Flutter 颤振-我绘制的剪切路径看起来是相反的
我想在设计中剪裁此路径: 但代码是这样工作的: 当我从网上看到的源代码中复制代码时,我也会遇到同样的问题 我怎样才能解决这个问题Flutter 颤振-我绘制的剪切路径看起来是相反的,flutter,path,curve,clipping,Flutter,Path,Curve,Clipping,我想在设计中剪裁此路径: 但代码是这样工作的: 当我从网上看到的源代码中复制代码时,我也会遇到同样的问题 我怎样才能解决这个问题 谢谢。尝试输入反向属性为true的列表视图。尝试输入反向属性为true的列表视图。您可以复制下面的粘贴运行完整代码 对于屏幕,起点(0,0)是屏幕的左上角 您可以首先移动到path.moveTo(0,size.height)并开始绘图 您可以参考 代码片段 class CurvePainter extends CustomPainter { @override
谢谢。尝试输入反向属性为true的列表视图。尝试输入反向属性为true的列表视图。您可以复制下面的粘贴运行完整代码
对于屏幕,起点(0,0)是屏幕的左上角
您可以首先移动到
path.moveTo(0,size.height)编码>并开始绘图
您可以参考
代码片段
class CurvePainter extends CustomPainter {
@override
void paint(Canvas canvas, Size size) {
Paint paint = new Paint()..color = Colors.pink;
// create a path
Path path = Path();
path.moveTo(0, size.height);
path.lineTo(0, size.height * 0.6);
/*path.quadraticBezierTo(
size.height, size.height * 0.10, size.width, size.width * 0.5);*/
path.quadraticBezierTo(
size.width / 3, size.height * 0.45, size.width, size.height * 0.45);
path.lineTo(size.width, size.height);
canvas.drawPath(path, paint);
}
工作演示
完整代码
import 'package:flutter/material.dart';
void main() {
WidgetsFlutterBinding.ensureInitialized();
runApp(MyApp());
}
class CurvePainter extends CustomPainter {
@override
void paint(Canvas canvas, Size size) {
Paint paint = new Paint()..color = Colors.pink;
// create a path
Path path = Path();
path.moveTo(0, size.height);
path.lineTo(0, size.height * 0.6);
/*path.quadraticBezierTo(
size.height, size.height * 0.10, size.width, size.width * 0.5);*/
path.quadraticBezierTo(
size.width / 3, size.height * 0.45, size.width, size.height * 0.45);
path.lineTo(size.width, size.height);
canvas.drawPath(path, paint);
}
@override
bool shouldRepaint(CustomPainter oldDelegate) => true;
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Container(
child: CustomPaint(
painter: CurvePainter(),
child: Container(
child: Center(
child: Padding(
padding: const EdgeInsets.only(top: 120.0),
child: Text("TEST"),
)),
),
),
),
),
);
}
}
导入“包装:颤振/材料.省道”;
void main(){
WidgetsFlutterBinding.ensureInitialized();
runApp(MyApp());
}
类CurvePainter扩展了CustomPainter{
@凌驾
空心油漆(帆布,尺寸){
油漆=新油漆()…颜色=颜色。粉红色;
//创建路径
路径=路径();
路径.移动到(0,大小.高度);
path.lineTo(0,size.height*0.6);
/*path.quadraticBezierTo(
尺寸.高度,尺寸.高度*0.10,尺寸.宽度,尺寸.宽度*0.5)*/
path.quadraticBezierTo(
尺寸.宽度/3,尺寸.高度*0.45,尺寸.宽度,尺寸.高度*0.45);
path.lineTo(大小.宽度,大小.高度);
画布.绘制路径(路径,绘制);
}
@凌驾
bool shouldRepaint(CustomPainter oldDelegate)=>true;
}
类MyApp扩展了无状态小部件{
@凌驾
小部件构建(构建上下文){
返回材料PP(
标题:“颤振演示”,
主题:主题数据(
主样本:颜色。蓝色,
视觉密度:视觉密度。自适应平台密度,
),
主页:MyHomePage(标题:“颤振演示主页”),
);
}
}
类MyHomePage扩展StatefulWidget{
MyHomePage({Key,this.title}):超级(Key:Key);
最后的字符串标题;
@凌驾
_MyHomePageState createState()=>\u MyHomePageState();
}
类_MyHomePageState扩展状态{
@凌驾
小部件构建(构建上下文){
返回脚手架(
正文:中(
子:容器(
孩子:定制油漆(
画家:CurvePainter(),
子:容器(
儿童:中心(
孩子:填充(
填充:仅限常量边集(顶部:120.0),
子项:文本(“测试”),
)),
),
),
),
),
);
}
}
您可以复制粘贴运行下面的完整代码
对于屏幕,起点(0,0)是屏幕的左上角
您可以首先移动到path.moveTo(0,size.height)编码>并开始绘图
您可以参考
代码片段
class CurvePainter extends CustomPainter {
@override
void paint(Canvas canvas, Size size) {
Paint paint = new Paint()..color = Colors.pink;
// create a path
Path path = Path();
path.moveTo(0, size.height);
path.lineTo(0, size.height * 0.6);
/*path.quadraticBezierTo(
size.height, size.height * 0.10, size.width, size.width * 0.5);*/
path.quadraticBezierTo(
size.width / 3, size.height * 0.45, size.width, size.height * 0.45);
path.lineTo(size.width, size.height);
canvas.drawPath(path, paint);
}
工作演示
完整代码
import 'package:flutter/material.dart';
void main() {
WidgetsFlutterBinding.ensureInitialized();
runApp(MyApp());
}
class CurvePainter extends CustomPainter {
@override
void paint(Canvas canvas, Size size) {
Paint paint = new Paint()..color = Colors.pink;
// create a path
Path path = Path();
path.moveTo(0, size.height);
path.lineTo(0, size.height * 0.6);
/*path.quadraticBezierTo(
size.height, size.height * 0.10, size.width, size.width * 0.5);*/
path.quadraticBezierTo(
size.width / 3, size.height * 0.45, size.width, size.height * 0.45);
path.lineTo(size.width, size.height);
canvas.drawPath(path, paint);
}
@override
bool shouldRepaint(CustomPainter oldDelegate) => true;
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Container(
child: CustomPaint(
painter: CurvePainter(),
child: Container(
child: Center(
child: Padding(
padding: const EdgeInsets.only(top: 120.0),
child: Text("TEST"),
)),
),
),
),
),
);
}
}
导入“包装:颤振/材料.省道”;
void main(){
WidgetsFlutterBinding.ensureInitialized();
runApp(MyApp());
}
类CurvePainter扩展了CustomPainter{
@凌驾
空心油漆(帆布,尺寸){
油漆=新油漆()…颜色=颜色。粉红色;
//创建路径
路径=路径();
路径.移动到(0,大小.高度);
path.lineTo(0,size.height*0.6);
/*path.quadraticBezierTo(
尺寸.高度,尺寸.高度*0.10,尺寸.宽度,尺寸.宽度*0.5)*/
path.quadraticBezierTo(
尺寸.宽度/3,尺寸.高度*0.45,尺寸.宽度,尺寸.高度*0.45);
path.lineTo(大小.宽度,大小.高度);
画布.绘制路径(路径,绘制);
}
@凌驾
bool shouldRepaint(CustomPainter oldDelegate)=>true;
}
类MyApp扩展了无状态小部件{
@凌驾
小部件构建(构建上下文){
返回材料PP(
标题:“颤振演示”,
主题:主题数据(
主样本:颜色。蓝色,
视觉密度:视觉密度。自适应平台密度,
),
主页:MyHomePage(标题:“颤振演示主页”),
);
}
}
类MyHomePage扩展StatefulWidget{
MyHomePage({Key,this.title}):超级(Key:Key);
最后的字符串标题;
@凌驾
_MyHomePageState createState()=>\u MyHomePageState();
}
类_MyHomePageState扩展状态{
@凌驾
小部件构建(构建上下文){
返回脚手架(
正文:中(
子:容器(
孩子:定制油漆(
画家:CurvePainter(),
子:容器(
儿童:中心(
孩子:填充(
填充:仅限常量边集(顶部:120.0),
子项:文本(“测试”),
)),
),
),
),
),
);
}
}
是的,这也是一个解决方案,但很复杂是的,这也是一个解决方案,但复杂度对我来说很有效。非常感谢。多亏了这段代码,我在4个屏幕上画出了不同的图案。这对我很有用。非常感谢。多亏了这段代码,我在4个屏幕上画的不同。