How to combine date and time from two UIDatePickers?

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.

Answer 1

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;
}

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

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);