在iOS中将日期转换为时间戳

Question

如何将任何给定日期转换为毫秒？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]);

输出结果:1970/30/01

Answer 1

试一试吧."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]) ;

Answer 2

迅速

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

也可以看看

• 在Swift中将日期转换为整数
• 在Swift中创建日期和时间
• 如何获取当前时间作为日期时间