Flutter 颤振-如何以条状显示标记文字

我试图在SliverList中运行Markdown小部件（包：flatter_Markdown 0.2.0），但我遇到了一些问题

理想情况下，我希望在小条中的ExpandTile小部件中执行Markdown小部件，但现在我只想解决小条的Markdown子项问题

我发布的代码给了我一些问题：

• 我正确地看到了降价文本，但应用程序被冻结（我不能滚动，我什么也做不了）。当我使用widget MarkdownBody时，我有这种行为

• 我在使用小部件标记时看到一条错误消息：

这是我的示例的完整代码：

import 'package:flutter/material.dart';
import 'package:flutter_markdown/flutter_markdown.dart';

const String _markdownData = """# Markdown Example
Markdown allows you to easily include formatted text, images, and even formatted Dart code in your app.

## Styling
Style text as _italic_, __bold__, or `inline code`.

- Use bulleted lists
- To better clarify
- Your points

## Links
You can use [hyperlinks](hyperlink) in markdown

## Images

You can include images:

![Flutter logo](https://flutter.io/images/flutter-mark-square-100.png#100x100)

## Markdown widget

This is an example of how to create your own Markdown widget:

    new Markdown(data: 'Hello _world_!');

## Code blocks
Formatted Dart code looks really pretty too:

void main() {
  runApp(new MaterialApp(
    home: new Scaffold(
      body: new Markdown(data: markdownData)
    )
  ));
}

Enjoy!
""";

void main() {
  runApp(MaterialApp(
      title: "Markdown Demo",
      home: Scaffold(
          appBar: AppBar(title: const Text('Markdown Demo')),
          body: Container(
              child: CustomScrollView(slivers: <Widget>[
            SliverList(
              delegate:
                  SliverChildListDelegate([Markdown(data: _markdownData)]),
            )
          ])))));
}

---

图像不存在，这将冻结应用程序。

仅当我在容器小部件中设置height属性时，使用SliverToBoxAdapter而不是SliverList

才有效：

void main（）{widget\u buildSliverToBoxAdapter（）{返回SliverToBoxAdapter（子对象：容器（高度：400.0，子对象：Markdown）（数据：\ markdownData）），；}runApp（MaterialApp（标题：“降价演示”，主页：Scaffold（正文：CustomScrollView（片段：[[u buildSliverToBoxAdapter（），]）））；}

这是一个问题，因为标记文本的长度是动态的。请在SliverFill中尝试SliveToboxAdapter

import 'package:flutter/material.dart';
import 'package:flutter_markdown/flutter_markdown.dart';

const String _markdownData = """# Markdown Example
Markdown allows you to easily include formatted text, images, and even formatted Dart code in your app.

## Styling
Style text as _italic_, __bold__, or `inline code`.

- Use bulleted lists
- To better clarify
- Your points

## Links
You can use [hyperlinks](hyperlink) in markdown

## Images

You can include images:

![Flutter logo](https://flutter.io/images/flutter-mark-square-100.png#100x100)

## Markdown widget

This is an example of how to create your own Markdown widget:

    new Markdown(data: 'Hello _world_!');

## Code blocks
Formatted Dart code looks really pretty too:

void main() {
  runApp(new MaterialApp(
    home: new Scaffold(
      body: new Markdown(data: markdownData)
    )
  ));
}

Enjoy!
""";

void main() {
  runApp(MaterialApp(
      title: "Markdown Demo",
      home: Scaffold(
          appBar: AppBar(title: const Text('Markdown Demo')),
          body: Container(
              child: CustomScrollView(slivers: <Widget>[
            SliverList(
              delegate:
                  SliverChildListDelegate([Markdown(data: _markdownData)]),
            )
          ])))));
}

![Flutter logo](https://flutter.io/images/flutter-mark-square-100.png#100x100)