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List of iPhone URL Schemes

If you want to implement some cross-application connection in iOS, by making use of the following code snipped:

[[ UIApplication sharedApplication] openURL: url];

Now, as for the URL bit, there is a really good repository of iPhone URL's that can be found by going to:

Examples include Facebook, iTunes, SMS, Maps etc.

Facebook

This information comes from the iPhoneDevTools website.
NSURL *url = [NSURL URLWithString:@"fb://<insert function here>"];
[[UIApplication sharedApplication] openURL:url];
You can use these options:
    • fb://profile – Open Facebook app to the user’s profile
    • fb://friends – Open Facebook app to the friends list
    • fb://notifications – Open Facebook app to the notifications list (NOTE: there appears to be a bug with this URL. The Notifications page opens. However, it’s not possible to navigate to anywhere else in the Facebook app)
    • fb://feed – Open Facebook app to the News Feed
    • fb://events – Open Facebook app to the Events page
    • fb://requests – Open Facebook app to the Requests list
    • fb://notes- Open Facebook app to the Notes page
    • fb://albums – - Open Facebook app to Photo Albums list