ios - didReceiveRemoteNotification not working in the background -

i'm working on big app huge chunk of legacy code. - there's implementation for:

- (void) application:(uiapplication *)application didreceiveremotenotification:(nsdictionary *)userinfo 

the problem is called when app in foreground or when user taps the notification while app in background. tried implement:

- (void) application:(uiapplication *)application didreceiveremotenotification:(nsdictionary *)userinfo fetchcompletionhandler:(void (^)(uibackgroundfetchresult))completionhandler 

but app behaves same. in case - method not called when app in background. problem?

implementing didreceiveremotenotification , didreceiveremotenotification:fetchcompletionhandler correct way, need following:

make sure register remote notifications, see documentation here:

- (bool)application:(uiapplication *)application didfinishlaunchingwithoptions:(nsdictionary *)launchoptions {         [[uiapplication sharedapplication] registerforremotenotificationtypes:(uiremotenotificationtypealert | uiremotenotificationtypebadge | uiremotenotificationtypesound)];      return yes; } 

also make sure edit info.plist , check "enable background modes" , "remote notifications" check boxes:

additionally, need add "content-available":1 push notification payload, otherwise app won't woken if it's in background (see documentation here):

for push notification trigger download operation, notification’s payload must include content-available key value set 1. when key present, system wakes app in background (or launches background) , calls app delegate’s application:didreceiveremotenotification:fetchcompletionhandler: method. implementation of method should download relevant content , integrate app

so payload should @ least this:

{     aps = {         "content-available" : 1,         sound : ""     }; }