iOS时间格式化“刚刚、几分钟前、几小时前”等，[包括时间戳&格式化后的时间]

前言：
iOS中把时间转化成“刚刚、几分钟前、几小时前、几天前、某月某日几点几分、.......”格式
这就需要看后台返回什么样的类型了，在项目中碰到的无非就是，格式化后和时间戳了。所以，这次把这两种我都结合起来，放到这里，直接拿去用！

一、返回格式化后的时间 2016-10-11 12:33:33

pragma mark 时间格式转化

注意：数据返回类型为格式化后的时间 eg: "2016-10-11 12:33:33"

• (NSString *) compareCurrentTime:(NSString *)str
  {

  //把字符串转为NSdate
  NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
  [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
  NSDate *timeDate = [dateFormatter dateFromString:str];

  //得到与当前时间差
  NSTimeInterval timeInterval = [timeDate timeIntervalSinceNow];
  timeInterval = -timeInterval;
  //标准时间和北京时间差8个小时
  // timeInterval = timeInterval - 86060;
  long temp = 0;
  NSString *result;
  if (timeInterval < 60) {
  result = [NSString stringWithFormat:@"刚刚"];
  }
  else if((temp = timeInterval/60) <60){
  result = [NSString stringWithFormat:@"%ld分钟前",temp];
  }

else if((temp = temp/60) <24){
    result = [NSString stringWithFormat:@"%ld小时前",temp];
}

else if((temp = temp/24) <30){
    result = [NSString stringWithFormat:@"%ld天前",temp];
}

else if((temp = temp/30) <12){
    result = [NSString stringWithFormat:@"%ld月前",temp];
}
else{
    temp = temp/12;
    result = [NSString stringWithFormat:@"%ld年前",temp];
}

return  result;

}

二、返回的是时间戳

pragma mark 时间格式转化

注意：后台返回的时间戳包括10位或者有小数点。
eg：“1480064761” 1480064761.000000

• (NSString *)distanceTimeWithBeforeTime:(double)beTime
  {
  NSTimeInterval now = [[NSDate date]timeIntervalSince1970];
  double distanceTime = now - beTime;
  NSString * distanceStr;

  NSDate * beDate = [NSDate dateWithTimeIntervalSince1970:beTime];
  NSDateFormatter * df = [[NSDateFormatter alloc]init];
  [df setDateFormat:@"HH:mm"];
  NSString * timeStr = [df stringFromDate:beDate];

  [df setDateFormat:@"dd"];
  NSString * nowDay = [df stringFromDate:[NSDate date]];
  NSString * lastDay = [df stringFromDate:beDate];

  if (distanceTime < 60) {
  distanceStr = @"刚刚";
  }
  else if (distanceTime <6060) {
  distanceStr = [NSString stringWithFormat:@"%ld分钟前",(long)distanceTime/60];
  }
  else if(distanceTime <246060 && [nowDay integerValue] == [lastDay integerValue]){
  distanceStr = [NSString stringWithFormat:@"今天 %@",timeStr];
  }
  else if(distanceTime<2460602 && [nowDay integerValue] != [lastDay integerValue]){

    if ([nowDay integerValue] - [lastDay integerValue] ==1 || ([lastDay integerValue] - [nowDay integerValue] > 10 && [nowDay integerValue] == 1)) {
        distanceStr = [NSString stringWithFormat:@"昨天 %@",timeStr];
    }
    else{
        [df setDateFormat:@"MM-dd HH:mm"];
        distanceStr = [df stringFromDate:beDate];
    }
  

  }
  else if(distanceTime <246060*365){
  [df setDateFormat:@"MM-dd HH:mm"];
  distanceStr = [df stringFromDate:beDate];
  }
  else{
  [df setDateFormat:@"yyyy-MM-dd HH:mm"];
  distanceStr = [df stringFromDate:beDate];
  }
  return distanceStr;
  }

三、捎带福利、获取当前时间戳方法，返回10位。

pragma mark 获取当前时间戳

• (NSString *)getCurrentTime{
  NSDate *senddata = [NSDate date];
  NSString *date2 = [NSString stringWithFormat:@"%ld", (long)[senddata timeIntervalSince1970]];
  return date2;
  }