Here is Peach Ellen's ego.lua file which reads&writes the files. However, i am not sure where to put my txt file in order to read and write on it. I put the file into project's file and also drag it into corona where the project is. However, it doesn't react to the changes.
module (..., package.seeall)
--Save function
function saveFile( fileName, fileData )
--Path for file
local path = system.pathForFile( fileName, system.DocumentsDirectory )
--Open the file
local file = io.open( path, "w+" )
--Save specified value to the file
if file then
file:write( fileData )
io.close( file )
end
end
--Load function
function loadFile( fileName )
--Path for file
local path = system.pathForFile( fileName, system.DocumentsDirectory )
--Open the file
local file = io.open( path, "r" )
--If the file exists return the data
if file then
local fileData = file:read( "*a" )
io.close( file )
return fileData
--If the file doesn't exist create it and write it with "empty"
else
file = io.open( path, "w" )
file:write( "empty" )
io.close( file )
return "empty"
end
end
And that's the main.lua file that uses ego.lua and try to keep record of highest score:
--Hide the status bar
display.setStatusBar(display.HiddenStatusBar)
--Saving/Loading Stuff
local ego = require "ego"
local saveFile = ego.saveFile
local loadFile = ego.loadFile
--------------------------------------------------------------------
--------------------------------------------------------------------
--Create the background and make it blue
local bg = display.newRect( 0, 0, 320, 480 )
bg:setFillColor( 150, 180, 200 )
--Start the score at 0
local score = 0
--Create score text and make it dark gray
local scoreText = display.newText(score, 200, 20, native.systemFont, 24)
scoreText:setTextColor( 80, 80, 80 )
--Function to add to score and update scoreText
local function addToScore()
score = score + 1
scoreText.text = score
end
bg:addEventListener("tap", addToScore)
--------------------------------------------------------------------
--------------------------------------------------------------------
--Load highscore value from file. (It will initally be a string.)
highscore = loadFile ("gameScores.txt")
--If the file is empty (this means it is the first time you've run the app) save it as 0
local function checkForFile ()
if highscore == "empty" then
highscore = 0
saveFile("gameScores.txt", highscore)
end
end
checkForFile()
--Print the current highscore
print ("Highscore is", highscore)
--------------------------------------------------------------------
--------------------------------------------------------------------
--When the app is quit (or simulator refreshed) save the new highscore
--(If score > highscore the data will not be changed)
local function onSystemEvent ()
if score > tonumber(highscore) then --We use tonumber as highscore is a string when loaded
saveFile("gameScores.txt", score)
end
end
Runtime:addEventListener( "system", onSystemEvent )
You can see that the Ego class stores all its files in system.DocumentsDirectory directory.
This directory can be accessed by File --> Show Project Sandbox --> Documents
You can change the directory to other directories if you want. The available Directories are