flutter - 如何设计一个自动在 flutter 中自动换行的Text Widget？

Question

我想设计一个自动换行的文本小部件，当文本长度超过最大长度时，它将使用省略号。

以下代码可以达到类似的效果。

Container(
  color: Colors.red,
  child: Text(
    'DENTIFICATIONDENTIFICATIONDENTIFICATIONDENTIFICATIONDENTIFICATIONDENTIFICATIONDENTIFICATIONDENTIFICATIONDENTIFICATIONDENTIFICATIONDENTIFICATIONDENTIFICATIONDENTIFICATIONDENTIFICATIONDENTIFICATIONDENTIFICATIONDENTIFICATIONDENTIFICATIONDENTIFICATIONDENTIFICATION',
    overflow: TextOverflow.ellipsis,
    maxLines: 6,
  ),
),

但是它必须指定 maxLines，我不需要这个，我需要小部件根据父对象的大小自动设置 maxLines。

如何改善代码？

Answer 1

您可以尝试以下方法:

@override
Widget build(BuildContext context) {
  String longText = "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum";
  double size = 100, fontSize = 16; 

  return Scaffold(
    appBar: AppBar(),
    body: Padding(
      padding: const EdgeInsets.all(20.0),
      child: SizedBox(
        height: size,
        child: Text(
          longText,
          style: TextStyle(fontSize: fontSize, height: 1),
          overflow: TextOverflow.ellipsis,
          maxLines: size ~/ fontSize,
        ),
      ),
    ),
  );
}

输出: