在 iOS 中将日期转换为时间戳
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Convert date to timestamp in iOS
提问by user2799156
How do you convert any given date to milliseconds? For example, 2014-01-23 to timestamp conversion.
你如何将任何给定的日期转换为毫秒？例如，2014-01-23 到时间戳转换。
NSDate *date = [dateFormatter dateFromString:@"2014-01-23"];
NSLog(@"date=%@",date);
NSTimeInterval interval = [date timeIntervalSince1970];
NSLog(@"interval=%f",interval);
NSDate *methodStart = [NSDate dateWithTimeIntervalSince1970:interval];
[dateFormatter setDateFormat:@"yyyy/mm/dd "];
NSLog(@"result: %@", [dateFormatter stringFromDate:methodStart]);
Output result: 1970/30/01
输出结果：1970/30/01
回答by Suragch
Swift
迅速
Convert the current date/time to a timestamp:
将当前日期/时间转换为时间戳：
// current date and time
let someDate = Date()
// time interval since 1970
let myTimeStamp = someDate.timeIntervalSince1970
See also
也可以看看
回答by KudoCC
Have it a try. "mm" stands for minute while "MM" stands for month.
试一试。“mm”代表分钟，而“MM”代表月份。
NSDateFormatter * dateFormatter = [[NSDateFormatter alloc] init] ;
[dateFormatter setDateFormat:@"yyyy-MM-dd"] ;
NSDate *date = [dateFormatter dateFromString:@"2014-01-23"] ;
NSLog(@"date=%@",date) ;
NSTimeInterval interval = [date timeIntervalSince1970] ;
NSLog(@"interval=%f",interval) ;
NSDate *methodStart = [NSDate dateWithTimeIntervalSince1970:interval] ;
[dateFormatter setDateFormat:@"yyyy/MM/dd "] ;
NSLog(@"result: %@", [dateFormatter stringFromDate:methodStart]) ;
回答by Alex Brown
NSTimeinterval is really a double, being seconds since a particular date (in your case, the start of 1970)
NSTimeinterval 确实是一个双倍，是自特定日期以来的秒数（在您的情况下，是 1970 年的开始）
回答by Xeieshan
[date1 timeIntervalSinceDate:date2]will return seconds from two NSDate objects.
[date1 timeIntervalSinceDate:date2]将从两个 NSDate 对象返回秒。
double seconds = [date1 timeIntervalSinceDate:date2];
double milliSecondsPartOfCurrentSecond = seconds - [seconds intValue];
milliSecondsPartOfCurrentSecond
毫秒部分当前秒
回答by Vicky
NOTE :- UNIX Timestamp format contains 13 Digits so we need a 1000 multiplication with the result. And the timestamp must be UTC ZONE not our local Time Zone.
注意：- UNIX 时间戳格式包含 13 位数字，因此我们需要与结果相乘 1000。并且时间戳必须是 UTC ZONE 而不是我们当地的时区。
- (void)GetCurrentTimeStamp
{
NSDateFormatter *objDateformat = [[NSDateFormatter alloc] init];
[objDateformat setDateFormat:@"yyyy-MM-dd"];
NSString *strUTCTime = [self GetUTCDateTimeFromLocalTime:@"2014-01-23"];
NSDate *objUTCDate = [objDateformat dateFromString:strUTCTime];
long long milliseconds = (long long)([objUTCDate timeIntervalSince1970] * 1000.0);
NSLog(@"Local Time = %@---- UTC = %@ ----- TimeSatmp = %ld ---- TimeStamp = %lld",strTime,strUTCTime,unixTime,milliseconds);
}
- (NSString *) GetUTCDateTimeFromLocalTime:(NSString *)IN_strLocalTime
{
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd"];
NSDate *objDate = [dateFormatter dateFromString:IN_strLocalTime];
[dateFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"UTC"]];
NSString *strDateTime = [dateFormatter stringFromDate:objDate];
return strDateTime;
}
