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IOS--方法积累

1.

计算两个日期之间相差几天几小时几分钟

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

   [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
   NSDate *  senddate=[NSDate date];
   //结束时间
   NSDate *endDate = [dateFormatter dateFromString:@"2014-6-24 00:00:00"];
   //当前时间
   NSDate *senderDate = [dateFormatter dateFromString:[dateFormatter stringFromDate:senddate]];
   //得到相差秒数
   NSTimeInterval time=[endDate timeIntervalSinceDate:senderDate];
    
   int days = ((int)time)/(3600*24);
   int hours = ((int)time)%(3600*24)/3600;
   int minute = ((int)time)%(3600*24)600/60;
   
   if (days <= 0&&hours; <= 0&&minute; <= 0)
       dateContent=@"0天0小时0分钟";
   else
       dateContent=[[NSString alloc] initWithFormat:@"%i天%i小时%i分钟",days,hours,minute];

IOS--方法积累