地区选择和罗盘十字

lib/components/cross_paint.dart

@@ -0,0 +1,35 @@
+import 'package:flutter/material.dart';
+
+class CrossPaint extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      color: Colors.transparent,
+      alignment: Alignment.center,
+      child: CustomPaint(
+        // 使用CustomPaint 背景画板
+        painter: MyPainter(),
+      ),
+    );
+  }
+}
+
+class MyPainter extends CustomPainter {
+  @override
+  void paint(Canvas canvas, Size size) {
+    // 创建画笔
+    final Paint paintLine = Paint()
+      ..color = Colors.grey
+      ..strokeWidth = 2;
+    // 绘制线
+    canvas.drawLine(Offset(-400, 0), Offset(400, 0), paintLine);
+    canvas.drawLine(Offset(0, 500), Offset(0, -440), paintLine);
+    // 创建画笔
+    // final Paint paintPoint = Paint()..color = Colors.red;
+    // 绘制圆点
+    // canvas.drawCircle(Offset(0, 0), 10, paintPoint);
+  }
+
+  @override
+  bool shouldRepaint(CustomPainter oldDelegate) => false;
+}