nsdate

问题 I tried something like this: var calendar = Calendar.current var dayFutureComponents = DateComponents() dayFutureComponents.day = 1 // aka 1 day var d = calendar.date(byAdding: dayFutureComponents, to: Date()) ...//setting of d.hour, d.minute, d.second to zero and finding the difference between 2 dates The problem is for example my current GMT is +3 . So the result differs from one I need to achieve by 3 hours. How to fix this issue? 回答1: First create a Calendar for the UTC timezone. Second

问题 I only want date like "29-10-2014" with no time so i did this NSDateFormatter *df = [[NSDateFormatter alloc]init]; [df setDateFormat:@"dd-MM-yyyy"]; NSString *sDate = [df stringFromDate:date]; If I log the sDate I am getting perfect result. But I dont want NSString I want date object, to do that here what I did is NSDate *theDate = [df dateFromString:sDate]; Now I am getting 2014-10-29 19:00:00 +0000 I only want 29-10-2014 . 回答1: This is because -[NSDate description] returns you full

问题 I'm using Stig Brautaset's JSON framework serialize some objects, including NSDates (which are not directly supported). I decided to use NSDate's description as the JSONFragment representation of a date (I don't care about the minor loss of precision incurred in doing so). To extend Stig Brautaset's JSON framework to include NSDates, I defined a category: @interface NSDate (NSDate_JSON) <JSONInitializer> -(NSString *) JSONFragment; @end To recreate an NSDate (and other classes) from JSON, I

问题 First I display a UIDatePicker on the screen and allow the user to choose a date and time. I save that value like this, which gets a date format that looks like this: 6/1/16, 1:47 PM let time = NSDateFormatter.localizedStringFromDate(datePicker.date, dateStyle: .ShortStyle, timeStyle: .ShortStyle) Later on in the application, I want users to be able to edit their original date, so when a button is pressed, I would like the UIDatePicker to display the time that they had originally chosen. I am

问题 I have the following function which i am using to calculate a start and end of todays date. It was working perfectly last week, i think it may have something to do with the clocks going forwards? func rangeOfPeriod(period: NSCalendarUnit, date: NSDate) -> (NSDate, NSDate) { let calendar = NSCalendar.currentCalendar() var startDate: NSDate? = nil var duration: NSTimeInterval = 0 calendar.rangeOfUnit(period, startDate: &startDate, interval: &duration, forDate: date) let endDate = startDate!

问题 In my app I have a UITableView which will be fill with core date items. As you can see in this post, I have already asked for a sorting function: https://stackoverflow.com/a/36703648/6012187 func ReSort() { CoreDataItems.sortInPlace({sortAscending ? $0.RowName < $1.RowName : $0.RowName > $1.RowName}) sortAscending = !sortAscending tableView.reloadData() } Now my question is, how can I set dynamically the RowName Value? for example. I save the the RowName in the user defaults. but $0.defaults

问题 Imagine the current local time being 15:11 UTC. I retrieve a data set from the server showing the opening closing time of a business displayed like so: { close = { day = 3; time = 0200; }; open = { day = 2; time = 1700; }; I also receive a utc-offset property exposed like so: "utc_offset" = "-420”; which I imagine is a minute offset giving an hour offset of 7 hours which seems right considering the timezone I'm in is UTC and the business location's opening hours information I'm receiving is

问题 Imagine the current local time being 15:11 UTC. I retrieve a data set from the server showing the opening closing time of a business displayed like so: { close = { day = 3; time = 0200; }; open = { day = 2; time = 1700; }; I also receive a utc-offset property exposed like so: "utc_offset" = "-420”; which I imagine is a minute offset giving an hour offset of 7 hours which seems right considering the timezone I'm in is UTC and the business location's opening hours information I'm receiving is

问题 I am using core data to store objects for my project.There is a date field in the object .I want to check against the clicked date of the Tapku calendar component for iphone. The date on my object is in the format 2011-01-10 and it is a localized date . How can i check the date against the date returned from the tapku calendar control. 回答1: Yes you can, here is what I did to make it work: on the method: (NSArray*)calendarMonthView:(TKCalendarMonthView *)monthView marksFromDate:(NSDate *

问题 In My application I have to complete a particular task in given time.So first i calculated the time complete the task in seconds and then add that time to the current that like this. NSDate *mydate = [NSDate date]; NSTimeInterval TotalDuraionInSec = sec.cal_time * 60; TaskCmpltTime = [mydate addTimeInterval:TotalDuraionInSec]; NSLog(@"task will be completed at%@",TaskCmpltTime); now I compare time like this if([CurrentTime isEqualToDate:AfterCmpltTime]){ NSLog (@"Time Finish"); } but I want