Я хотел бы найти общее количество дней между двумя датами.
например сегодня 01-01-2011 (ДД-ММ-ГГГГ), а вторая дата (25-03-2011), как мне найти общее количество дней?
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);
NSCalendar *Calander = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
NSDateComponents *comps = [[NSDateComponents alloc] init];
[dateFormat setDateFormat:@"dd"];
[comps setDay:[[dateFormat stringFromDate:[NSDate date]] intValue]];
[dateFormat setDateFormat:@"MM"];
[comps setMonth:[[dateFormat stringFromDate:[NSDate date]] intValue]];
[dateFormat setDateFormat:@"yyyy"];
[comps setYear:[[dateFormat stringFromDate:[NSDate date]] intValue]];
[dateFormat setDateFormat:@"HH"];
[comps setHour:05];
[dateFormat setDateFormat:@"mm"];
[comps setMinute:30];
NSDate *currentDate=[Calander dateFromComponents:comps];
NSLog(@"Current Date is :- '%@'",currentDate);
[dateFormat setDateFormat:@"dd"];
[comps setDay:[[dateFormat stringFromDate:yourDate] intValue]];
[dateFormat setDateFormat:@"MM"];
[comps setMonth:[[dateFormat stringFromDate:yourDate] intValue]];
[dateFormat setDateFormat:@"yyyy"];
[comps setYear:[[dateFormat stringFromDate:yourDate] intValue]];
[dateFormat setDateFormat:@"HH"];
[comps setHour:05];
[dateFormat setDateFormat:@"mm"];
[comps setMinute:30];
NSDate *reminderDate=[Calander dateFromComponents:comps];
//NSLog(@"Current Date is :- '%@'",reminderDate);
//NSLog(@"Current Date is :- '%@'",currentDate);
NSTimeInterval ti = [reminderDate timeIntervalSinceDate:currentDate];
//NSLog(@"Time Interval is :- '%f'",ti);
int days = ti/86400;
[dateFormat release];
[Calander release];
[comps release];
Надеюсь, это сработает для вас........
Более простой способ сделать это:
// This just sets up the two dates you want to compare
NSDateFormatter *formatter = [[[NSDateFormatter alloc] init] autorelease];
[formatter setDateFormat:@"dd-MM-yyyy"];
NSDate *startDate = [formatter dateFromString:@"01-01-2011"];
NSDate *endDate = [formatter dateFromString:@"25-03-2011"];
// This performs the difference calculation
unsigned flags = NSDayCalendarUnit;
NSDateComponents *difference = [[NSCalendar currentCalendar] components:flags fromDate:startDate toDate:endDate options:0];
// This just logs your output
NSLog(@"Start Date, %@", startDate);
NSLog(@"End Date, %@", endDate);
NSLog(@"%ld", [difference day]);
И результаты таковы:
Дата начала, 01.01.2011 00:00:00 +0000
Дата окончания, 25.03.2011 00:00:00 +0000
83
Попытка использовать секунды и манипулировать ими для расчета разницы во времени — плохая идея. Существует множество классов и методов, предоставляемых Cocoa для вычислений календаря, и вы должны использовать их как можно чаще.
Попробуй это
- (int) daysToDate:(NSDate*) endDate
{
//dates needed to be reset to represent only yyyy-mm-dd to get correct number of days between two days.
NSDateFormatter *temp = [[NSDateFormatter alloc] init];
[temp setDateFormat:@"yyyy-MM-dd"];
NSDate *stDt = [temp dateFromString:[temp stringFromDate:self]];
NSDate *endDt = [temp dateFromString:[temp stringFromDate:endDate]];
[temp release];
unsigned int unitFlags = NSMonthCalendarUnit | NSDayCalendarUnit;
NSCalendar *gregorian = [[NSCalendar alloc]
initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *comps = [gregorian components:unitFlags fromDate:stDt toDate:endDt options:0];
int days = [comps day];
[gregorian release];
return days;
}
//попробуй
if((![txtFromDate.text isEqualToString:@""]) && (![txtToDate.text isEqualToString:@""]))
{
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"MM/dd/yyyy"];
NSDate *startDate = [formatter dateFromString:txtFromDate.text];
NSDate *endDate = [formatter dateFromString:txtToDate.text];
unsigned flags = NSDayCalendarUnit;
NSDateComponents *difference = [[NSCalendar currentCalendar] components:flags fromDate:startDate toDate:endDate options:0];
int dayDiff = [difference day];
lblNoOfDays.text =[NSString stringWithFormat:@"%d",dayDiff];
}
чтобы найти количество дат между датой начала и датой окончания.
NSCalendar *cale=[[NSCalendar alloc]initWithCalendarIdentifier:NSGregorianCalendar];
unsigned unitFlags=NSMonthCalendarUnit| NSDayCalendarUnit;
NSDateComponents *comp1=[cale components:unitFlags fromDate:startDate toDate:endDate options:0];
NSInteger days=[comp1 day];
NSLog(@"Days %ld",(long)days);
Пожалуйста, попробуйте это. Надеюсь, это поможет вам...
NSDateFormatter *df=[[NSDateFormatter alloc] init];
// Set the date format according to your needs
[df setDateFormat:@"MM/dd/YYYY hh:mm a"]; //for 12 hour format
//[df setDateFormat:@"MM/dd/YYYY HH:mm "] // for 24 hour format
NSDate *date1 = [df dateFromString:firstDateString];
NSDate *date2 = [df dateFromString:secondDatestring];
NSLog(@"%@f is the time difference",[date2 timeIntervalSinceDate:date1]);
[df release];
