Flutter 默认字体大小 [英] Flutter default font size

问题描述

我想为 Flutter 中的 Text 小部件设置默认字体大小.我知道我可以在主题中设置默认字体系列，但没有默认字体大小参数.

I want to have a default font size to the Text widget in Flutter. I know that I can set default font family in theme but there is no default font size parameter.

我只是想知道我的自定义小部件是实现得好还是我做错了方法?

I just wonder if my custom widget is implemented well or I did it wrong approach?

import 'package:flutter/material.dart';

/// Custom Text with a default font Monospace and a default font size.
class CustomText extends Text {
  /// Custom Text Constructor extend of Text constructor.
  CustomText(this.dataCustom,
      {this.styleCustom = const TextStyle(), this.textAlignCustom})
      : super(dataCustom,
            style: styleCustom.copyWith(fontFamily: 'Monospace', fontSize: 12),
            textAlign: textAlignCustom);

  /// The text to display.
  ///
  /// This will be null if a [textSpan] is provided instead.
  final String dataCustom;

  /// If non-null, the style to use for this text.
  ///
  /// If the style's "inherit" property is true, the style will be merged with
  /// the closest enclosing [DefaultTextStyle]. Otherwise, the style will
  /// replace the closest enclosing [DefaultTextStyle].
  final TextStyle styleCustom;

  /// How the text should be aligned horizontally.
  final TextAlign textAlignCustom;
}

谢谢

推荐答案

你应该 优先组合而不是继承.

class Mono12Text extends StatelessWidget {
  final String data;
  final TextAlign align;
  final TextStyle style;

  Mono12Text(
    this.data, {
    this.align,
    TextStyle style = const TextStyle(),
  }) : style = style.copyWith(
          fontFamily: 'Monospace',
          fontSize: 12,
        );

  @override
  Widget build(BuildContext context) {
    return Text(
      data,
      textAlign: align,
      style: style,
    );
  }
}

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