Flutter TextButton 填充

Question

随着 Flutter 2.0 版本的发布，FlatButton 已被 TextButton 取代。

因此，填充属性不再直接可用，而是作为 ButtonStyle 属性.

我的问题是，由于 EdgeInsets 不再可用，我该如何设置它？

TextButton(
   style: new ButtonStyle(
     padding: ???,
   ),
   //padding: const EdgeInsets.all(0),   //NOT AVAILABLE
   child: Text("Support", style: Theme.of(context).textTheme.headline2),
      onPressed: () => {Navigator.pushNamed(context, SupportScreen().routeName)},
   ),

Answer 1

你可以这样做，例如：

TextButton(
              onPressed: () {},
              child: Text('Hello World'),
              style: TextButton.styleFrom(
                padding: EdgeInsets.fromLTRB(10, 10, 10, 10),
                primary: Colors.teal,
              ),
            ),

TextButton.styleFrom() 参考文档： https://api.flutter.dev/flutter/material/TextButton-class.html

使用新按钮的示例和解决方法： https://www.woolha.com/tutorials/flutter-using-textbutton-widget-examples

Answer 2

您可以为 MaterialStates 设置不同的值：

class TextButtonPadding extends StatelessWidget {
  EdgeInsets _getPadding(Set<MaterialState> states) {
    const interactiveStates = <MaterialState>{
      MaterialState.pressed,
      MaterialState.hovered,
    };
    if (states.any(interactiveStates.contains)) {
      return EdgeInsets.all(30.0);
    }
    return EdgeInsets.zero;
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        child: TextButton(
          style: ButtonStyle(
            padding: MaterialStateProperty.resolveWith(_getPadding),
          ),
          onPressed: () {},
          child: Text(
            'Text Button',
          ),
        ),
      ),
    );
  }
}

或为所有 MaterialStates 设置一个值：

class TextButtonPadding extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        child: TextButton(
          style: ButtonStyle(
            padding: MaterialStateProperty.all(
              EdgeInsets.all(30.0),
            ),
          ),
          onPressed: () {},
          child: Text(
            'Text Button',
          ),
        ),
      ),
    );
  }
}

请看https://api.flutter.dev/flutter/material/MaterialStateProperty-class.html

Answer 3

这是我的 TextButton 代码

Container(
    child: TextButton(
    style: ButtonStyle(
        backgroundColor:
            MaterialStateProperty.all<Color>(Colors.green),
        padding: MaterialStateProperty.all<EdgeInsets>(
            EdgeInsets.all(10)),
    ),
    child: Text(
        "Login",
        style: TextStyle(
        height: 1.0,
        fontSize: 30,
        color: Colors.white,
        ),
    ),
    onPressed: () => {print("login")},
    ),  
),

看到我为 TextButton 小部件使用了样式属性来插入填充和背景对于两者，我都使用 MaterialStateProperty.all

Flutter TextButton 填充

Flutter TextButton padding

dart

flutter

flutter-2