flutter - 标题在flexibleSpaceBar上没有正确显示

Question

我正在尝试显示标题，但如您所见，它没有正确显示。

我尝试将 softWrap 设置为 true，但还是一样。

代码来自flutter contacts_demo gallery

flexibleSpace: FlexibleSpaceBar(
          title: const Text('Fantastic Beasts And Where To Find Them'),
            background: Stack(
               fit: StackFit.expand,
              children: <Widget>[
                Image.asset(
                  'people/ali_landscape.png',
                  package: 'flutter_gallery_assets',
                  fit: BoxFit.cover,
                  height: _appBarHeight,
                ),
                // This gradient ensures that the toolbar icons are distinct
                // against the background image.
                const DecoratedBox(
                  decoration: BoxDecoration(
                    gradient: LinearGradient(
                      begin: Alignment(0.0, -1.0),
                      end: Alignment(0.0, -0.4),
                      colors: <Color>[Color(0x60000000), Color(0x00000000)],
                    ),
                  ),
                ),
              ],
            ),
          ),

Answer 1

您可以将 ConstrainedBox 与 MediaQuery.of(context).size.width

一起使用

final mediaQuery = MediaQuery.of(context);

final availableWidth = mediaQuery.size.width - 160;

随着

title: ConstrainedBox(
    constraints: BoxConstraints(
        maxWidth: availableWidth,
    ),
    child: const Text('Fantastic Beasts And Where To Find Them'),
),