iOS开发计算距离现在时间

／／ 计算  距离现在的时间

-(NSString *)getUTCFormateDate:(NSString *)newDate

{

      //    newsDate = @"2016-01-19 09:01";

   NSDateFormatter *dateFormatter = [[NSDateFormatteralloc] init];

   [dateFormattersetDateFormat:@"yyyy-MM-dd HH:mm"];

   

   NSLog(@"newsDate = %@",newDate);

   NSDate *newsDateFormatted = [dateFormatter dateFromString:newsDate];

   NSTimeZone *timeZone = [NSTimeZonetimeZoneWithName:@"UTC"];

   [dateFormattersetTimeZone:timeZone];

    

   NSDate* current_date = [[NSDatealloc] init];

   NSTimeInterval time=[current_date timeIntervalSinceDate:newsDateFormatted];//间隔的秒数

   int month=((int)time)/(3600*24*30);

   int day=((int)time)/(3600*24);

   int hour=((int)time)%(3600*24)/3600;

   int minute=((int)time)%(3600*24)/60;

   NSLog(@"time=%d",(double)time);

    

   NSString *dateContent  = nil;

   if(month!=0){

         dateContent = [NSStringstringWithFormat:@"%@%i%@",@"   ",month,@"个月前"];

    }elseif(days!=0){

         dateContent = [NSStringstringWithFormat:@"%@%i%@",@"   ",days,@"天前"];

    }elseif(hours!=0){

           dateContent = [NSStringstringWithFormat:@"%@%i%@",@"  
",hours,@"小时前"];

    }elseif(minute !=0){

           dateContent = [NSStringstringWithFormat:@"%@%i%@",@"  
",minute,@"分钟前"];

        

    }else

    {

        dateContent =@"刚刚";

    }

   NSLog(@"dateContent %@",dateContent);

      return dateContent;

   }