我是 Flutter 开发的初学者。我正在尝试使用 border-radius 组件创建一个弯曲的小部件,但我无法创建一个精确的模型屏幕。请指导我如何绘制弯曲的小部件。在这里我附上了我的模型样本。
提前致谢。
最佳答案
这是一个示例,您可以如何使用 CustomClipper
class ClippingApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: ClipPath(
clipper: CurvedBottomClipper(),
child: Container(
color: Colors.lightGreen,
height: 250.0,
child: Center(
child: Padding(
padding: EdgeInsets.only(bottom: 50),
child: Text(
"Curved View",
style: TextStyle(
fontSize: 25,
color: Colors.white,
),
),
)),
),
),
);
}
}
class CurvedBottomClipper extends CustomClipper<Path> {
@override
Path getClip(Size size) {
// I've taken approximate height of curved part of view
// Change it if you have exact spec for it
final roundingHeight = size.height * 3 / 5;
// this is top part of path, rectangle without any rounding
final filledRectangle =
Rect.fromLTRB(0, 0, size.width, size.height - roundingHeight);
// this is rectangle that will be used to draw arc
// arc is drawn from center of this rectangle, so it's height has to be twice roundingHeight
// also I made it to go 5 units out of screen on left and right, so curve will have some incline there
final roundingRectangle = Rect.fromLTRB(
-5, size.height - roundingHeight * 2, size.width + 5, size.height);
final path = Path();
path.addRect(filledRectangle);
// so as I wrote before: arc is drawn from center of roundingRectangle
// 2nd and 3rd arguments are angles from center to arc start and end points
// 4th argument is set to true to move path to rectangle center, so we don't have to move it manually
path.arcTo(roundingRectangle, pi, -pi, true);
path.close();
return path;
}
@override
bool shouldReclip(CustomClipper<Path> oldClipper) {
// returning fixed 'true' value here for simplicity, it's not the part of actual question, please read docs if you want to dig into it
// basically that means that clipping will be redrawn on any changes
return true;
}
}
关于flutter - 如何在不使用 border-radius 的情况下创建弯曲的小部件,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/57197298/