nsdate

问题 I'm trying to get one month from the current date. Below is what I have and it is returning: 4027-09-24 16:59:00 +0000 . currentDate is right. What's going on? // Get todays date to set the monthly subscription expiration date NSDate *currentDate = [NSDate date]; NSLog(@"Current Date = %@", currentDate); NSDateComponents *dateComponents = [[NSCalendar currentCalendar] components:NSMonthCalendarUnit | NSDayCalendarUnit | NSYearCalendarUnit fromDate:currentDate]; dateComponents.month =

问题 I know this question is similar to others asked, but I can't find where my code is going wrong. I am trying to convert the current date into a mm/dd/yyyy format. Here is what I am using: NSDate *date = [[NSDate alloc]init]; NSDateFormatter *formatter = [[[NSDateFormatter alloc] init] autorelease]; [formatter setDateFormat:@"mm/dd/yyyy"]; NSLog(@"%@", [formatter stringFromDate:date]); The problem is the month. Every time I run this code, the month is different. For example the first time my

问题 Anyone know what the minimum and maximum possible values are for an NSDate? 回答1: Use [NSDate distantFuture] and [NSDate distantPast]. 回答2: EDITED Answer: I thought that I'd discovered the minimum date value was 0001-01-01 00:00:00 + 0000 (given my code below) HOWEVER as has been pointed out in the comments below, this is only for the current era (i.e. A.D.). An NSDate value can go lower than this but what you see as a result of an NSLog may not be what you are expecting, so I would recommend

问题 My class representing a person has a method to calculate that person's age: @interface Student : NSObject @property (strong) NSDate *dob; // This method will work out the person's age in calendar years - (NSDateComponents*)ageCalculation:(NSDate*)dob; Here is the class implementation file @implementation Student - (NSDateComponents*)ageCalculation:(NSDate*)dob { NSDate *now = [NSDate date]; NSCalendar *calendar = [NSCalendar currentCalendar]; NSCalendarUnit units = NSYearCalendarUnit |

问题 How do i get a date or metadata from a UIImage in this case: //UIImagePickerControllerSourceType picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; //delegate return - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{ // po info in console -> there is no metadata of the image where i can find the date // Has anyone an idea how to get it? } 回答1: If you are referring to EXIF metadata in the image (which includes

问题 If I have a date like 04-30-2006 how can I split and get month, day and year Alsois there any direct way of comparing the years ? 回答1: you have to use NSDateComponents. Like this: NSDate *date = [NSDate date]; NSUInteger componentFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit; NSDateComponents *components = [[NSCalendar currentCalendar] components:componentFlags fromDate:date]; NSInteger year = [components year]; NSInteger month = [components month]; NSInteger day =

问题 In my App if IPhone device time is in 12 hour formate then date formatter works correctly but if device time is in 24 hour formate then app crashed. let dateFormatter = NSDateFormatter(); dateFormatter.dateStyle = NSDateFormatterStyle.ShortStyle dateFormatter.timeStyle = NSDateFormatterStyle.NoStyle; dateFormatter.dateFormat = "hh:mm a"; var dt1 = dateFormatter.dateFromString(arrSecond.objectAtIndex(n) as! String) 回答1: @Rajan Thanks for giving me idea of NSLocale . I set the dateformatter's

问题 I am working with an API that returns a .NET DateTime object into my iOS application. I'm a little confused at what's going on, the DateTime looks fine when it leaves the API, but when it comes in it goes through JSON and comes in as a string that looks like this: /Date(1303884000000-0600)/ WTF is that and how can I turn it into a NSDate object?? Thanks! 回答1: From Parsing JSON dates on IPhone I found the following function to be perfect: - (NSDate*) getDateFromJSON:(NSString *)dateString { //

问题 I am working with an API that returns a .NET DateTime object into my iOS application. I'm a little confused at what's going on, the DateTime looks fine when it leaves the API, but when it comes in it goes through JSON and comes in as a string that looks like this: /Date(1303884000000-0600)/ WTF is that and how can I turn it into a NSDate object?? Thanks! 回答1: From Parsing JSON dates on IPhone I found the following function to be perfect: - (NSDate*) getDateFromJSON:(NSString *)dateString { //

问题 I would like to compare the current date with another date, and if that is date is earlier than the current date, then I should stop the next action. How can I do this? I have todays date in yyyy-MM-dd format. I need to check this condition if([displaydate text]<currentdate) { //stop next action } Here if displaydate is less than todays date then it has to enter that condition. 回答1: NSDate *today = [NSDate date]; // it will give you current date NSDate *newDate = [dateFormatter dateWithString