iOS 7 - Background Fetching (CocoaHeads Lyon octobre 2013)

Billet de blog associé : http://www.vtourraine.net/blog/ios-7-background-fetching

Transcript

1. Background Fetching
   CocoaHeads Lyon - octobre 2013
   Vincent Tourraine - shazino
   

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2. Pour quoi faire ?
   ➡ Télécharger des nouvelles données
   sans ouvrir l’application
   ➡ Exécution régulière en tâche de fond
   

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3. Mise en place
   

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4. Configuration du projet
   

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5. Info.plist
   UIBackgroundModes
   
   fetch
   
   

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6. Définir l’intervalle
   - (BOOL)application:(UIApplication *)application
   didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
   {
   [application setMinimumBackgroundFetchInterval:
   UIApplicationBackgroundFetchIntervalMinimum];
   // ...
   }
   

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7. Appel en tâche de fond
   - (void)application:(UIApplication *)application
   performFetchWithCompletionHandler:
   (void (^)(UIBackgroundFetchResult))completionHandler
   {
   [self.manager GET:@"http://example.com/resources.json"
   parameters:nil success:^(id operation, id responseObject) {
   completionHandler(UIBackgroundFetchResultNewData);
   } failure:^(id operation, NSError *error) {
   completionHandler(UIBackgroundFetchResultFailed);
   }];
   }
   

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8. Debug
   

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9. Configuration du scheme
   

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10. Plus d’infos
    • UIApplication Class Reference
    https://developer.apple.com/library/ios/documentation/uikit/reference/
    UIApplication_Class/Reference/Reference.html
    • UIApplicationDelegate Protocol Reference
    https://developer.apple.com/library/ios/documentation/uikit/reference/
    UIApplicationDelegate_Protocol/Reference/Reference.html
    

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