ios - How to call a mapview current location zoom in method from appdelegate correctly? -


i have tried using method, reason wont zoom in on current location. there doing wrong?

appdelegate.m 

 -(void)handlenetworkchange {     self.reachability = [reachability reachabilityforinternetconnection];     [self.reachability startnotifier];     networkstatus remotehoststatus = [self.reachability currentreachabilitystatus];     mapviewcontroller *mapviewcontroller = [[mapviewcontroller alloc]init];     if(remotehoststatus == notreachable)     {         self.internetreachable = no;     }     else     {         self.internetreachable = yes;         [mapviewcontroller userlocation];     }     }

mapviewcontroller.m

-(void)userlocation {     mkcoordinateregion mapregion;     mapregion.center.latitude = self.mapview.userlocation.coordinate.latitude;     mapregion.center.longitude = self.mapview.userlocation.coordinate.longitude;     mapregion.span.latitudedelta = 0.2;     mapregion.span.longitudedelta = 0.2;     [self.mapview setregion:mapregion animated:yes]; }

i use nsnotificationcenter. set listener waits post notification, once post norification received fire selector

here how (very simple actually)

this needs go in view controller present map, best in viewdidload

[[nsnotificationcenter defaultcenter] addobserver:self         selector:@selector(runthisfunctionwhenready:)          name:@"testnotification"         object:nil];

he zoom method should placed in same viewcontroller - so:

-(void)runthisfunctionwhenready {    // zoom map , other funky stuff }

now, anywhere in app (delegate included) can fire posting notification this:

 [[nsnotificationcenter defaultcenter]          postnotificationname:@"testnotification"          object:self];

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