title: Set repeatInterval in local notification
body: <p>I want to set repeat interval to the value which user selects from date picker.I have date picker of type countdown mode in my application.If user selects 4 hours 15 minutes from date picker then I am setting firedate using the following code and alarm rings.</p>
  
  <pre><code> [NSDate dateWithTimeIntervalSinceNow:[pickerTimer countDownDuration]] 
  </code></pre>
  
  <p>But I want that notification should repeat after every 4 hours 15 minutes until user cancels it. I have done r&amp;d searched a lot but I can not figure out.The code  I have used so far is:</p>
  
  <pre><code>localNotification = [[UILocalNotification alloc] init]; 
  [localNotification setFireDate:[NSDate dateWithTimeIntervalSinceNow:[pickerTimer countDownDuration]]]; 
  
  if(localNotification.fireDate){
  
      [self _showAlert:@"Time is scheduled" withTitle:@"Daily Achiever"];
  }
  localNotification.timeZone = [NSTimeZone systemTimeZone];
  
  
  localNotification.alertBody=@"alaram";
  localNotification.soundName = UILocalNotificationDefaultSoundName;
  [localNotification setAlertAction:@"View"];
  [localNotification setRepeatInterval:[pickerTimer countDownDuration]];
  
  //The button's text that launches the application and is shown in the alert
  // [localNotification setAlertBody:[alertBodyField text]]; //Set the message in the notification from the textField's text
  //[localNotification setHasAction: YES]; //Set that pushing the button will launch the application
  [localNotification setApplicationIconBadgeNumber:[[UIApplication sharedApplication] applicationIconBadgeNumber]]; //Set the Application Icon Badge Number of the application's icon to the current Application Icon Badge Number plus 1
  
    localNotification.applicationIconBadgeNumber = 1;
  
  localNotification.repeatInterval=NSHourCalendarUnit;
  
  [[UIApplication sharedApplication] scheduleLocalNotification:localNotification]; //Schedule the notification with the system
  
  //[alertNotification setHidden:NO]; //Set the alertNotification to be shown showing the user that the application has registered the local notification
  </code></pre>
  
  <p>Please help me to solve. Thanks a lot in advance.</p>