我有一个跨越多年的时间间隔,我想所有的时间成分逐年下降到秒。
我首先想到的是为整数除以秒的时间间隔在一年内,减去从运行总计秒,除以一个月秒,减去从总的运行等。
这只是似乎令人费解,我读过,当你正在做的事情,看起来令人费解,有可能是一个内置的方法。
在那儿?
我综合亚历克斯的第二个方法为我的代码。
这是一个在我的界面的UIDatePicker调用的方法。
NSDate *now = [NSDate date];
NSDate *then = self.datePicker.date;
NSTimeInterval howLong = [now timeIntervalSinceDate:then];
NSDate *date = [NSDate dateWithTimeIntervalSince1970:howLong];
NSString *dateStr = [date description];
const char *dateStrPtr = [dateStr UTF8String];
int year, month, day, hour, minute, sec;
sscanf(dateStrPtr, "%d-%d-%d %d:%d:%d", &year, &month, &day, &hour, &minute, &sec);
year -= 1970;
NSLog(@"%d years\n%d months\n%d days\n%d hours\n%d minutes\n%d seconds", year, month, day, hour, minute, sec);
当我设置的日期选取器日期1年零1天过去,我得到:
1年1个月1天16小时0分钟20秒
其为1个月和16小时关闭。 如果我在过去设定的日期选择为1天,我过相同的量。
更新 :我有一个计算年你的年龄一个应用程序,给你的生日(设置从的UIDatePicker),但它往往是关闭。 这证明有一个不准确的,但我想不出来自何处,你能吗?
Answer 1:
简要描述;简介
只是另一种方法来完成JBRWilkinson的答案,但添加一些代码。 它也可以提供一个解决方案,亚历克斯·雷诺兹的评论。
使用NSCalendar方法:
创建2的NSDate要打破它的区别是NSTimeInterval。 (如果您NSTimeInterval来自比较2 NSDate的,你不需要做这一步,你甚至不需要的NSTimeInterval,只适用于该日期的NSCalendar方法)。
获得从NSDateComponents您的报价
示例代码
// The time interval
NSTimeInterval theTimeInterval = ...;
// Get the system calendar
NSCalendar *sysCalendar = [NSCalendar currentCalendar];
// Create the NSDates
NSDate *date1 = [[NSDate alloc] init];
NSDate *date2 = [[NSDate alloc] initWithTimeInterval:theTimeInterval sinceDate:date1];
// Get conversion to months, days, hours, minutes
NSCalendarUnit unitFlags = NSHourCalendarUnit | NSMinuteCalendarUnit | NSDayCalendarUnit | NSMonthCalendarUnit;
NSDateComponents *breakdownInfo = [sysCalendar components:unitFlags fromDate:date1 toDate:date2 options:0];
NSLog(@"Break down: %i min : %i hours : %i days : %i months", [breakdownInfo minute], [breakdownInfo hour], [breakdownInfo day], [breakdownInfo month]);
Answer 2:
此代码是知道的日光节约时间和其他可能讨厌的东西。
NSCalendar *gregorianCalendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [gregorianCalendar components: (NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit | NSDayCalendarUnit | NSMonthCalendarUnit | NSYearCalendarUnit )
fromDate:startDate
toDate:[NSDate date]
options:0];
NSLog(@"%ld", [components year]);
NSLog(@"%ld", [components month]);
NSLog(@"%ld", [components day]);
NSLog(@"%ld", [components hour]);
NSLog(@"%ld", [components minute]);
NSLog(@"%ld", [components second]);
Answer 3:
从iOS8上和上面你可以使用NSDateComponentsFormatter
它有方法,将用户友好的格式化字符串的时间差。
NSDateComponentsFormatter *formatter = [[NSDateComponentsFormatter alloc] init];
formatter.unitsStyle = NSDateComponentsFormatterUnitsStyleFull;
NSLog(@"%@", [formatter stringFromTimeInterval:1623452]);
这使输出 - 第2周,4天,18小时,57分钟,32秒
Answer 4:
将您的间隔划分为NSDate
使用+dateWithIntervalSince1970
,获取日期组件出,使用的NSCalendar
的-componentsFromDate
方法。
SDK参考
Answer 5:
这对我的作品:
float *lenghInSeconds = 2345.234513;
NSDate *date = [NSDate dateWithTimeIntervalSinceReferenceDate:lenghInSeconds];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0.0]];
[formatter setDateFormat:@"HH:mm:ss"];
NSLog(@"%@", [formatter stringFromDate:date]);
[formatter release];
这里的主要区别是,你需要调整的时区。
Answer 6:
还是有我的类方法。 它不处理多年,但很容易被addedn虽然它像天,小时和分钟小timelaps更好。 它以复数考虑,仅显示什么需要:
+(NSString *)TimeRemainingUntilDate:(NSDate *)date {
NSTimeInterval interval = [date timeIntervalSinceNow];
NSString * timeRemaining = nil;
if (interval > 0) {
div_t d = div(interval, 86400);
int day = d.quot;
div_t h = div(d.rem, 3600);
int hour = h.quot;
div_t m = div(h.rem, 60);
int min = m.quot;
NSString * nbday = nil;
if(day > 1)
nbday = @"days";
else if(day == 1)
nbday = @"day";
else
nbday = @"";
NSString * nbhour = nil;
if(hour > 1)
nbhour = @"hours";
else if (hour == 1)
nbhour = @"hour";
else
nbhour = @"";
NSString * nbmin = nil;
if(min > 1)
nbmin = @"mins";
else
nbmin = @"min";
timeRemaining = [NSString stringWithFormat:@"%@%@ %@%@ %@%@",day ? [NSNumber numberWithInt:day] : @"",nbday,hour ? [NSNumber numberWithInt:hour] : @"",nbhour,min ? [NSNumber numberWithInt:min] : @"00",nbmin];
}
else
timeRemaining = @"Over";
return timeRemaining;
}
Answer 7:
NSDate *date = [NSDate dateWithTimeIntervalSince1970:timeInterval];
// format: YYYY-MM-DD HH:MM:SS ±HHMM
NSString *dateStr = [date description];
NSRange range;
// year
range.location = 0;
range.length = 4;
NSString *yearStr = [dateStr substringWithRange:range];
int year = [yearStr intValue] - 1970;
// month
range.location = 5;
range.length = 2;
NSString *monthStr = [dateStr substringWithRange:range];
int month = [monthStr intValue];
// day, etc.
...
Answer 8:
这里的另一种可能性,有些清洁剂:
NSDate *date = [NSDate dateWithTimeIntervalSince1970:timeInterval];
NSString *dateStr = [date description];
const char *dateStrPtr = [dateStr UTF8String];
// format: YYYY-MM-DD HH:MM:SS ±HHMM
int year, month, day, hour, minutes, seconds;
sscanf(dateStrPtr, "%d-%d-%d %d:%d:%d", &year, &month, &day, &hour, &minutes, &seconds);
year -= 1970;
Answer 9:
- (NSString *)convertTimeFromSeconds:(NSString *)seconds {
// Return variable.
NSString *result = @"";
// Int variables for calculation.
int secs = [seconds intValue];
int tempHour = 0;
int tempMinute = 0;
int tempSecond = 0;
NSString *hour = @"";
NSString *minute = @"";
NSString *second = @"";
// Convert the seconds to hours, minutes and seconds.
tempHour = secs / 3600;
tempMinute = secs / 60 - tempHour * 60;
tempSecond = secs - (tempHour * 3600 + tempMinute * 60);
hour = [[NSNumber numberWithInt:tempHour] stringValue];
minute = [[NSNumber numberWithInt:tempMinute] stringValue];
second = [[NSNumber numberWithInt:tempSecond] stringValue];
// Make time look like 00:00:00 and not 0:0:0
if (tempHour < 10) {
hour = [@"0" stringByAppendingString:hour];
}
if (tempMinute < 10) {
minute = [@"0" stringByAppendingString:minute];
}
if (tempSecond < 10) {
second = [@"0" stringByAppendingString:second];
}
if (tempHour == 0) {
NSLog(@"Result of Time Conversion: %@:%@", minute, second);
result = [NSString stringWithFormat:@"%@:%@", minute, second];
} else {
NSLog(@"Result of Time Conversion: %@:%@:%@", hour, minute, second);
result = [NSString stringWithFormat:@"%@:%@:%@",hour, minute, second];
}
return result;
}
文章来源: How do I break down an NSTimeInterval into year, months, days, hours, minutes and seconds on iPhone?