, create it
		mydata = {}
		mydata.g_language = g_language
		mydata.g_omodelpath = g_omodelpath
...
		saveData(g_configfilepath, mydata) -- create file and save datas
	else -- prefs file exists, use it!
		g_language = mydata.g_language
		g_omodelpath = mydata.g_omodelpath
...
	end
end
      - then I load the data by calling the function myLoadPrefs
      -- let's load
myLoadPrefs(g_configfilepath) -- load prefs
      - then there is the scene manager (also in main.lua)
      scenemanager = SceneManager.new(
	{
		["menu"] = Menu,
		["thestage"] = TheStage,
	}
)
scenemanager:changeScene("menu")
stage:addChild(scenemanager)
      - then anywhere in the game (game, menu, ...) I can save the new data with this line
      		mySavePrefs(g_configfilepath)
      - and the mySavePrefs function (please note it is a global function, I put it just under the myLoadPrefs function in main.lua
      function mySavePrefs(xconfigfilepath)
	local mydata = {} -- clear the table
	mydata.g_language = g_language
	mydata.g_omodelpath = g_omodelpath
...
	saveData(xconfigfilepath, mydata) -- save new data
end
      Ouf! :) hope this helps!?

      See also https://wiki.gideros.rocks/index.php/Start_Here#Save.2Fread_data_persistently

      Likes: definisto

      my growING GIDEROS github repositories: https://github.com/mokalux?tab=repositories
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    • definistodefinisto Member
      MoKaLux said:

      This is my setup:
      - the data save class (I put it in its own file, those are declared as global)

      require "json"
 
function saveData(filepath, value)
	local contents = json.encode(value)
	local file = io.open(filepath, "w") -- create file
	file:write(contents) -- save json string in file
	io.close(file)
end
 
function getData(filepath)
	local value
	local file = io.open(filepath, "r")
	if file then
		local contents = file:read("*a") -- read contents
		value = json.decode(contents) -- decode json
		io.close(file)
	end
 
	return value
end
      - then in init I declare my global variables
      g_configfilepath = "|D|myprefs.txt"
g_language = application:getLanguage()
g_omodelpath = nil
...
      - then before the game starts I try to read the data (I put it in main.lua before scene manager)
      function myLoadPrefs(xconfigfilepath)
	local mydata = getData(xconfigfilepath) -- try to read information from file
	if not mydata then -- if no prefs file, create it
		mydata = {}
		mydata.g_language = g_language
		mydata.g_omodelpath = g_omodelpath
...
		saveData(g_configfilepath, mydata) -- create file and save datas
	else -- prefs file exists, use it!
		g_language = mydata.g_language
		g_omodelpath = mydata.g_omodelpath
...
	end
end
      - then I load the data by calling the function myLoadPrefs
      -- let's load
myLoadPrefs(g_configfilepath) -- load prefs
      - then there is the scene manager (also in main.lua)
      scenemanager = SceneManager.new(
	{
		["menu"] = Menu,
		["thestage"] = TheStage,
	}
)
scenemanager:changeScene("menu")
stage:addChild(scenemanager)
      - then anywhere in the game (game, menu, ...) I can save the new data with this line
      		mySavePrefs(g_configfilepath)
      - and the mySavePrefs function (please note it is a global function, I put it just under the myLoadPrefs function in main.lua
      function mySavePrefs(xconfigfilepath)
	local mydata = {} -- clear the table
	mydata.g_language = g_language
	mydata.g_omodelpath = g_omodelpath
...
	saveData(xconfigfilepath, mydata) -- save new data
end
      Ouf! :) hope this helps!?

      See also
      Thnx for useful info :) I decided the problem. It wasn't in the datasave functions. I just set timer 24 milleseconds after scene comes to update textfield values with saved data and it has worked!

      Likes: MoKaLux

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