schedule - iOS How to set application reminders -

we creating app reminds user tasks. user can choose recieve reminder on following bases:

one time, daily, weekly, weekly (on specific week day), every 2 weeks, once month

the reminders should custom popup in app and/or popup if application closed. question is, best way go setting reminders these?

the way i'm thinking doing load phone's sqlite database , checking reminders each time app starts up, , if reminder is, let's daily one, app automatically set next reminder. have no idea how i'm going rest yet.

thanks

i in app using nslocalnotification

uilocalnotification *localnotification = [[uilocalnotification alloc] init]; if (localnotification == nil)     return; localnotification.firedate = datetoremindon; localnotification.timezone = [nstimezone defaulttimezone];  // details localnotification.alertbody = @"alert message"; // set button title localnotification.alertaction = @"view"; localnotification.soundname = uilocalnotificationdefaultsoundname;  // custom data notification use later nsdictionary *infodict = [nsdictionary dictionarywithobject:reminderid forkey:@"remindid"]; localnotification.userinfo = infodict;  // schedule notification [[uiapplication sharedapplication] schedulelocalnotification:localnotification]; 

this create local notification , can store information might need in user info dictionary , available when received or opened.

use method in appdelegate check if app opened local notification.

- (bool)application:(uiapplication *)application didfinishlaunchingwithoptions:(nsdictionary *)launchoptions {      // handle launching notification     uilocalnotification *localnotification =     [launchoptions objectforkey:uiapplicationlaunchoptionslocalnotificationkey];     if (localnotification) {         //handle local notification     } } 

and use method in app delegate catch when local notification received while app open

- (void)application:(uiapplication *)app didreceivelocalnotification:(uilocalnotification *)notif {     // handle notification when app running }