🎨 当前组件结构重构完毕

lib/views/widgets/SingleChildRenderObjectWidget/FittedBox/node1_base.dart

@@ -0,0 +1,87 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_unit/app/res/cons.dart';
+/// create by 张风捷特烈 on 2020-04-19
+/// contact me by email 1981462002@qq.com
+/// 说明:
+
+//    {
+//      "widgetId": 87,
+//      "name": 'FittedBox基本使用',
+//      "priority": 1,
+//      "subtitle":
+//          "【child】 : 孩子组件   【Widget】\n"
+//          "【fit】 : 适应模式   【BoxFit】\n"
+//          "【alignment】 : 对齐方式   【AlignmentGeometry】",
+//    }
+class CustomFittedBox extends StatefulWidget {
+  @override
+  _CustomFittedBoxState createState() => _CustomFittedBoxState();
+}
+
+class _CustomFittedBoxState extends State<CustomFittedBox> {
+  double _childW = 20;
+  double _childH = 30;
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: <Widget>[
+        Wrap(
+            spacing: 10,
+            runSpacing: 10,
+            children: BoxFit.values
+                .map((mode) => Column(
+                      children: <Widget>[
+                        _buildChild(mode),
+                        SizedBox(
+                          height: 10,
+                        ),
+                        Text(mode.toString().split('.')[1])
+                      ],
+                    ))
+                .toList()),
+        _buildSlider()
+      ],
+    );
+  }
+
+  Widget _buildChild(BoxFit m) {
+    return Container(
+      color: Colors.grey.withAlpha(44),
+      width: 80,
+      height: 60,
+      child: FittedBox(
+        fit: m,
+        child: Container(
+          width: _childW,
+          height: _childH,
+          decoration: BoxDecoration(
+            //添加渐变色
+            gradient: LinearGradient(
+                stops: <double>[0.0, 1 / 6, 2 / 6, 3 / 6, 4 / 6, 5 / 6, 1.0],
+                colors: Cons.rainbow.map((e) => Color(e)).toList()),
+          ),
+        ),
+      ),
+    );
+  }
+
+  Widget _buildSlider() => Column(
+        children: <Widget>[
+          Slider(
+              min: 10,
+              max: 150,
+              divisions: 100,
+              label: '子宽度:' + _childW.toStringAsFixed(1),
+              value: _childW,
+              onChanged: (v) => setState(() => _childW = v)),
+          Slider(
+              min: 10,
+              max: 150,
+              divisions: 100,
+              label: '子高度:' + _childH.toStringAsFixed(1),
+              value: _childH,
+              onChanged: (v) => setState(() => _childH = v)),
+        ],
+      );
+}