update ios project

update ios project

source/lib/widgets/circle_painter.dart

@@ -0,0 +1,37 @@
+import 'dart:math';
+
+import 'package:flutter/material.dart';
+
+///
+/// desc:
+///
+class CirclePainter extends CustomPainter {
+  final double progress;
+
+  final double strokeWidth;
+  final Color color;
+
+  Paint _paint = Paint();
+
+  CirclePainter(
+      {this.progress = 0.0, this.strokeWidth = 1.0, this.color = Colors.white});
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    _paint
+      ..style = PaintingStyle.stroke
+      ..strokeWidth = strokeWidth
+      ..color = color;
+
+    double radius = min(size.width, size.height) / 2;
+    canvas.drawCircle(
+        Offset(size.width / 2, size.height / 2), radius * progress, _paint);
+  }
+
+  @override
+  bool shouldRepaint(covariant CirclePainter old) {
+    return progress != old.progress ||
+        strokeWidth != old.strokeWidth ||
+        color != old.color;
+  }
+}