Flutter Text内容居中显示

通过设置textAlign属性的值为TextAlign.center可以让Text的内容居中

class _MyHomePageState extends State {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Row(
        children: [
          Expanded(
              child: Text(
                'Hello World',
                textAlign: TextAlign.center,
              )
          )
        ],
      )// This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}

TextAlign是个枚举类型，源码如下，还支持设置文本位于左边、右边等

/// Whether and how to align text horizontally.
// The order of this enum must match the order of the values in RenderStyleConstants.h's ETextAlign.
enum TextAlign {
  /// Align the text on the left edge of the container.
  left,

  /// Align the text on the right edge of the container.
  right,

  /// Align the text in the center of the container.
  center,

  /// Stretch lines of text that end with a soft line break to fill the width of
  /// the container.
  ///
  /// Lines that end with hard line breaks are aligned towards the [start] edge.
  justify,

  /// Align the text on the leading edge of the container.
  ///
  /// For left-to-right text ([TextDirection.ltr]), this is the left edge.
  ///
  /// For right-to-left text ([TextDirection.rtl]), this is the right edge.
  start,

  /// Align the text on the trailing edge of the container.
  ///
  /// For left-to-right text ([TextDirection.ltr]), this is the right edge.
  ///
  /// For right-to-left text ([TextDirection.rtl]), this is the left edge.
  end,
}