NSDate时间加减

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

   NSDate*nowDate = [NSDate date];
   NSTimeInterval  interval =24*60*60*1; //1:天数
    NSDate*date1 = [nowDate initWithTimeIntervalSinceNow:+interval];
   [dateFormattersetDateFormat:@"yyyy-MM-dd"];
   pLabDate.text  = [NSStringstringWithFormat:@"%@",[dateFormatter stringFromDate:date1]];