flutter - 如何在 Flutter 中的新 OutlinedButton 小部件上实现圆角？

Question

在 Flutter 1.22 中，我们收到了一个新的小部件 OutlinedButton用来代替OutlineButton但是我们如何才能真正使它的边框变圆？ borderSide和 shape属性不再可用。

Answer 1

您可以使用 OutlinedButton.styleFrom属性(property):

OutlinedButton(
   style: OutlinedButton.styleFrom(
      shape: RoundedRectangleBorder(
         borderRadius: BorderRadius.circular(18.0),
      ),
      side: BorderSide(width: 2, color: Colors.green),
   ),
   onPressed: () {},
   child: Text('Button'),
)

从源代码

 /// All parameters default to null, by default this method returns
 /// a [ButtonStyle] that doesn't override anything.
 ///
 /// For example, to override the default shape and outline for an
 /// [OutlinedButton], one could write:
 ///
 /// ```dart
 /// OutlinedButton(
 ///   style: OutlinedButton.styleFrom(
 ///      shape: StadiumBorder(),
 ///      side: BorderSide(width: 2, color: Colors.green),
 ///   ),
 /// )
 /// ```