nsdate

问题 I have a client server model where server will send some data which has date parameters and iPhone will need to render it. Server and iPhone will resides in different timezones. So I need to synchronize times in both. Let say user has done some activity at "07/18/2011/04 /45/EDT" (server time). From the iPhone end I need to convert this date string into a NSDate object. What is the best way to achieve this. Thank you 回答1: Sorry for the late response, just looked for "NSDate Sync to Server" on

问题 Why doesn't it return NSDate* ? It's supposed to be a creation function right? All creation function return the class whose type is the class creating it. Now, I can't do NSDate.date.timeIntervalSince1970 :( I thought the compiler is smart enough to know that NSDate.date return NSDate even though the return type is id? 回答1: UPDATE Starting from iOS 7, Apple is using instancetype as return type for most of the Foundation framework APIs (and other frameworks too), so now for instance the +date

问题 is there a way to get calendarweek of an NSDate according ISO 8601. I think: Datecomponents *dateComponents = [cal components:(NSWeekOfYearCalendarUnit ) fromDate: testDate ]; int calandarWeek = [dateComponents weekOfYear]; uses a different algorithm. ISO definition: CW1 is the first week in the year containing 4 day, CW start on Mondays 回答1: I found out. It´s possible to configure the NSCalender: [cal setFirstWeekday:2]; //week starts on Monday [cal setMinimumDaysInFirstWeek:4]; //first week

问题 Scenario: I have an expense tracking iOS Application and I am storing expenses from a expense detail view controller into a table view (with fetched results controller) that shows the list of expenses along with the category and amount and date. I do have a date attribute in my entity "Money" which is a parent entity for either an expense or an income. Question: What I want is to basically categorize my expenses for a given week, a month, or year and display it as the section header title for

问题 I've been searching this and couldn't quite find it. I have an object in a NSDictionary that contains a NSDate. Now standard NSDate objects are pretty long. and I want to show the user in dd-MMM format. For eg: The original date may be 2012-04-23 00:00:00 +0000 , for which I want the date to appear as 23 Apr I tried using NSDateComponents and NSDateFormatter but it didn't quite work. Probably I'm not figuring out the correct usage FOR the required format. Here's the code for better

问题 Really simple one, I am sure this is a bug in swift. I am trying to check if 2 NSDates are the same. This statement never passes even thought the printout is below println("\(statistics.startDate) \(healthObject.date)") if healthObject.date.isEqualToDate(statistics.startDate) { healthObject.flights = Int(quantity.doubleValueForUnit(HKUnit.countUnit())) println(Int(quantity.doubleValueForUnit(HKUnit.countUnit()))) } 2015-03-30 13:56:50 +0000 2015-03-30 13:56:50 +0000 2015-03-30 13:56:50 +0000

问题 I have a NSMutableArray with dictionaries, all of the dict's contain a NSDate is form of NSString with key 'Date'. I want to sort the NSDictionaries by the Dates. So for example i have the following state of the array: Dict Date 20.06.1996 23:30 Dict Date 04.10.2011 19:00 Dict Date 20.06.1956 23:39 And I want to sort it, so that it looks like this: Dict Date 20.06.1956 23:39 Dict Date 20.06.1996 23:30 Dict Date 04.10.2011 19:00 I have already experimented with NSSortDescriptor, but without

问题 I'm having trouble here. Took me hours but no use. Please keep in mind I checked the heck of StackOverFlow for a fix but there isn't any. When I convert the _date Object from Gregorian to Hijri it does not convert. I know that because when I print it it still gives me the Gregorian day. This troubles me because I want to setDate of a UIDatePicker and it's setting it incorrectly because the _date is gregorian and my UIDatePicker object calendar set to setCalendar:_hijriCalendar //DATE SETTING

问题 This question already has an answer here : Is there any way to get the tamper-proof date and time on iPhone? (1 answer) Closed 5 years ago . So, I'm developing an app that is based on the time, but with NSDate an user can easily hack the application by changing system time of the device. So I might want to use a better method for retrieving time. How can I do this? Is there an easy way to retrieve time from internet? 回答1: Checkout this Google Library: https://github.com/jbenet/ios-ntp After

问题 In MyappAppDelegate.m file at "application: didFinishLaunchingWithOptions:" method, I just wrote: NSDateFormatter *df = [[NSDateFormatter alloc] init]; [df setDateFormat:@"yyyy"]; NSDate *date = [NSDate date]; NSLog(@"%@", [df stringFromDate:date]); return; And ran with iPhoneSimulator, console said: 2010-10-15 20:38:43.571 Myapp[59828:207] 0022 I can't understand what's happening. So I created new Xcode project and tested like above, then it correctly returned '2010'. Did I do some bad