ios - local notification are sent at wrong time -

i want sent 2 local notifications daily @ particular time in ios,

but notifications sent @ wrong time , sends multiple times in day , not once,

here code snippet,

- (bool)application:(uiapplication *)application didfinishlaunchingwithoptions:(nsdictionary *)launchoptions {   // running on ios8?     if ([application respondstoselector:@selector(registerusernotificationsettings:)])     {         uiusernotificationsettings *settings = [uiusernotificationsettings settingsfortypes:(uiusernotificationtypebadge|uiusernotificationtypealert|uiusernotificationtypesound) categories:nil];         [application registerusernotificationsettings:settings];     }     else // ios 7 or earlier     {         uiremotenotificationtype mytypes = uiremotenotificationtypebadge | uiremotenotificationtypealert | uiremotenotificationtypesound;         [application registerforremotenotificationtypes:mytypes];     }     application.applicationiconbadgenumber = 0;          //this if called once....      if ([prefs stringforkey:@"notification"] == nil)       {    //... 1st notification ...      nsdate *now = [nsdate date];     nscalendar *calendar = [[nscalendar alloc] initwithcalendaridentifier:nsgregoriancalendar];     nsdatecomponents *components = [calendar components:nsyearcalendarunit|nsmonthcalendarunit|nsdaycalendarunit fromdate:now];     [components sethour:11];     [components setminute:24];      // gives today's date @ 11am     nsdate *next11am = [calendar datefromcomponents:components];     if ([next11am timeintervalsincenow] < 0) {         // if today's 9am occurred, add 24hours tomorrow's         next11am = [next11am datebyaddingtimeinterval:60*60*24];     }      uilocalnotification *notification = [[uilocalnotification alloc] init];     notification.firedate = next11am;     notification.alertbody = @"notification 1.";     // set repeat interval daily     notification.repeatinterval = nsdaycalendarunit;     [[uiapplication sharedapplication] schedulelocalnotification:notification];     //... 2nd notification ...      nsdate *now1 = [nsdate date];     nscalendar *calendar1 = [[nscalendar alloc] initwithcalendaridentifier:nsgregoriancalendar];     nsdatecomponents *components1 = [calendar1 components:nsyearcalendarunit|nsmonthcalendarunit|nsdaycalendarunit fromdate:now1];     [components1 sethour:18];     [components1 setminute:30];      // gives today's date @ 9am     nsdate *next6pm = [calendar datefromcomponents:components];     if ([next6pm timeintervalsincenow] < 0) {         // if today's 6pm occurred, add 24hours tomorrow's         next6pm = [next6pm datebyaddingtimeinterval:60*60*24];     }      uilocalnotification *notification1 = [[uilocalnotification alloc] init];     notification1.firedate = next6pm;     notification1.alertbody = @"notification 2.";       // set repeat interval daily     notification1.repeatinterval = nsdaycalendarunit;     [[uiapplication sharedapplication] schedulelocalnotification:notification1];   }   } 

where doing mistake ? please help

thanks in advance!!

you check [prefs stringforkey:@"notification"], haven't defined prefs nil, , never appear set value notification missing. of these things mean you're adding when don't expect to.

you're calling schedulelocalnotification: calling cancellocalnotification: or cancelalllocalnotifications so, depending on how user uses app, or how you're doing testing, can adding multiple notifications @ same time. use scheduledlocalnotifications check scheduled.

you should using currentcalendar calendar need respect users settings.