I have a Facebook application that has a picture gallery. It's build in Flex 4. I want to allow users to link to a specific image.
How can that be done?
The only way I see this being done is adding a GET var like &my_picture=asd.jpg in the Facebook page URL, but I don't know how to read that from the iFrame.
Yes, you can add a parameter to the querystring for this:
http://app.facebook.com/yourapp?myparam=1234
Then, your app will be called like this:
http://domainwhereyouhostyourapp.com/your_fb_app/index.php?myparam=1234
Some other parameters are passed by facebook as well, most related to auth tokens, etc. They are prefixed by "fb_" to prevent name clashes.
In your index.php (or whatever you are using), read the get parameter you're interested in and pass them to your swf as usual.
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