时间与时间戳的相互转换

   NSDate* date = [formatter dateFromString:timeStr]; //------------将字符串按formatter转成nsdate  

             

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

     

    NSString *nowtimeStr = [formatter stringFromDate:datenow];//----------将nsdate按formatter格式转成nsstring  

时间转时间戳的方法:  

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

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

 时间戳转时间的方法  

    NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:1296035591];  

    NSLog(@"1296035591  = %@",confromTimesp);        

    NSString *confromTimespStr = [formatter stringFromDate:confromTimesp];  

    NSLog(@"confromTimespStr =  %@",confromTimespStr);  

时间戳转时间的方法:  

NSDateFormatter* formatter = [[NSDateFormatter alloc] init];  

[formatter setDateStyle:NSDateFormatterMediumStyle];  

[formatter setTimeStyle:NSDateFormatterShortStyle];  

[formatter setDateFormat:@"yyyyMMddHHMMss"];  

NSDate *date = [formatter dateFromString:@"1283376197"];  

NSLog(@"date1:%@",date);  

      

时间戳转时间的方法: 

- (NSString *)timestampIntoTime:(NSNumber *)birthDay

{

    NSString *dateStr =
nil;

    if (birthDay && [[birthDay
stringValue] trim] !=
0)

    {

        NSTimeInterval timeInterval = [birthDay
longLongValue] / 1000;

        

        NSDateFormatter *formatter = [[NSDateFormatter
alloc]init];

        [formatter setDateFormat:@"yyyy-MM-dd"];

        NSTimeZone *localzone =  [NSTimeZone
timeZoneWithAbbreviation:@"GMT"];

        [formatter setTimeZone:localzone];

       

        NSDate *confromTimesp = [NSDate
dateWithTimeIntervalSince1970:timeInterval];

         FORMAT_LOG(@"confromTimesp==========%@",confromTimesp);

        dateStr = [formatter stringFromDate:confromTimesp];

        FORMAT_LOG(@"dateStr=======%@",dateStr);

    }

    return dateStr;

}