受限制的Box控件
const BoxConstraints({
this.minWidth = 0.0,
this.maxWidth = double.infinity,
this.minHeight = 0.0,
this.maxHeight = double.infinity,
});
class ConstrainedBoxWidget extends StatelessWidget {
@override
Widget build(BuildContext context) {
return _myWidget;
}
get _myWidget {
return ConstrainedBox(
constraints: BoxConstraints(
minHeight: 30,
minWidth: 30,
maxHeight: 150,
maxWidth: 150
),
child: Container(
width: 200,
height: 150,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(20),
gradient: LinearGradient(
colors: [Colors.blue, Colors.purple],
)
)
)
);
}
}
原文：https://www.cnblogs.com/wjw334/p/12567816.html