带有图标和文字的 Flutter 按钮看起来很奇怪

Question

我正在尝试创建一个 Flutter 应用程序，它有一个带有文本和图标作为标签的按钮，该图标位于文本的右侧。中描述的方法产生了一个看起来很奇怪的按钮，它似乎扩展到应用程序的宽度，请看这张图片（link 因为我不允许附加图片）：

Button becomes wide when adding a Row widget as child

我不清楚使用哪些布局小部件来调整文本+图像按钮以将其格式化为纯文本按钮。

生成上述例子的代码：

Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text(widget.title),
      ),
      body: new Center(
        child: new Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            new Text(
              'You have pushed the button this many times:',
            ),
            new Text(
              '$_counter',
              style: Theme.of(context).textTheme.display1,
            ),
            new RaisedButton(
              onPressed: _incrementCounter,
              child: new Row(
                children: <Widget>[
                  new Text("Button with text and icon!"),
                  new Icon(Icons.lightbulb_outline)
                ],
              ),
            ),
            new RaisedButton(
              onPressed: _incrementCounter,
              child: new Text("Button with only text")
              ),
          ],
        ),
      ),
      floatingActionButton: new FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: new Icon(Icons.add),
      ),
    );
  }
}

Answer 1

行属性 mainAxisSize: MainAxisSize.min 在这里发挥作用。

@override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text('Home'),
      ),
      body: new Center(
        child: new Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            new RaisedButton(
              onPressed: () {},
              child: new Row(
                mainAxisAlignment: MainAxisAlignment.center,
                mainAxisSize: MainAxisSize.min,
                children: <Widget>[
                  new Text('Button with text and icon!'),
                  new Icon(Icons.lightbulb_outline),
                ],
              ),
            ),
            new RaisedButton(
              onPressed: () {},
              child: new Text('Button with only text'),
            )
          ],
        ),
      ),
    );
  }

Answer 2

你可以简单地使用这个RaisedButton.icon

简单用法：

RaisedButton.icon(
   onPressed: () {},
   elevation: 2.0,
   shape: new RoundedRectangleBorder(
      borderRadius: new BorderRadius.circular(5.0),
   ),
   color: const Color(0xFFFFB822),
   icon: Icon(Icons.add_shopping_cart),
   label: Text("Add to Cart",
             style: TextStyle(
             fontWeight: FontWeight.w900,
    ),
  ),
)

Answer 3

非常简单易行...

ElevatedButton(
                style: ElevatedButton.styleFrom(
                    primary: Colors.green, elevation: 2),
                onPressed: () {},
                child: Row(
                  children: [
                    Icon(Icons.edit_outlined),
                    SizedBox(
                      width: 10.0,
                    ),
                    Text('Edit'),
                  ],
                ),
              ),

您可以随意更改图标或文字颜色。希望对您有所帮助。

带有图标和文字的 Flutter 按钮看起来很奇怪

Flutter button with icon and text looks odd

flutter

flutter-layout