Flutter自定义裁剪路径插件custom_clippers的使用
Flutter自定义裁剪路径插件custom_clippers的使用
custom_clippers 是一个包含多种自定义裁剪器（clippers）的Flutter插件，可以用于创建具有独特形状的UI元素。通过将这些裁剪器应用到 ClipPath 小部件中，您可以轻松地实现各种视觉效果。
开始使用
添加依赖
在您的 pubspec.yaml 文件中添加 custom_clippers 作为依赖：
dependencies:
custom_clippers: ^1.0.0
然后执行 flutter pub get 来安装插件。
导入包
在需要使用裁剪器的地方导入 custom_clippers 包：
import 'package:custom_clippers/custom_clippers.dart';
使用示例
下面是一个完整的示例代码，展示了如何使用 custom_clippers 插件来创建不同的裁剪效果。我们将创建一个应用程序，其中包含多个不同类型的裁剪器。
示例代码
import 'package:custom_clippers/custom_clippers.dart';
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Custom Clippers Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: ClippersPage(title: 'Custom Clippers Demo'),
);
}
}
class ClippersPage extends StatefulWidget {
ClippersPage({Key? key, required this.title}) : super(key: key);
final String title;
@override
_ClippersPageState createState() => _ClippersPageState();
}
class _ClippersPageState extends State<ClippersPage> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text(widget.title)),
body: ListView(
padding: EdgeInsets.all(20),
physics: BouncingScrollPhysics(),
children: [
/// Multiple Points Clipper bottom only with height of points as 50
ClipPath(
clipper: MultiplePointsClipper(Sides.bottom, heightOfPoint: 50),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.red,
alignment: Alignment.center,
child: Text(
'Multiple Points Clipper Bottom Only',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Multiple Points Clipper vertical with number of points as 50
ClipPath(
clipper: MultiplePointsClipper(Sides.vertical, numberOfPoints: 50),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.green,
alignment: Alignment.center,
child: Text(
'Multiple Points Clipper Vertical',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Multiple Rounded Points Clipper bottom only with number of points as 30
ClipPath(
clipper: MultipleRoundedPointsClipper(Sides.bottom, numberOfPoints: 30),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.blue,
alignment: Alignment.center,
child: Text(
'Multiple Rounded Points Clipper Bottom Only',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Multiple Rounded Points Clipper vertical with height of points as 50
ClipPath(
clipper: MultipleRoundedPointsClipper(Sides.vertical, heightOfPoint: 50),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.yellow,
alignment: Alignment.center,
child: Text(
'Multiple Rounded Points Clipper Vertical',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Ticket Pass Clipper
ClipPath(
clipper: TicketPassClipper(),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.red,
alignment: Alignment.center,
child: Text(
'Ticket Pass Clipper',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Ticket Pass Clipper with position as 80 and hole radius as 40
ClipPath(
clipper: TicketPassClipper(position: 80, holeRadius: 40),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.green,
alignment: Alignment.center,
child: Text(
'Ticket Pass Clipper with Custom Position',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Directional Wave Clipper
ClipPath(
clipper: DirectionalWaveClipper(),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.blue,
alignment: Alignment.center,
child: Text(
'Directional Wave Clipper Bottom Left',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Directional Wave Clipper with vertical position as VerticalPosition.TOP
ClipPath(
clipper: DirectionalWaveClipper(verticalPosition: VerticalPosition.top),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.yellow,
alignment: Alignment.center,
child: Text(
'Directional Wave Clipper Top Left',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Directional Wave Clipper with horizontal position as HorizontalPosition.RIGHT
ClipPath(
clipper: DirectionalWaveClipper(horizontalPosition: HorizontalPosition.right),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.red,
alignment: Alignment.center,
child: Text(
'Directional Wave Clipper Bottom Right',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Directional Wave Clipper with vertical position as VerticalPosition.TOP and horizontal position as HorizontalPosition.RIGHT
ClipPath(
clipper: DirectionalWaveClipper(
verticalPosition: VerticalPosition.top,
horizontalPosition: HorizontalPosition.right),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.green,
alignment: Alignment.center,
child: Text(
'Directional Wave Clipper Top Right',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Sin Cosine Wave Clipper
ClipPath(
clipper: SinCosineWaveClipper(),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.blue,
alignment: Alignment.center,
child: Text(
'Sin Cosine Wave Clipper Bottom Left',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Sin Cosine Wave Clipper with vertical position as VerticalPosition.TOP
ClipPath(
clipper: SinCosineWaveClipper(verticalPosition: VerticalPosition.top),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.yellow,
alignment: Alignment.center,
child: Text(
'Sin Cosine Wave Clipper Top Left',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Sin Cosine Wave with horizontal position as HorizontalPosition.RIGHT
ClipPath(
clipper: SinCosineWaveClipper(horizontalPosition: HorizontalPosition.right),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.red,
alignment: Alignment.center,
child: Text(
'Sin Cosine Wave Clipper Bottom Right',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Sin Cosine Wave Clipper with vertical position as VerticalPosition.TOP and horizontal position as HorizontalPosition.RIGHT
ClipPath(
clipper: SinCosineWaveClipper(
verticalPosition: VerticalPosition.top,
horizontalPosition: HorizontalPosition.right),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.green,
alignment: Alignment.center,
child: Text(
'Sin Cosine Wave Clipper Top Right',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Three Rounded Edges Message Clipper Sender Side
ClipPath(
clipper: ThreeRoundedEdgesMessageClipper(MessageType.send),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.blue,
alignment: Alignment.center,
child: Text(
'Three Rounded Edges Message Clipper Sender',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Three Rounded Edges Message Clipper Receiver Side
ClipPath(
clipper: ThreeRoundedEdgesMessageClipper(MessageType.receive),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.yellow,
alignment: Alignment.center,
child: Text(
'Three Rounded Edges Message Clipper Receiver',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Diagonal Rounded Edges Message Clipper Sender Side
ClipPath(
clipper: DiagonalRoundedEdgesMessageClipper(MessageType.send),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.red,
alignment: Alignment.center,
child: Text(
'Diagonal Rounded Edges Message Clipper Sender',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Diagonal Rounded Edges Message Clipper Receiver Side
ClipPath(
clipper: DiagonalRoundedEdgesMessageClipper(MessageType.receive),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.green,
alignment: Alignment.center,
child: Text(
'Diagonal Rounded Edges Message Clipper Receiver',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Lower Nip Message Clipper Sender Side
ClipPath(
clipper: LowerNipMessageClipper(MessageType.send),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.blue,
alignment: Alignment.center,
child: Text(
'Lower Nip Message Clipper Sender',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Lower Nip Message Clipper Receiver Side
ClipPath(
clipper: LowerNipMessageClipper(MessageType.receive),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.yellow,
alignment: Alignment.center,
child: Text(
'Lower Nip Message Clipper Receiver',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Upper Nip Message Clipper Sender Side
ClipPath(
clipper: UpperNipMessageClipper(MessageType.send),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.red,
alignment: Alignment.center,
child: Text(
'Upper Nip Message Clipper Sender',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Upper Nip Message Clipper Receiver Side
ClipPath(
clipper: UpperNipMessageClipper(MessageType.receive),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.green,
alignment: Alignment.center,
child: Text(
'Upper Nip Message Clipper Receiver',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Upper Nip Message Clipper Two Sender Side
ClipPath(
clipper: UpperNipMessageClipperTwo(MessageType.send),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.blue,
alignment: Alignment.center,
child: Text(
'Upper Nip Message Clipper Two Sender',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
/// Upper Nip Message Clipper Two Receiver Side
ClipPath(
clipper: UpperNipMessageClipperTwo(MessageType.receive),
child: Container(
height: 160,
padding: EdgeInsets.all(20),
color: Colors.yellow,
alignment: Alignment.center,
child: Text(
'Upper Nip Message Clipper Two Receiver',
style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
),
),
),
SizedBox(height: 20),
],
),
);
}
}
输出效果
该示例代码将展示多种不同类型的裁剪效果，包括但不限于：
- 多点裁剪器（Multiple Points Clipper）
- 圆角多点裁剪器（Multiple Rounded Points Clipper）
- 票据裁剪器（Ticket Pass Clipper）
- 方向波浪裁剪器（Directional Wave Clipper）
- 正弦余弦波浪裁剪器（Sin Cosine Wave Clipper）
- 消息气泡裁剪器（Message Clipper）
每种裁剪器都提供了独特的视觉效果，适用于不同的UI设计需求。
支持的裁剪器
以下是 custom_clippers 插件支持的一些裁剪器及其效果图：
希望这个指南能帮助您更好地理解和使用 custom_clippers 插件。如果您有任何问题或需要进一步的帮助，请随时提问！
更多关于Flutter自定义裁剪路径插件custom_clippers的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
1 回复
更多关于Flutter自定义裁剪路径插件custom_clippers的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
当然，以下是如何在Flutter中使用custom_clippers插件来创建自定义裁剪路径的示例代码。首先，你需要确保在pubspec.yaml文件中添加了custom_clippers依赖项：
dependencies:
flutter:
sdk: flutter
custom_clippers: ^x.y.z # 替换为最新的版本号
然后，运行flutter pub get来安装依赖项。
以下是一个示例代码，展示如何使用custom_clippers来创建一个自定义裁剪路径的按钮：
import 'package:flutter/material.dart';
import 'package:custom_clippers/custom_clippers.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Custom Clippers Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(),
);
}
}
class MyHomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Custom Clippers Demo'),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
CustomClipperButton(
child: Text('Custom Clipper Button'),
clipper: DiamondClipper(),
),
SizedBox(height: 20),
CustomClipperButton(
child: Text('Star Clipper Button'),
clipper: StarClipper(),
),
],
),
),
);
}
}
class CustomClipperButton extends StatelessWidget {
final Widget child;
final CustomClipper<Rect> clipper;
CustomClipperButton({required this.child, required this.clipper});
@override
Widget build(BuildContext context) {
return ClipPath(
clipper: clipper,
child: Material(
color: Colors.blue,
elevation: 5.0,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10.0),
),
child: InkWell(
onTap: () {
print('Button tapped!');
},
child: Center(
child: child,
),
),
),
);
}
}
// 自定义钻石形状裁剪器
class DiamondClipper extends CustomClipper<Rect> {
@override
Rect getClip(Size size) {
double width = size.width;
double height = size.height;
double aspectRatio = width / height;
double halfWidth = width / 2.0;
double halfHeight = height / 2.0;
double diamondWidth = aspectRatio > 1 ? halfHeight * 2 : halfWidth * 2 / aspectRatio;
double diamondHeight = aspectRatio > 1 ? halfWidth * 2 * aspectRatio : halfHeight * 2;
double left = (width - diamondWidth) / 2.0;
double top = (height - diamondHeight) / 2.0;
Path path = Path();
path.moveTo(left + diamondWidth / 2.0, top);
path.lineTo(left, top + diamondHeight / 2.0);
path.lineTo(left + diamondWidth / 2.0, top + diamondHeight);
path.lineTo(left + diamondWidth, top + diamondHeight / 2.0);
path.close();
return path.getBounds();
}
@override
bool shouldReclip(CustomClipper<Rect> oldDelegate) => oldDelegate != this;
}
// 自定义星形裁剪器
class StarClipper extends CustomClipper<Rect> {
@override
Rect getClip(Size size) {
double width = size.width;
double height = size.height;
double radius = Math.min(width, height) / 2.0;
Path path = Path();
path.moveTo(radius, 0);
for (int i = 0; i < 5; i++) {
double angle = 2 * Math.pi / 5 * i + Math.pi / 2;
double outerX = radius + radius * 0.5 * Math.cos(angle - Math.pi / 5);
double outerY = radius + radius * 0.5 * Math.sin(angle - Math.pi / 5);
double innerX = radius + radius * 0.2 * Math.cos(angle);
double innerY = radius + radius * 0.2 * Math.sin(angle);
if (i == 0) {
path.moveTo(outerX, outerY);
} else {
path.lineTo(outerX, outerY);
}
path.lineTo(innerX, innerY);
}
path.close();
return path.getBounds();
}
@override
bool shouldReclip(CustomClipper<Rect> oldDelegate) => oldDelegate != this;
}
这个示例代码展示了如何使用custom_clippers来创建两个自定义裁剪按钮：一个是钻石形状，另一个是星形。你可以根据需要自定义裁剪路径以满足你的应用需求。请注意，这里的DiamondClipper和StarClipper只是示例，你可以根据具体需求进一步调整裁剪路径。
