如何在 Flutter 中创建一个带有圆角的模态 bottomsheet？

Question

showModalBottomSheet 不提供任何样式或装饰。我想创建类似 Google 任务底页的内容。

Answer 1

这是所需的 modalBottomSheet 函数。

    void _modalBottomSheetMenu(){
        showModalBottomSheet(
            context: context,
            builder: (builder){
              return new Container(
                height: 350.0,
                color: Colors.transparent, //could change this to Color(0xFF737373), 
                           //so you don't have to change MaterialApp canvasColor
                child: new Container(
                    decoration: new BoxDecoration(
                        color: Colors.white,
                        borderRadius: new BorderRadius.only(
                            topLeft: const Radius.circular(10.0),
                            topRight: const Radius.circular(10.0))),
                    child: new Center(
                      child: new Text("This is a modal sheet"),
                    )),
              );
            }
        );
      }

此外，这项工作最重要的部分是，在 MaterialApp 中将 canvasColor 设置为透明，如下所示。

return new MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Tasks',
      theme: new ThemeData(
        primarySwatch: Colors.teal,
        canvasColor: Colors.transparent,
      ),
      home: new TasksHomePage(),
    );
  }

我已经测试了代码并且它工作正常，因为我也在制作 Google Tasks 应用程序的克隆，它将在我的 github.

中开源

Answer 2

更新于 2019-08-05

您现在可以使用默认的 showModalBottomSheet 方法完成此操作，该方法现在支持添加 ShapeBorder 和 backgroundColor!

showModalBottomSheet(
  shape: RoundedRectangleBorder(
     borderRadius: BorderRadius.circular(10.0),
  ),
  backgroundColor: Colors.white,
  ...
);

--

我决定查看 showModalBottomSheet 的实现并找出问题所在，而不是像其他答案所建议的那样覆盖应用程序的整个主题（这导致我的应用程序的各个部分出现问题）我。事实证明，所需要的只是将模态的主要代码包装在包含 canvasColor: Colors.transparent 技巧的 Theme 小部件中。我还让自定义半径和模态本身的颜色变得更容易。

您可以使用包含相同代码的 package on pub or a gist。不要忘记导入正确的 package/file.

showRoundedModalBottomSheet(
    context: context,
    radius: 20.0,  // This is the default
    color: Colors.white,  // Also default
    builder: (context) => ???,
);

Answer 3

您现在可以简单地设置 shape 参数。示例：

showModalBottomSheet(
  shape: RoundedRectangleBorder(
    borderRadius: BorderRadius.all(Radius.circular(10.0)),
  ),
  context: context,
  builder: (context) => MyBottomSheet(),
);

Answer 4

将之前的所有答案放在一起，我可以得到最好的结果（在我看来）。

showModalBottomSheet(
        context: context,
        backgroundColor: Colors.white,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.only(topLeft: Radius.circular(15.0), topRight: Radius.circular(15.0)),
        ),
        builder: (context) {
          return Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            mainAxisSize: MainAxisSize.min,
            children: <Widget>[     
              ListTile(
                leading: Icon(Icons.email),
                title: Text('Send email'),
                onTap: () {
                  print('Send email');
                },
              ),
              ListTile(
                leading: Icon(Icons.phone),
                title: Text('Call phone'),
                 onTap: () {
                    print('Call phone');
                  },
               ),                  
            ],
          );
        });

Answer 5

    showModalBottomSheet(
     backgroundColor: Colors.transparent,
     context: context,
     builder: (ctx) {
      return Container( 
      decoration: BoxDecoration(
      color: Colors.green, // or some other color
      borderRadius: BorderRadius.only(
      topLeft: Radius.circular(10.0),
      topRight: Radius.circular(10.0)
       ) 
     );
    });

Answer 6

刚刚回答了一个相关问题

您可以为您的bottomSheet添加角点，并根据其中的内容扩展您的bottomSheet （不限于屏幕的一半大小）

查看答案here

Answer 7

我认为制作圆角模态框的最佳方法是使用带有垂直 BorderRadius 的 RoundedRectangleBorder，仅设置其 top 属性:

showModalBottomSheet(
        context: context,
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.vertical(top: Radius.circular(25.0)),
        ),
        builder: (BuildContext context) {
          // return your layout
        });

对左上角和右上角使用单独的半径有点冗长且容易出错。

Answer 8

我有这段代码，对我来说效果很好。请检查并告诉我你的意见。

showBottomSheet(
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.vertical(
              top: Radius.circular(20),
            ),
          ),
          context: context,
          builder: (context) => Container(
                height: 250,

                child: new Container(
                    decoration: new BoxDecoration(
                        color: Theme.of(context).primaryColor,
                        borderRadius: new BorderRadius.only(
                            topLeft: const Radius.circular(20.0),
                            topRight: const Radius.circular(20.0))),
                    child: new Center(
                      child: new Text("This is a modal sheet"),
                    )),
              ))

Answer 9

showModalBottomSheet(
context:context
shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(
          top: Radius.circular(20),
        ),
      ),
      clipBehavior: Clip.antiAliasWithSaveLayer,
)

Answer 10

您可以在 showModalBottomSheet:

中添加一个 RoundedRectangleBorder 小部件

showModalBottomSheet<void>(
    shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.only(
            topLeft: Radius.circular(10.0),
            topRight: Radius.circular(10.0)
        ),
    ),
)

Answer 11

也可以在装饰容器中赋予borderRadius

 showModalBottomSheet(
                context: context,
                builder: (builder){
                  return  Container(
                        decoration: BoxDecoration(
                            color: Colors.white,
                            borderRadius: BorderRadius.only(
                                topLeft: const Radius.circular(15.0),
                                topRight: const Radius.circular(15.0))),
                        child: Center(
                          child: Text("This is a modal sheet"),
                        ),
                  );
                }
            );

Answer 12

对于持久底部 sheet，在 material 应用小部件的主题中添加以下代码属性

ThemeData(          
          bottomSheetTheme: BottomSheetThemeData(
            shape: RoundedRectangleBorder(
              borderRadius: BorderRadius.circular(10.0),
            ),
          ),
        ),

Answer 13

showModalBottomSheet(
  context:context
  shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(
          top: Radius.circular(20),
        ),
      ),
  clipBehavior: Clip.hardEdge,
)

使用Clip.hardEdge会好很多。因为它比其他剪辑模式快但比 [none].

慢

Answer 14

showModalBottomSheet(
    isScrollControlled: true,
    backgroundColor: colorOnPrimary,
    // set this when inner content overflows, making RoundedRectangleBorder not working as expected
    clipBehavior: Clip.antiAlias,
    // set shape to make top corners rounded
    shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.only(
            topLeft: Radius.circular(16), 
            topRight: Radius.circular(16),
        ),
    ),
    context: context,
    builder: (context) {
        return SingleChildScrollView(
            child: Container(),
        );
    },
)

Answer 15

一种方法是使用showModalBottomSheet shape 属性,

showModalBottomSheet(
  context:context
  shape: const RoundedRectangleBorder(
    borderRadius: BorderRadius.only(
      topLeft: Radius.circular(10.0),
      topRight: Radius.circular(10.0),
    ),
  ),
)

如何在 Flutter 中创建一个带有圆角的模态 bottomsheet？

How to create a modal bottomsheet with circular corners in Flutter?

flutter

flutter-layout

更新于 2019-08-05

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