nsdatecomponents

问题 I have a method which extracts the hour and second components form a NSDate by breaking it down into its NSDateComponents. My code is as follows... unsigned hourAndMinuteFlags = NSHourCalendarUnit | NSMinuteCalendarUnit; NSCalendar* calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; [calendar setTimeZone:[NSTimeZone timeZoneWithName:@"GMT"]]; NSDateComponents* travelDateTimeComponents = [calendar components:hourAndMinuteFlags fromDate:travelDate]; NSString* hours

问题 I am expecting 2010-10-11 00:00:00 But instead I receive 2010-10-10 21:00:00 +0000 I know, that I can add a few hours and receive desired date, but I do not understand why I get previous day with 21 hours... Please, help! NSDateComponents *comps = [[NSDateComponents alloc] init]; [comps setYear:2010]; [comps setMonth:10]; [comps setDay:11]; [comps setHour:0]; [comps setMinute:0]; [comps setSecond:0]; NSCalendar *cal = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; NSDate

问题 I want to get the last weekday of a given month. I've come across this simple answer on how to get the 1st/2nd/... weekday which works well. The question is: How to get the last weekday of a given month? Not every month has only 4 Sundays, so do I have to count the number of Sundays of the month, or is there a more elegant way to do this? 回答1: Had the same need recently, and the best I could come up with is the following, which is meant to be run every day to check if the current day is the

问题 I am trying to create dateComponents from Date stored in CoreData from UIDatePicker. However, I am not able to make it. I am first converting Date which is stored in editnotes?.sSelectedDate into dateComponents and then using the dateComponents for triggering my notifications. Here is what I am doing: var date = Date() if let editnote = editnotes { date = editnote.sSelectedDate } else { print("nil") } let calendar = NSCalendar.current let unitFlags = Set<Calendar.Component>([.day, .month,

问题 This question already has answers here : Getting the difference between two NSDates in (months/days/hours/minutes/seconds) (18 answers) Closed 4 years ago . Hi Im trying to work out the time between two dates using UIpickers and I am lost. I cannot fathom where to go to on this to get the value to plug into the label. Im not sure if I should use components or before the comparison or just after to put it in the label. Thanks for any pointers. let calendar = NSCalendar.currentCalendar() let

问题 I am using CloudKit with Swift for iOS. I am saving an object of type DateComponents in a CloudKit field of type Bytes. When I retrieve the object, it does not have the same value as the object I originally saved. Here is the code where I save the object to CloudKit: let unsafePointer: UnsafePointer<DateComponents> = UnsafePointer<DateComponents>(&time) let unsafeBufferPointer: UnsafeBufferPointer<DateComponents> = UnsafeBufferPointer<DateComponents>(start: unsafePointer, count: 1) let data:

问题 In my app, I have to set up a weekly reminder so that an alert goes off at the same day/time, a week from now. I have been using NSDateComponenents.week = 1 and adding that to an NSDate, using NSCalendar's dateByAddingComponents:toDate:options: API. It seems that week is now being deprecated in iOS7, and the warning tells me to "Use weekOfMonth or weekOfYear, depending on which you mean". But I can't find much documentation about what either of them means. Can anyone explain the difference

问题 I have a function func createDate(day: Int, month: Int, year: Int) -> NSDate { var comp = NSDateComponents() comp.day = day comp.month = month comp.year = year var cal = NSCalendar.currentCalendar() if var date = cal.dateFromComponents(comp) { return date } return NSDate() } If I call it with createDate(07, 01, 1984) the output is 1984-01-06 23:00:00 +0000 . I assume that there is some influence from the time zone. How can I adjust my code so that the output will be 1984-01-07 00:00:00 +0000

问题 I'm trying to store a time of day in a Date: let calendar = NSCalendar.init(identifier: .gregorian) let components = NSDateComponents() components.hour = 7 components.minute = 0 var newDate = calendar?.date(from: components as DateComponents)! print(newDate!) However, this yields some bizarre results when I try to print or otherwise use the value. Here's a Swift Playground of the results: How can newDate be both 7:00AM and 11:56AM at the same time? 回答1: You didn't specify a time zone (by

问题 How can I get first and last days of the current week? What I need is some way of filtering a set of objects with NSDate property to leave only ones, that appear on current week, and then filter them by days. Also I need some way to get localized day names. I've tried to play with NSCalendar, NSDate and NSDateComponents, but it seems that I can't just check calendar's firstWeekday, as there might be weeks with days from previous/next month. 回答1: Use NSDateComponents to get the weekday, which