53 lines
1.6 KiB
Dart
53 lines
1.6 KiB
Dart
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class SkyTimeTool {
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static String getTimeZone() {
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final offset = DateTime.now().timeZoneOffset;
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final hours = offset.inHours;
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final minutes = offset.inMinutes.remainder(60).abs();
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final sign = hours >= 0 ? '+' : '-';
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final formatted =
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'GMT$sign${hours.abs().toString().padLeft(2, '0')}:${minutes.toString().padLeft(2, '0')}';
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return formatted;
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}
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//格式化数字，带单位 k / m，可自定义小数位和千分位分隔符
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static String formatNum(
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num value, {
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int decimalDigits = 1,
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String separator = ',',
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}) {
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String removeTrailingZeros(String str) {
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if (str.contains('.')) {
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str = str.replaceAll(RegExp(r'0+$'), ''); // 去掉末尾 0
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str = str.replaceAll(RegExp(r'\.$'), ''); // 去掉末尾小数点
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}
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return str;
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}
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String addSeparator(String str) {
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final parts = str.split('.');
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final intPart = parts[0];
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final decPart = parts.length > 1 ? '.${parts[1]}' : '';
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final regex = RegExp(r'(\d+)(\d{3})');
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var formatted = intPart;
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while (regex.hasMatch(formatted)) {
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formatted = formatted.replaceAllMapped(
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regex,
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(m) => '${m[1]}$separator${m[2]}',
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);
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}
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return '$formatted$decPart';
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}
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if (value < 1000) {
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return addSeparator(value.toStringAsFixed(0));
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} else if (value < 1000000) {
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final formatted = (value / 1000).toStringAsFixed(decimalDigits);
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return '${removeTrailingZeros(formatted)}K';
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} else {
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final formatted = (value / 1000000).toStringAsFixed(decimalDigits);
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return '${removeTrailingZeros(formatted)}M';
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}
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}
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} |