iPhone apps: Can I open an app from a link in a website?

I'm a newbie iPhone developer, writi开发者_运维技巧ng an app that will kind of be the "mobile version" of a website.

I'm wondering whether it's possible to launch my app from a link in a website. So, for example, someone goes into our site in the iPhone Safari, clicks a link, and our app launches.

Is that possible?

If so can I also "pass parameters" to the app i'm launching? As in...

Clicking different links would allow them to get different stuff in the app at launch time.

Thanks!

Daniel

Certain apps have URL schemes that will launch them. If an app has published this scheme (or if you dig around in their bundle) you can launch it. For example, a hypothetical twitter app might launch with a twitterapp://here+is+my+tweet URL. If you preload your app with the correct URL scheme, you can do this for yours, too.

Here's a sample URL scheme from the info.plist:

<key>CFBundleURLTypes</key>
<array>
    <dict>
        <key>CFBundleURLName</key>
        <string>com.standalone.cooltwitterapp</string>
        <key>CFBundleURLSchemes</key>
        <array>
            <string>twitterapp</string>
        </array>
    </dict>
</array>

Also worth noting is that the application:openURL:sourceApplication:annotation: method will be called when your app launches from a URL. Details at Apple's Docs.

Yes you can, using custom URI schemes. Do note, however, that clients without the app will not be able to use the links.

If so can I also "pass parameters" to the app i'm launching?

Again, yes. Once your app has registered for a given scheme it's all yours.