// 创建日期格式
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat = @"yyyy-MM-dd HH:mm:ss";
// 结束时间
NSString *endDateStr = @"2014-06-24 00:00:00";
NSCalendar *calendar = [NSCalendar currentCalendar];
unsigned int unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;
NSDate *nowDate = [NSDate date];
NSDate *endDate = [dateFormatter dateFromString:endDateStr];
NSDateComponents *comps = [calendar components:unitFlags fromDate:nowDate toDate:endDate options:0];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat = @"yyyy-MM-dd HH:mm:ss";
// 结束时间
NSString *endDateStr = @"2014-06-24 00:00:00";
NSCalendar *calendar = [NSCalendar currentCalendar];
unsigned int unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;
NSDate *nowDate = [NSDate date];
NSDate *endDate = [dateFormatter dateFromString:endDateStr];
NSDateComponents *comps = [calendar components:unitFlags fromDate:nowDate toDate:endDate options:0];
NSLog(@"time-----%@",[NSString stringWithFormat:@"距离活动时间还有:%d年%d月%d天%d时%d分%d秒",comps.year,comps.month,comps.day,comps.hour,comps.minute,comps.second]);
NSDateFormatter * dateFormatter = [[NSDateFormatter alloc]init];
[dateFormatter setDateFormat:@"yy-MM-dd HH-mm-ss"];
NSDate * dateA = [dateFormatter dateFromString:@"2013-1-5 09-01-34"];
NSDate * dateB = [dateFormatter dateFromString:@"2014-1-5 08-47-24"];
NSTimeInterval timeInterval = [dateA timeIntervalSinceDate:dateB]; //这个是相隔的秒数,除以3600就是小时数,再除以24就是天数,一次类推
NSLog(@"%f",timeInterval/3600);