Hi I have a question what is the best method as a beginner to save and load data for IPhone. What is the best method to understand for all beginner developer to Save and load Data for IPhone?

http://techority.com/2011/04/02/how-to-save-and-load-data-in-your-app/

I did that sample from the link you gave me and I was messing around with it and got this error

attempt to perform arithmetic on field 'twolock' (a nil value)

how do I fix this error

I use ice library for saving/loading data. It's been great for me:

http://developer.anscamobile.com/code/ice

Naomi

Hey guys,

Seconding the recommendation for Ice - the tutorial darkconsoles linked to is older and more abotu experimenting; it uses globals which you want to avoid.

Ice all the way!

Peach :)

How secure is ice against amateur plain text cheating? (root access - iFile on a jailbroken phone)

I personally just use JSON.
I have all my app settings in a lua table and just need to call json.encode to convert the table into a savable string, and then use json.decode to convert in back to a table again.

...and with regards to preventing hackers on jailbroken phones... I don't bother anymore.
I did bother before, but no matter how much effort you put in to trying to prevent it, there will always be somebody who figures out how to break it.

I leapt on this as a useful topic, as I have a large table to save.
However, with 40,000 items and 7 columns, the JSON equivalent is an incredibly wasteful file format.
I think I need something binary.. anything ready rubbed?

Sounds like a job for a SQLite database.

Maybe even Ice is something to think about. I haven't used it myself, however I think it also uses an SQLite database behind the scenes.

Thanks ingemar.
I think at my stage of development, a SQL Lite db is overkill. Even Ice seems OTT for the job.
I've elected to go for (n) rows of space delimited data.
The only caveat is that where I need an empty string, I will need to have a placeholder item.

so the test code I use to prove this was:

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testtab = {}--create dummy table
teststr = "jeff 10 5 x y 7"--original string
--read in the values
for word in teststr:gmatch("%w+") do
    print (word)
end