flutter 打印日志调试小工具

在flutter中打印的时候是没有文件行数显示的，不方便调试。此日志工具很方便使用，显示了文件信息、行数、打印信息。工具来源：红元老师

// 可以在utils定义log.dart
void printLog(Object message, StackTrace current) {
  MYCustomTrace programInfo = MYCustomTrace(current);
  print("文件: ${programInfo.fileName}, 行: ${programInfo.lineNumber}, 打印信息: $message");
}

class MYCustomTrace {
  final StackTrace _trace;
  String fileName;
  int lineNumber;
  int columnNumber;

  MYCustomTrace(this._trace) {
    _parseTrace();
  }

  void _parseTrace() {
    var traceString = this._trace.toString().split("\n")[0];
    var indexOfFileName = traceString.indexOf(RegExp(r'[A-Za-z_]+.dart'));
    var fileInfo = traceString.substring(indexOfFileName);
    var listOfInfos = fileInfo.split(":");
    this.fileName = listOfInfos[0];
    this.lineNumber = int.parse(listOfInfos[1]);
    var columnStr = listOfInfos[2];
    columnStr = columnStr.replaceFirst(")", "");
    this.columnNumber = int.parse(columnStr);
  }
}

使用:

    printLog('xxxxx', StackTrace.current);