时间戳转换为NSData

本来直接使用intervalSinceNow。但是的出来的data是有+0000的。所以加多了一个getLocalYYMMDD

#pragma mark -

#pragma mark time detail

- (NSString*)getLocalYYMMDD: (NSDate *)date

{

    NSDateFormatter *dateFormatter = [[NSDateFormatteralloc] init];

    dateFormatter.dateFormat = @"yyyy-MM-dd HH:mm:ss";

    [dateFormatter setTimeZone:[NSTimeZonelocalTimeZone]];

    NSString *localDateString = [dateFormatterstringFromDate:date];

    [dateFormatter release];

    return localDateString;

}

- (NSString *)intervalSinceNow: (NSString *) theDate

{

    NSDateFormatter *date=[[NSDateFormatteralloc] init];

    [date setDateFormat:@"yyyy-MM-dd HH:mm:ss"];

    NSDate *d=[date dateFromString:theDate];

    

    NSTimeInterval late=[dtimeIntervalSince1970]*1;

    NSDate* dat = [NSDatedateWithTimeIntervalSinceNow:0];

    NSTimeInterval now=[dattimeIntervalSince1970]*1;

    NSString *timeString=@"";

    NSTimeInterval cha=now-late;

    

    if (cha/60<1) {

        timeString = [NSString stringWithFormat:@"%f", cha];

        timeString = [timeString substringToIndex:timeString.length-7];

        timeString=[NSString stringWithFormat:@"%@秒前", timeString];

        

    }

    if (cha/60>1&&cha/3600<1) {

        timeString = [NSString stringWithFormat:@"%f", cha/60];

        timeString = [timeString substringToIndex:timeString.length-7];

        timeString=[NSString stringWithFormat:@"%@分钟前", timeString];

        

    }

    if (cha/3600>1&&cha/86400<1) {

        timeString = [NSString stringWithFormat:@"%f", cha/3600];

        timeString = [timeString substringToIndex:timeString.length-7];

        timeString=[NSString stringWithFormat:@"%@小时前", timeString];

    }

    

    if (cha/86400>1&&cha/2592000<1)

        

    {

        timeString = [NSString stringWithFormat:@"%f", cha/86400];

        timeString = [timeString substringToIndex:timeString.length-7];

        timeString=[NSString stringWithFormat:@"%@天前", timeString];

    }

    if (cha/2592000>1) {

        timeString = [NSString stringWithFormat:@"%f", cha/2592000];

        timeString = [timeString substringToIndex:timeString.length-7];

        timeString=[NSString stringWithFormat:@"%@月前", timeString];

    }

    

    [date release];

    return timeString;

}