ios NSDate NSTring long 时间戳与字符串转换

一，转化的方法为

NSString *timeSp = [NSString stringWithFormat:@"%d", (long)[localeDate timeIntervalSince1970]];

NSLog(@"timeSp:%@",timeSp); //时间戳的值

二，把获取的时间转化为当前时间

NSDate *datenow = [NSDate date];//现在时间,你可以输出来看下是什么格式

NSTimeZone *zone = [NSTimeZone systemTimeZone];

NSInteger interval = [zone secondsFromGMTForDate:datenow];

NSDate *localeDate = [datenow dateByAddingTimeInterval: interval];

NSLog(@"%@", localeDate);

3.把时间戳转化为时间的方法

NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:1363948516];

NSLog(@"1363948516 = %@",confromTimesp);

//timer

NSDate *datenow = [NSDate date];//现在时间,你可以输出来看下是什么格式

NSTimeZone *zone = [NSTimeZone systemTimeZone];

NSInteger interval = [zone secondsFromGMTForDate:datenow];

NSDate *localeDate = [datenow dateByAddingTimeInterval: interval];

NSLog(@"%@", localeDate);

NSString *timeSp = [NSString stringWithFormat:@"%lld", (long long)[localeDate timeIntervalSince1970]];

NSLog(@"timeSp:%@",timeSp); //时间戳的值 1369189763711 1369218563 1369218614

NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:1369189763711/1000];

NSLog(@"1363948516 = %@",confromTimesp);

//实例化一个NSDateFormatter对象

//判断昨天 前几天等 判断今天凌晨时间戳

NSDateFormatter *dateFormatter1 = [[[NSDateFormatter alloc] init] autorelease];

[dateFormatter1 setDateFormat:@"yyyy-MM-dd 00:00:00"];

NSString *currentDateStr1 = [dateFormatter1 stringFromDate:[NSDate date]];

NSLog(@"凌晨时间:%@",currentDateStr1);

NSString *timeSp1 = [NSString stringWithFormat:@"%lld", (long long)[localeDate timeIntervalSince1970]];

NSLog(@"凌晨时间戳:%@",timeSp1);

//昨天凌晨时间戳

NSString *timeSp2 = [NSString stringWithFormat:@"%lld", (long long)[localeDate timeIntervalSince1970]-24*60*60];

NSLog(@"昨天凌晨时间戳:%@",timeSp2);