You have to do several things in order to manage the received push notification when the app is in background.
First, in your server side, you have to set {"aps":{"content-available" : 1... / $body['aps']['content-available'] =1; in the push notification payload.
Second, in your Xcode project, yo have to habilitate "remote notifications". It is made by going to the project's target -> capabilities, then enable the capabilities switch, and check the remote notifications checkbox.
Third, instead of using didReceiveRemoteNotification, you have to call application:didReceiveRemoteNotification:fetchCompletionHandler:, this will allow you to do the tasks that you want in the background, at the moment of receiving the notification:
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler
{
if(application.applicationState == UIApplicationStateInactive) {
NSLog(@"Inactive - the user has tapped in the notification when app was closed or in background");
//do some tasks
[self manageRemoteNotification:userInfo];
completionHandler(UIBackgroundFetchResultNewData);
}
else if (application.applicationState == UIApplicationStateBackground) {
NSLog(@"application Background - notification has arrived when app was in background");
NSString* contentAvailable = [NSString stringWithFormat:@"%@", [[userInfo valueForKey:@"aps"] valueForKey:@"content-available"]];
if([contentAvailable isEqualToString:@"1"]) {
// do tasks
[self manageRemoteNotification:userInfo];
NSLog(@"content-available is equal to 1");
completionHandler(UIBackgroundFetchResultNewData);
}
}
else {
NSLog(@"application Active - notication has arrived while app was opened");
//Show an in-app banner
//do tasks
[self manageRemoteNotification:userInfo];
completionHandler(UIBackgroundFetchResultNewData);
}
}
Finally, you have to add this notification type: UIRemoteNotificationTypeNewsstandContentAvailability to the notifications settings when you set it.
Apart from this, if your app was closed when the notification arrived, you have to manage this in didFinishLaunchingWithOptions , and just if the user taps on the push notification: The way of do it is:
if (launchOptions != nil)
{
NSDictionary *dictionary = [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey];
if (dictionary != nil)
{
NSLog(@"Launched from push notification: %@", dictionary);
[self manageRemoteNotification:dictionary];
}
}
launchOptions is != nil when you launch the app by tapping on the push notification, if you access it by tapping on the icon, launchOptions will be == nil.
I hope it will be useful. Here it is explained by Apple.
