format static method

Implementation

static String format(int millisecondsSinceEpoch, {bool dayOnly = true}) {
  // 当天日期
  DateTime nowDate = DateTime.now();
  // 传入日期
  DateTime targetData =
      DateTime.fromMillisecondsSinceEpoch(millisecondsSinceEpoch);
  String prefix = "";
  // 是否当年
  if (nowDate.year != targetData.year) {
    prefix = DateFormat('yyyy年M月d日').format(targetData);
  } else if (nowDate.month != targetData.month) {
    // 同一年 不同月份
    prefix = DateFormat('M月d日').format(targetData);
  } else if (nowDate.day != targetData.day) {
    //同一月 不同天
    if (nowDate.day - targetData.day == 1) {
      prefix = '昨天';
    } else {
      prefix = DateFormat('M月d日').format(targetData);
    }
  }
  if (prefix.isNotEmpty && dayOnly) {
    return prefix;
  }
  int targetHour = targetData.hour;
  String returnTime = "", suffix = DateFormat('h:mm').format(targetData);
  if (targetHour >= 0 && targetHour < 6) {
    returnTime = '凌晨';
  } else if (targetHour >= 6 && targetHour < 8) {
    returnTime = '早晨';
  } else if (targetHour >= 8 && targetHour < 11) {
    returnTime = '上午';
  } else if (targetHour >= 11 && targetHour < 13) {
    returnTime = '中午';
  } else if (targetHour >= 13 && targetHour < 18) {
    returnTime = '下午';
  } else if (targetHour >= 18 && targetHour <= 23) {
    returnTime = '晚上';
  }
  if (prefix.isEmpty) {
    return '$returnTime$suffix';
  } else {
    return '$prefix $returnTime$suffix';
  }
}