记录时间距离现在多久

//调用代码：
 NSString*dateStr = @"2014-11-10 13:00:13";
    NSDateFormatter* dateFormat = [[NSDateFormatteralloc]init];//实例化一个NSDateFormatter对象
    [dateFormat setDateFormat:@"yyyy-MM-dd HH:mm:ss"];//设定时间格式,要注意跟下面的dateString匹配，否则日起将无效
   
    NSDate *date =[dateFormatdateFromString:dateStr];
   
    NSString *sinceNowStr = [TimecompareCurrentTime:date];
    NSLog(@"sinceNowStr ====== %@",sinceNowStr);

//方法代码：
+(NSString*) compareCurrentTime:(NSDate*) compareDate
//
{
    NSTimeInterval  timeInterval = [compareDatetimeIntervalSinceNow];
    timeInterval = -timeInterval;
    long temp = 0;
    NSString *result;
    if (timeInterval < 60) {
        result = [NSStringstringWithFormat:@"刚刚"];
    }
    else if((temp = timeInterval/60) <60){
        result = [NSStringstringWithFormat:@"%ld分钟前",temp];
    }
   
    else if((temp = temp/60) <24){
        result = [NSStringstringWithFormat:@"%ld小时前",temp];
    }
   
    else if((temp = temp/24) <30){
        result = [NSStringstringWithFormat:@"%ld天前",temp];
    }
   
    else if((temp = temp/30) <12){
        result = [NSStringstringWithFormat:@"%ld月前",temp];
    }
    else{
        temp = temp/12;
        result = [NSStringstringWithFormat:@"%ld年前",temp];
    }
   
    return  result;
}