How to combine date and time from two UIDatePickers? - iphone

Question

I have two UIDatePickers in my app, one mode is for selecting date and other to time mode. I have fired a notification when the exact date and time is reached. I'm able to fire the reminder at correct time, but the problem is that the date is not checked. Is there any way to check the date and time at the same time??
Thanx in advance...
Edit
NSDate *date1 = [datePicker date];
NSDate *date2 = [timePicker date];
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
unsigned unitFlagsDate = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit;
NSDateComponents *dateComponents = [gregorian components:unitFlagsDate fromDate:date1];
unsigned unitFlagsTime = NSHourCalendarUnit | NSMinuteCalendarUnit ;
NSDateComponents *timeComponents = [gregorian components:unitFlagsTime fromDate:date2];
[dateComponents setHour:[timeComponents hour]];
[dateComponents setMinute:[timeComponents minute]];
NSDate *combDate = [gregorian dateFromComponents:dateComponents];
UILocalNotification *localNotif = [[UILocalNotification alloc] init];
if (localNotif == nil) return;
NSDate *fireTime = combDate;
localNotif.fireDate = fireTime;
localNotif.alertBody = #"Alert!";
localNotif.soundName = UILocalNotificationDefaultSoundName;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotif];

Answer 1

NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *dateComponents = [calendar components:NSDayCalendarUnit|NSMonthCalendarUnit|NSYearCalendarUnit fromDate:self.datePicker.date];
NSDateComponents *timeComponents = [calendar components:NSHourCalendarUnit|NSMinuteCalendarUnit fromDate:self.timePicker.date];
NSDateComponents *newComponents = [[NSDateComponents alloc]init];
newComponents.timeZone = [NSTimeZone systemTimeZone];
[newComponents setDay:[dateComponents day]];
[newComponents setMonth:[dateComponents month]];
[newComponents setYear:[dateComponents year]];
[newComponents setHour:[timeComponents hour]];
[newComponents setMinute:[timeComponents minute]];
NSDate *combDate = [calendar dateFromComponents:newComponents];
NSLog(#" \ndate : %# \ntime : %#\ncomDate : %#",self.datePicker.date,self.timePicker.date,combDate);

Answer 2

Swift 5 version of the accepted answer if it might help.
/// Returns `Date` from date and time.
func combine(date: Date, time: Date) -> Date? {
let calendar = Calendar.current
let dateComponents = calendar.dateComponents([.day, .month, .year], from: date)
let timeComponents = calendar.dateComponents([.hour, .minute, .second], from: time)
var newComponents = DateComponents()
newComponents.timeZone = .current
newComponents.day = dateComponents.day
newComponents.month = dateComponents.month
newComponents.year = dateComponents.year
newComponents.hour = timeComponents.hour
newComponents.minute = timeComponents.minute
newComponents.second = timeComponents.second
return calendar.date(from: newComponents)
}

Answer 3

Try this:
Convert date into NSString and Time into NSString.
Apppend Time into date string.
Now convert that final string into NSDate
Example: (Add validations from ur side)
NSDate *date1 = [datePicker date];
NSDate *date2 = [timePicker date];
NSString *date = [NSString stringWithFormat:#"%#",date1];
NSString *time = [NSString stringWithFormat:#"%#",date2];
NSString *dateAndTime = [NSString stringWithFormat:#"%# %#",date,time];
NSDate *dateTime = [self dateFromString:dateAndTime];
- (NSDate*) dateFromString:(NSString*)aStr
{
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setLocale:[[[NSLocale alloc] initWithLocaleIdentifier:#"en_US_POSIX"] autorelease]];
//[dateFormatter setDateFormat:#"YYYY-MM-dd HH:mm:ss a"];
[dateFormatter setDateFormat:#"MM/dd/yyyy HH:mm:ss a"];
[dateFormatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
NSLog(#"%#", aStr);
NSDate *aDate = [dateFormatter dateFromString:aStr];
[dateFormatter release];
return aDate;
}