As with all date manipulation you have to use NSDateComponents and NSCalendar
NSDate *now = [NSDate date];
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier: NSCalendarIdentifierGregorian];
NSDateComponents *components = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay fromDate:now];
[components setHour:10];
NSDate *today10am = [calendar dateFromComponents:components];
in iOS8 Apple introduced a convenience method that saves a few lines of code:
NSDate *d = [calendar dateBySettingHour:10 minute:0 second:0 ofDate:[NSDate date] options:0];
Swift:
let calendar: NSCalendar! = NSCalendar(calendarIdentifier: NSCalendarIdentifierGregorian)
let now: NSDate! = NSDate()
let date10h = calendar.dateBySettingHour(10, minute: 0, second: 0, ofDate: now, options: NSCalendarOptions.MatchFirst)!
NSDate *currentDate = [NSDate date];
NSDateComponents *comps = [[NSDateComponents alloc] init];
[comps setHour:10];
NSDate *date = [gregorian dateByAddingComponents:comps toDate:currentDate options:0];
[comps release];
Not tested in xcode though :)
I just set the timezone with Matthias Bauch answer And it worked for me. else it was adding 18:30 min more.
let cal: NSCalendar = NSCalendar.currentCalendar()
cal.timeZone = NSTimeZone(forSecondsFromGMT: 0)
let newDate: NSDate = cal.dateBySettingHour(1, minute: 0, second: 0, ofDate: NSDate(), options: NSCalendarOptions())!
this nsdate used different format:
NSDateFormatter *format = [[NSDateFormatter alloc] init];
[format setDateFormat:@"MMM dd, yyyy HH:mm"];
NSDate *now = [[NSDate alloc] init];
NSString *dateString = [format stringFromDate:now];
NSDateFormatter *inFormat = [[NSDateFormatter alloc] init];
[inFormat setDateFormat:@"MMM dd, yyyy"];
NSDate *parsed = [inFormat dateFromString:dateString];
You can use this method for any minute / hour / period (aka am/pm) combination:
- (NSDate *)todayModifiedWithHours:(NSString *)hours
minutes:(NSString *)minutes
andPeriod:(NSString *)period
{
NSDate *todayModified = NSDate.date;
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [calendar components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit|NSMinuteCalendarUnit fromDate:todayModified];
[components setMinute:minutes.intValue];
int hour = 0;
if ([period.uppercaseString isEqualToString:@"AM"]) {
if (hours.intValue == 12) {
hour = 0;
}
else {
hour = hours.intValue;
}
}
else if ([period.uppercaseString isEqualToString:@"PM"]) {
if (hours.intValue != 12) {
hour = hours.intValue + 12;
}
else {
hour = 12;
}
}
[components setHour:hour];
todayModified = [calendar dateFromComponents:components];
return todayModified;
}
Requested Example:
NSDate *todayAt10AM = [self todayModifiedWithHours:@"10"
minutes:@"00"
andPeriod:@"am"];
Source: Stackoverflow.com