Hi…
I seem to have a problem with JSON -
i’m trying to save the highscores in my game with it…
I’m doing everything according to how it should be - and it work. In the simulator it saves the scores perfectly, even when I restart it, it still knows what the old scores were…
On the device however, the scores are refreshed every time I restart the app…
Is there something I’m missing?
Where are you saving the scores to? system.ResourcesDirectory or system.DocumentsDirectory? Do you by any chance have a difference in the filenames as far as case sensitivity is concerned?
I’m saving it to system.DocumentsDirectory.
and as far as the file name it’s exactly the same in all its references.
I also used the bit of code you published regarding saving with JSON, and it still didn’t work.
this is what I wrote in the main.lua when the game starts -
path= system.pathForFile(“LMData.json”, system.DocumentsDirectory)
file=io.open(path, “r”)
Data={}
this is what I wrote when I saved the scores-
if(isArcade) then
Data.lastscore_arcade= gameScore
local stringified=json.encode(Data)
file= io.open(path,“w”)
file:write(stringified)
io.close(file)
newHighScore=false
if(Data.highscore_arcade~=nil) then
if(Data.lastscore_arcade>Data.highscore_arcade) and (Data.lastscore_arcade>0) then
Data.highscore_arcade = Data.lastscore_arcade
local stringified=json.encode(Data)
file= io.open(path,“w”)
file:write(stringified)
io.close(file)
newHighScore=true
end
else
Data.highscore_arcade = Data.lastscore_arcade
if(Data.highscore_arcade>0) then
local stringified=json.encode(Data)
file= io.open(path,“w”)
file:write(stringified)
io.close(file)
newHighScore=true
else
Data.highscore_arcade=0
newHighScore=false
end
end
else
Data.lastscore_time= gameScore
local stringified=json.encode(Data)
file= io.open(path,“w”)
file:write(stringified)
io.close(file)
newHighScore=false
if(Data.highscore_time~=nil) then
if(Data.lastscore_time>Data.highscore_time) and (Data.lastscore_time>0) then
Data.highscore_time = Data.lastscore_time
local stringified=json.encode(Data)
file= io.open(path,“w”)
file:write(stringified)
io.close(file)
newHighScore=true
end
else
Data.highscore_time = Data.lastscore_time
if(Data.highscore_time>0) then
local stringified=json.encode(Data)
file= io.open(path,“w”)
file:write(stringified)
io.close(file)
newHighScore=true
else
Data.highscore_time=0
newHighScore=false
end
end
end
I tried both with the save/load functions you suggested in the article, and without them, but it made no difference
Where do you actually read the data? I only see you saving it and initializing an empty data table at the top.
Yea figured it out just now…
been using several methods which didnt work and gave me errors, but finally tried this one and it did the trick -
path= system.pathForFile(“LMData.json”, system.DocumentsDirectory)
local contents = “”
Data = {}
file = io.open( path, “r” )
if file then
local contents = file:read( “*a” )
Data = json.decode(contents);
io.close( file )
end
thank you 
Where are you saving the scores to? system.ResourcesDirectory or system.DocumentsDirectory? Do you by any chance have a difference in the filenames as far as case sensitivity is concerned?
I’m saving it to system.DocumentsDirectory.
and as far as the file name it’s exactly the same in all its references.
I also used the bit of code you published regarding saving with JSON, and it still didn’t work.
this is what I wrote in the main.lua when the game starts -
path= system.pathForFile(“LMData.json”, system.DocumentsDirectory)
file=io.open(path, “r”)
Data={}
this is what I wrote when I saved the scores-
if(isArcade) then
Data.lastscore_arcade= gameScore
local stringified=json.encode(Data)
file= io.open(path,“w”)
file:write(stringified)
io.close(file)
newHighScore=false
if(Data.highscore_arcade~=nil) then
if(Data.lastscore_arcade>Data.highscore_arcade) and (Data.lastscore_arcade>0) then
Data.highscore_arcade = Data.lastscore_arcade
local stringified=json.encode(Data)
file= io.open(path,“w”)
file:write(stringified)
io.close(file)
newHighScore=true
end
else
Data.highscore_arcade = Data.lastscore_arcade
if(Data.highscore_arcade>0) then
local stringified=json.encode(Data)
file= io.open(path,“w”)
file:write(stringified)
io.close(file)
newHighScore=true
else
Data.highscore_arcade=0
newHighScore=false
end
end
else
Data.lastscore_time= gameScore
local stringified=json.encode(Data)
file= io.open(path,“w”)
file:write(stringified)
io.close(file)
newHighScore=false
if(Data.highscore_time~=nil) then
if(Data.lastscore_time>Data.highscore_time) and (Data.lastscore_time>0) then
Data.highscore_time = Data.lastscore_time
local stringified=json.encode(Data)
file= io.open(path,“w”)
file:write(stringified)
io.close(file)
newHighScore=true
end
else
Data.highscore_time = Data.lastscore_time
if(Data.highscore_time>0) then
local stringified=json.encode(Data)
file= io.open(path,“w”)
file:write(stringified)
io.close(file)
newHighScore=true
else
Data.highscore_time=0
newHighScore=false
end
end
end
I tried both with the save/load functions you suggested in the article, and without them, but it made no difference
Where do you actually read the data? I only see you saving it and initializing an empty data table at the top.
Yea figured it out just now…
been using several methods which didnt work and gave me errors, but finally tried this one and it did the trick -
path= system.pathForFile(“LMData.json”, system.DocumentsDirectory)
local contents = “”
Data = {}
file = io.open( path, “r” )
if file then
local contents = file:read( “*a” )
Data = json.decode(contents);
io.close( file )
end
thank you