formatMoney function

String formatMoney(double num)

货币格式

Implementation

String formatMoney(double num) {
  /// 先保留两位小数
  String numStr = num.toStringAsFixed(2);
  String result = "";

  List list = numStr.split(".");
  String pre = list[0];
  String suf = list[1];

  if (pre.length <= 3) {
    return "$pre.$suf";
  }
  int pf = pre.length % 3;
  final int pff = pf;
  for (int i = 0; i < pre.length; i++) {
    result += pre[i];
    if (pf > 0) {
      pf--;
      if (pf == 0) {
        result += ",";
      }
    } else {
      if ((i - pff) % 3 == 2 && i != pre.length - 1) {
        result += ",";
      }
    }
  }

  result += ".$suf";

  return result;
}