How to Get Hour and Minutes from Nsdate

How do I get hour and minutes from NSDate?

Use an NSDateFormatter to convert string1 into an NSDate, then get the required NSDateComponents:

Obj-C:

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"<your date format goes here"];
NSDate *date = [dateFormatter dateFromString:string1];
NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *components = [calendar components:(NSCalendarUnitHour | NSCalendarUnitMinute) fromDate:date];
NSInteger hour = [components hour];
NSInteger minute = [components minute];

Swift 1 and 2:

let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "Your date Format"
let date = dateFormatter.dateFromString(string1)
let calendar = NSCalendar.currentCalendar()
let comp = calendar.components([.Hour, .Minute], fromDate: date)
let hour = comp.hour
let minute = comp.minute

Swift 3:

let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "Your date Format"
let date = dateFormatter.date(from: string1)
let calendar = Calendar.current
let comp = calendar.dateComponents([.hour, .minute], from: date)
let hour = comp.hour
let minute = comp.minute

More about the dateformat is on the official unicode site

Swift NSDate create var with hour and minute only

The quick way, getting the nsdate from your string elements and then convert the nsdate back to a string if you want to :

let formatter = NSDateFormatter()
formatter.dateFormat = "HH:mm"
let hour = 08
let minutes = 32
let time = formatter.dateFromString("\(hour):\(minutes)")!
let finalTime = formatter.stringFromDate(time)
print(time)
print(finalTime)

How to change the current day's hours and minutes in Swift?

Be aware that for locales that uses Daylight Saving Times, on clock change days, some hours may not exist or they may occur twice. Both solutions below return a Date? and use force-unwrapping. You should handle possible nil in your app.

Swift 3, 4, 5 and iOS 8 / OS X 10.9 or later

let date = Calendar.current.date(bySettingHour: 9, minute: 30, second: 0, of: Date())!

Swift 2

Use NSDateComponents / DateComponents:

let gregorian = NSCalendar(calendarIdentifier: NSCalendarIdentifierGregorian)!
let now = NSDate()
let components = gregorian.components([.Year, .Month, .Day, .Hour, .Minute, .Second], fromDate: now)

// Change the time to 9:30:00 in your locale
components.hour = 9
components.minute = 30
components.second = 0

let date = gregorian.dateFromComponents(components)!

Note that if you call print(date), the printed time is in UTC. It's the same moment in time, just expressed in a different timezone from yours. Use a NSDateFormatter to convert it to your local time.

In Objective-C, to get the current hour and minute as integers, we need to use NSDateComponents and NSCalendar?

NSDate just holds the time that has passed since a certain reference date, to get more meaningful numbers out of this (eg. after taking care of DST, leap years and all the other stupid time stuff), you have to use NSDateComponents with the appropriate NSCalendar.

How to set hour/minute/second in NSDateComponents with a string?

This is the correct answer. You must separate the string individually, and input them into the components.

NSArray *results = [storeOpen componentsSeparatedByString:@":"];
if ([results count] == 3) {
    NSLog(@"1 - %d", [[results objectAtIndex:0] intValue]);
    NSLog(@"2 - %d", [[results objectAtIndex:1] intValue]);
    NSLog(@"3 - %d", [[results objectAtIndex:2] intValue]);

NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *comps = [calendar components: NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit fromDate:[NSDate date]];
[comps setHour:[[results objectAtIndex:0] intValue]];
[comps setMinute:[[results objectAtIndex:1] intValue]];
[comps setSecond:[[results objectAtIndex:2] intValue]];

NSDate *dateFromComps = [calendar dateFromComponents:comps];

NSDate zero out hour minuts and seconds

Always helpful:

WWDC Videos

2011 Session 117 - Performing Calendar Calculations

2013 Session 227 - Solutions to Common Date and Time Challenges

This contains the information you probably want:

Session 227 @ 13m25s, "Common Operations" / "Calculate Midnight".

How to set hour minute in nsdate programmatically?

If you need to calculate specific real instances in time e.g. 3:20:30 PM Oct 23, 2010, then you want to use NSCalendar which lets you decompose dates and do date related calculations.

Word of warning. Date and time calculations are surprisingly complex and detailed. Expect to spend a couple of hours learning the API.

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