flutter 去除RaisedButton、FlatButto

之前一直忙于开发， 也没有去读源码，这些按钮内置padding怎么也去除不掉，今儿读了下源码， so easy

按钮默认内置padding

             RaisedButton(
                child: Text('RaisedButton'),
                onPressed: () {},
              ),
              FlatButton(
                child: Text('Button', style: TextStyle(color: Colors.white)),
                color: Colors.pink,
                onPressed: () {},
              ),
              OutlineButton(
                child: Text('OutlineButton'),
                onPressed: () {},
              ),

那么怎么去除这写内置padding呢？只需要在main.dart文件中设置buttonTheme即可：

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Study',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
        buttonTheme: ButtonThemeData(
          minWidth: 0,
          height: 0,
          padding: EdgeInsets.zero, // 可以设置为zero,
          // padding: EdgeInsets.symmetric(
          //   // 也可以根据自己需要设置padding
          //   horizontal: 15,
          //   vertical: 8,
          // ),
        ),
      ),
      home: CYRoot(),
    );
  }
}

去除了内置padding
也可在代码中手动设置padding

 RaisedButton(
                padding: EdgeInsets.symmetric(horizontal: 10, vertical: 10),
                child: Text('RaisedButton'),
                onPressed: () {},
              ),

手动设置padding