I'm not 100% sure on this - but a friend had a game where he stored some kind of data that could be emailed and then opening the email, the attachment could be viewed in his game. I suspect you'd need a plugin (especially as this is probably iOS specific) to perform the system registration.
@Scouser - any chance you could ask Damon how he did this?
WhiteTree Games - Home, home on the web, where the bits and bytes they do play! #MakeABetterGame! "Never give up, Never NEVER give up!" - Winston Churchill
What you need is to setup a custom URL scheme under iOS. It's pretty easy to do in Objective-C. Then pass the data back to the Gideros lua code (which can be done by directing injecting it into a Lua variable, or as simple as saving it as a file in Obj-C then reading back using Lua. Admittedly, the 2nd option is a kludge, but the degree of difficulty if you're not handy with Obj-c will be more attractive then option 1.)
You should also check: http://handleopenurl.com/ to make sure that there isn't a namespace collision with an already existing URL scheme by another app.
To register a URL Scheme, you need to open .plist file in Xcode and create an array key called URL types with a single array sub-item called URL Schemes. Here is a screenshot: https://developers.facebook.com/attachment/iosappid2.png
To publish your game, the final step is export as Xcode project+build+send to app store. After exporting as Xcode project, you can do any modification as you want.
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https://sites.google.com/site/xraystudiogame
@Scouser - any chance you could ask Damon how he did this?
#MakeABetterGame! "Never give up, Never NEVER give up!" - Winston Churchill
Here's a URL to get you started:
http://www.raywenderlich.com/1980/how-to-import-and-export-app-data-via-email-in-your-ios-app
You should also check:
http://handleopenurl.com/
to make sure that there isn't a namespace collision with an already existing URL scheme by another app.
Hope this helps,
- Ian