How to make application become active when it reaches the specific time equal to the current time in iPhone using Objective-c

-(void)sendInAppSMS
{
    NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar];

    // Get the current date
    NSDate *pickerDate = [self->datePicker date];

    // Break the date up into components
    NSDateComponents *dateComponents = [calendar components:( NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit )
                                                   fromDate:pickerDate];
    NSDateComponents *timeComponents = [calendar components:( NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit )
                                                   fromDate:pickerDate];
    // Set up the fire time
    NSDateComponents *dateComps = [[NSDateComponents alloc] init];
    [dateComps setDay:[dateComponents day]];
    [dateComps setMonth:[dateComponents month]];
    [dateComps setYear:[dateComponents year]];
    [dateComps setHour:[timeComponents hour]];
    // Notification will fire in one minute
    [dateComps setMinute:[timeComponents minute]];
//  [dateComps setSecond:[timeComponents second]];
    NSDate *itemDate = [calendar dateFromComponents:dateComps];
    //[dateComps release];

    UILocalNotification *localNotif = [[UILocalNotification alloc] init];
    if (localNotif == nil)
        return;
    localNotif.fireDate = itemDate;
    localNotif.timeZone = [NSTimeZone defaultTimeZone];
    localNotif.repeatInterval=1;

    // Notification details
    localNotif.alertBody = [textFieldRounded1 text];
    // Set the action button
    localNotif.alertAction = @"View";

    localNotif.soundName = UILocalNotificationDefaultSoundName;
//    localNotif.applicationIconBadgeNumber = 5;

    // Specify custom data for the notification
    NSDictionary *infoDict = [NSDictionary dictionaryWithObject:@"someValue" forKey:@"someKey"];
    localNotif.userInfo = infoDict;

    // Schedule the notification
    [[UIApplication sharedApplication] scheduleLocalNotification:localNotif];
    //[localNotif release];

    NSLog(@"SendMessage");

    if([textFieldRounded.text isEqualToString:@""] || [textFieldRounded1.text isEqualToString:@""] || [textFieldRounded2.text isEqualToString:@""] || [textFieldRounded.text isEqualToString:@"(null)"] ||  [textFieldRounded1.text isEqualToString:@"(null)"] ||  [textFieldRounded1.text isEqualToString:@"(null)"] || [textFieldRounded.text isEqualToString:nil]  || [textFieldRounded1.text isEqualToString:nil]|| [textFieldRounded2.text isEqualToString:nil])
    {
        UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"SMS" message:@"Please Enter All Fields!" delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
        [alert show];
    }
    else
    {
        NSLog(@"Done");

        NSDateFormatter *SentTime = [[NSDateFormatter alloc] init];
        [SentTime setDateFormat:@"dd/MM/YYYY hh:mm aa"];
        NSDate *now1 = [NSDate date];
        NSString *Time1 = [SentTime stringFromDate:now1];
        NSLog(@"Time is :%@",Time1);
        NSString *Sentime=[NSString stringWithFormat:@"%@",textFieldRounded2.text];


        if([Sentime isEqualToString:Time1])
        {
            NSLog(@"Time Matching... can send msg now");

            MFMessageComposeViewController *controller = [[MFMessageComposeViewController alloc] init];
            if([MFMessageComposeViewController canSendText])
            {

                NSString *Message = [NSString stringWithFormat:@"%@, %@",textFieldRounded1.text,textFieldRounded2.text];
                NSLog(@"Message is %@", Message);
                controller.body = Message;
                controller.recipients = [NSArray arrayWithObjects:@"+919994442409" , nil];
                controller.messageComposeDelegate = self;
                [self presentModalViewController:controller animated:YES];

            }

        }
        else
        {
            NSLog(@"Send Message when time reach at %@",textFieldRounded2.text);

            NSUserDefaults *userDefault=[NSUserDefaults standardUserDefaults];
            [textFieldRounded resignFirstResponder];
            [textFieldRounded1 resignFirstResponder];
            [textFieldRounded2 resignFirstResponder];

            NSString *To = [textFieldRounded text];
            NSString *Msg  = [textFieldRounded1 text];
            NSString *Timee = [textFieldRounded2 text];

            [userDefault setValue:To forKey:@"receiptent"];
            [userDefault setValue:Msg forKey:@"contentt"];
            [userDefault setValue:Timee forKey:@"Tim"];
            [userDefault synchronize];
            NSLog(@"Data saved");

            NSString *To1 = [userDefault valueForKey:@"receiptent"];
            NSString *Msg1 = [userDefault valueForKey:@"contentt"];
            NSString *Timee1 = [userDefault valueForKey:@"Tim"];

            NSLog(@"Receiptent No: %@",To1);
            NSLog(@"Message Content is : %@",Msg1);
            NSLog(@"Sent Time Is : %@",Timee1);


            UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"SMS" message:@"Message Will Send At Time" delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
            [alert show];

            //NSString *laterMessage =[NSString stringWithFormat:@"%@",textFieldRounded1.text];
        }

    }