查找iphone中两个日期之间的总天数 [英] find total number of days between two dates in iphone

问题描述

我想查找两个日期之间的总天数。

I would like to find total number of days between two dates.

例如。今天是01-01-2011（DD-MM-YYYY），第二个日期是（25-03-2011），我如何找到总天数？

e.g. today is 01-01-2011(DD-MM-YYYY) and second date is (25-03-2011), how would I find the total number of days?

NSDate *currentdate=[NSDate date];
NSLog(@"curretdate is ==%@",currentdate);
NSDateFormatter *tempFormatter1 = [[[NSDateFormatter alloc]init]autorelease];
[tempFormatter1 setDateFormat:@"dd-mm-YYYY hh:mm:ss"];
NSDate *toDate = [tempFormatter1 dateFromString:@"20-04-2011 09:00:00"];

NSLog(@"toDate ==%@",toDate);

推荐答案

在你的约会格式中你设置错误了是dd-MM-yyyy HH：mm：ss。可能是那个问题..你得到错误的日期而没有得到答案我发送litte位代码获得一天的差异。

In your date Format tor u set wrong it`s be dd-MM-yyyy HH:mm:ss . may be that was the problem.. u get wrong date and not get answer i send litte bit code for get day diffrence.

  NSDateFormatter *tempFormatter = [[[NSDateFormatter alloc]init]autorelease];
 [tempFormatter setDateFormat:@"dd-MM-yyyy HH:mm:ss"];
  NSDate *startdate = [tempFormatter dateFromString:@"15-01-2011 09:00:00"];
  NSLog(@"startdate ==%@",startdate);

  NSDateFormatter *tempFormatter1 = [[[NSDateFormatter alloc]init]autorelease];
  [tempFormatter1 setDateFormat:@"dd-MM-yyyy HH:mm:ss"];
  NSDate *toDate = [tempFormatter1 dateFromString:@"20-01-2011 09:00:00"];
  NSLog(@"toDate ==%@",toDate);

   int i = [startdate timeIntervalSince1970];
   int j = [toDate timeIntervalSince1970];

   double X = j-i;

   int days=(int)((double)X/(3600.0*24.00));
   NSLog(@"Total Days Between::%d",days);

---

编辑1：

我们可以使用以下函数找到日期差异：

we can find date difference using following function :

-(int)dateDiffrenceFromDate:(NSString *)date1 second:(NSString *)date2 {
    // Manage Date Formation same for both dates
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"dd-MM-yyyy"];
    NSDate *startDate = [formatter dateFromString:date1];
    NSDate *endDate = [formatter dateFromString:date2];


    unsigned flags = NSDayCalendarUnit;
    NSDateComponents *difference = [[NSCalendar currentCalendar] components:flags fromDate:startDate toDate:endDate options:0];

    int dayDiff = [difference day];

    return dayDiff;
}

查找更多有关NSDateComponent的信息 here。

from Abizern`s ans. find more infromation for NSDateComponent here.

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