In macOS 10.9+ & iOS 8+, there’s a method on NSCalendar/Calendar that does exactly this! – (BOOL)isDateInToday:(NSDate *)date So you’d simply do Objective-C: BOOL today = [[NSCalendar currentCalendar] isDateInToday:date]; Swift 3: let today = Calendar.current.isDateInToday(date)
Your statement The problem with the above method is that you can only set one unit of time … is not correct. NSCalendarUnit conforms to the RawOptionSetType protocol which inherits from BitwiseOperationsType. This means that the options can be bitwise combined with & and |. In Swift 2 (Xcode 7) this was changed again to … Read more
As of Swift 2, NS_OPTIONS (such as NSCalendarOptions) are mapped to Swift as a OptionSetType which offers a set-like interface. In particular, “no options” can now be specified as [] instead of nil: let components = cal.components(unit, fromDate: calcDesp!, toDate: calHoy!, options: []) See also Swift 2.0 – Binary Operator “|” cannot be applied to … 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
You cannot set custom repeat intervals with UILocalNotification. This has been asked before (see below) but only limited options are provided. The repeatInterval parameter is an enum type and it limited to specific values. You cannot multiply those enumerations and get multiples of those intervals. You cannot have more than 64 local notifications set in … Read more
Swift 2 The NSCalendarUnit names have changed in Swift 2. Also, now we have to pass these arguments in an OptionSet, like this: let components = calendar.components([.Hour, .Minute, .Second, .Nanosecond], fromDate: date) Swift 3 Many things have changed, according to the Swift API Design Guidelines. Updated syntax: let date = Date() let calendar = Calendar.current() … Read more
Just add one day unit to the date until it reaches the current date (Swift 2 code): var date = startDateNSDate // first date let endDate = NSDate() // last date // Formatter for printing the date, adjust it according to your needs: let fmt = NSDateFormatter() fmt.dateFormat = “dd/MM/yyyy” // While date <= endDate … 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
Edit: This does not check the edge case where the beginning of the week starts in the prior month. Some updated code to cover this: https://stackoverflow.com/a/14688780/308315 In case anyone is still paying attention to this, you need to use ordinalityOfUnit:inUnit:forDate: and set firstWeekday to 2. (1 == Sunday and 7 == Saturday) Here’s the code: … Read more
Because this is apparently my most popular answer, I’ll try to edit it to contain a little bit more information. Despite its name, NSDate in and of itself simply marks a point in machine time, not a date. There’s no correlation between the point in time specified by an NSDate and a year, month, or … Read more