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PO
 

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    <p>One way could be to register a custom URL scheme for each of your apps. And you would ask the user to open the episode <code>n</code> which would link to episode <code>n+1</code> with your specific info in the URL.</p> <p>When the app <code>n+1</code> opens, you can treat the info from the URL. Make sure to put safeguards in against tempering the URLs (if that's important for your app).</p> <p>To do that, implement the following method in your application delegate:</p> <pre><code>- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url </code></pre> <p><a href="http://developer.apple.com/iPhone/library/documentation/UIKit/Reference/UIApplicationDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/UIApplicationDelegate/application:handleOpenURL:" rel="nofollow noreferrer">Apple Doc for <code>handleOpenURL:</code></a></p> <p>NB: In episode <code>n</code>, you could use the method <a href="http://developer.apple.com/iPhone/library/documentation/UIKit/Reference/UIApplication_Class/Reference/Reference.html#//apple_ref/occ/instm/UIApplication/canOpenURL:" rel="nofollow noreferrer"><code>canOpenURL:</code></a> to know if episode <code>n+1</code> is installed or not, thus behaving differently. Similarly, <code>n+1</code> could know if the user has <code>n</code> already and then ask if the user wants to get their info from <code>n</code> and open it for them… It's up to you at that point :)</p> <p>You can also look at</p> <pre><code>`- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions` </code></pre> <p>which seems to be newer and includes the treatment of the case of an app launched from a remote notification. (<a href="http://developer.apple.com/iPhone/library/documentation/UIKit/Reference/UIApplicationDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/UIApplicationDelegate/application:didFinishLaunchingWithOptions:" rel="nofollow noreferrer">Apple Doc for <code>didFinishLaunchingWithOptions:</code></a>)</p>
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    1. POTwo iPhone Apps sharing information
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    1. COAnd with `canOpenURL` and `openURL` you can even make it so that `n+1` detects that `n` is here, automatically launches `n`, which knows that it should send the data, thus calls `openURL` again to open `n+1` right away. It might be kind of distressing for the user to see the apps closing and opening, but you get my point.
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    2. COThis is the way I've considered doing it many times, if I ever got the chance to do something this interesting.
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      1. USEd Marty
 

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