According to Apple documentation of NSDate compare: Returns an NSComparisonResult value that indicates the temporal ordering of the receiver and another given date. – (NSComparisonResult)compare:(NSDate *)anotherDate Parameters anotherDate The date with which to compare the receiver. This value must not be nil. If the value is nil, the behavior is undefined and may change in … Read more
@Chuck’s answer is correct, and lead me to the following code. Thought I’d share: NSDateComponents *comps = [[NSDateComponents alloc] init]; [comps setDay:10]; [comps setMonth:10]; [comps setYear:2010]; NSDate *date = [[NSCalendar currentCalendar] dateFromComponents:comps];
Swift 3/4/5: Calendar.current.isDateInToday(yourDate) Calendar.current.isDateInYesterday(yourDate) Calendar.current.isDateInTomorrow(yourDate) Additionally: Calendar.current.isDateInWeekend(yourDate) Note that for some countries weekend may be different than Saturday-Sunday, it depends on the calendar. You can also use autoupdatingCurrent instead of current calendar, which will track user updates. You use it the same way: Calendar.autoupdatingCurrent.isDateInToday(yourDate) Calendar is a type alias for the NSCalendar.
In Swift 3.0 Apple removed ‘NS’ prefix and made everything simple. Below is the way to get hour, minute and second from ‘Date’ class (NSDate alternate) let date = Date() let calendar = Calendar.current let hour = calendar.component(.hour, from: date) let minutes = calendar.component(.minute, from: date) let seconds = calendar.component(.second, from: date) print(“hours = \(hour):\(minutes):\(seconds)”) … Read more
Your attempt to calculate elapsedTime is incorrect. In Swift 3, it would be: let elapsed = Date().timeIntervalSince(timeAtPress) Note the () after the Date reference. The Date() instantiates a new date object, and then timeIntervalSince returns the time difference between that and timeAtPress. That will return a floating point value (technically, a TimeInterval). If you want … Read more
Swift 3 and 4 drop-in extensions This actually gets a lot easier with Swift 3+: You can do it without guard (you could if you wanted to, but because DateComponents is a non-optional type now, it’s no longer necessary). Using iOS 8’s startOfDayForDate (now startOfDay), you don’t need to manually set the time to 12pm … Read more
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease]; [dateFormatter setDateFormat:@”EEEE”]; NSLog(@”%@”, [dateFormatter stringFromDate:[NSDate date]]); outputs current day of week as a string in locale dependent on current regional settings. To get just a week day number you must use NSCalendar class: NSCalendar *gregorian = [[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar] autorelease]; NSDateComponents *comps = [gregorian components:NSWeekdayCalendarUnit fromDate:[NSDate date]]; int … Read more
Swift 3 & 4 Retrieving the day of the week’s number is dramatically simplified in Swift 3 because DateComponents is no longer optional. Here it is as an extension: extension Date { func dayNumberOfWeek() -> Int? { return Calendar.current.dateComponents([.weekday], from: self).weekday } } // returns an integer from 1 – 7, with 1 being Sunday … Read more
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]; … Read more
NSDate *date1 = [NSDate dateWithString:@”2010-01-01 00:00:00 +0000″]; NSDate *date2 = [NSDate dateWithString:@”2010-02-03 00:00:00 +0000″]; NSTimeInterval secondsBetween = [date2 timeIntervalSinceDate:date1]; int numberOfDays = secondsBetween / 86400; NSLog(@”There are %d days in between the two dates.”, numberOfDays); EDIT: Remember, NSDate objects represent exact moments of time, they do not have any associated time-zone information. When you convert … Read more