本地通知问题

Question

i am using following code for local notification

 for (int i=0;i<newBirthDates.count;i++)
{
    NSDate *date =[Formatter1 dateFromString:[newBirthDates objectAtIndex:i ]];
    NSComparisonResult result = [date compare:todaydate];
    if(result == NSOrderedSame)
    {
        UILocalNotification *localNotif = [[UILocalNotification alloc] init];
        localNotif.fireDate = date;
        localNotif.timeZone = [NSTimeZone defaultTimeZone];
        localNotif.alertBody = @"birthdate notification";
        localNotif.alertAction = @"View";

        localNotif.soundName = UILocalNotificationDefaultSoundName;
        localNotif.applicationIconBadgeNumber = 1;
        [[UIApplication sharedApplication] scheduleLocalNotification:localNotif];
    }
}
  newBirthdate is array with dates in it
  Formatter1 =MM/dd.

lets say one of the date in newbrithdate is 18/3 so what i do is i change my computer
date to 17/3 and 11.59 pm then i wait for 1 minute and it turn 18/3 but i dont get any any notification time in my simulator always same to my computer time.

Answer 1

You are storing formatted date string in array(in MM/dd format) and converting it back to date for setting notification.

Lets do you a simple check!!

NSDateFormatter *Formatter1 = [[NSDateFormatter alloc]init];
Formatter1.dateFormat =@"MM/dd";

NSDate *today = [NSDate date];// take current date
NSString *initialDateString =[Formatter1 stringFromDate:today]; // formatted date string(in MM/dd)


NSDate *dateFromFormatter = [Formatter1 dateFromString:initialDateString]; // Date from the formatted string(In your case taking from array)
NSString *finalDateString = [Formatter1 stringFromDate:dateFromFormatter];// formatted string from new date

// lets take a look wether both are same
NSLog(@"Initial date string: %@",initialDateString);
NSLog(@"Final date string  : %@",finalDateString);
// Both date strings are same

NSLog(@"Actual date    : %@",today);
NSLog(@"Formatted date : %@",dateFromFormatter);
//But see both dates are entirely different

output

Initial date string: 03/18
Final date string : 03/18
Actual date : 2013-03-18 12:15:45 +0000
Formatted date : 2000-03-17 18:30:00 +0000

Then how will you get notification??