🎨 stateful组件重构完毕

2020-04-30 07:09:37 +08:00
parent fc84531af6
commit 60eb0f04fd
62 changed files with 1114 additions and 990 deletions
--- a/lib/views/widgets/StatefulWidget/PageView/node3_controller.dart
+++ b/lib/views/widgets/StatefulWidget/PageView/node3_controller.dart
@@ -0,0 +1,84 @@
+import 'package:flutter/material.dart';
+
+/// create by 张风捷特烈 on 2020-03-28
+/// contact me by email 1981462002@qq.com
+/// 说明: 
+
+//    {
+//      "widgetId": 165,
+//      "name": 'PageView控制器简单实用',
+//      "priority": 3,
+//      "subtitle":
+//          "【controller】 : 页面控制器   【PageController】",
+//    }
+class CtrlPageView extends StatefulWidget {
+  @override
+  _CtrlPageViewState createState() => _CtrlPageViewState();
+}
+
+class _CtrlPageViewState extends State<CtrlPageView> {
+  final data = <Color>[
+    Colors.orange[50],
+    Colors.orange[100],
+    Colors.orange[200],
+    Colors.orange[300],
+    Colors.orange[400],
+    Colors.orange[500],
+    Colors.orange[600],
+    Colors.orange[700],
+    Colors.orange[800],
+    Colors.orange[900],
+  ];
+
+  PageController _controller;
+
+  @override
+  void dispose() {
+    _controller.dispose();
+    super.dispose();
+  }
+
+  @override
+  void initState() {
+    super.initState();
+    _controller=PageController(
+      viewportFraction: 0.8,
+      initialPage: (data.length/2).round()
+    );
+
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      height: 150,
+      child: PageView(
+        controller: _controller,
+        onPageChanged: (position) {
+          print(position);
+        },
+        children: data
+            .map((color) =>
+            Container(
+              alignment: Alignment.center,
+              width: 90,
+              color: color,
+              child: Text(
+                colorString(color),
+                style: TextStyle(color: Colors.white,
+                    fontSize: 24, shadows: [
+                      Shadow(
+                          color: Colors.black,
+                          offset: Offset(.5, .5),
+                          blurRadius: 2)
+                    ]),
+              ),
+            ))
+            .toList(),
+      ),
+    );
+  }
+
+  String colorString(Color color) =>
+      "#${color.value.toRadixString(16).padLeft(8, '0').toUpperCase()}";
+}