✨ 添加IntrinsicHeight、IntrinsicWidth、ChipTheme、NavigationToolbar组件

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

@@ -0,0 +1,75 @@
+import 'package:flutter/material.dart';
+
+/// create by 张风捷特烈 on 2020/7/21
+/// contact me by email 1981462002@qq.com
+/// 说明:
+
+//    {
+//      "widgetId": 297,
+//      "name": 'IntrinsicWidth基本使用',
+//      "priority": 1,
+//      "subtitle":
+//          "【child】 : 子组件   【Widget】\n"
+//          "如示例:上面宽可变动，中间宽固定,下面宽取前两者的最高值。",
+//    }
+
+class IntrinsicWidthDemo extends StatefulWidget {
+  @override
+  _IntrinsicWidthDemoState createState() => _IntrinsicWidthDemoState();
+}
+
+class _IntrinsicWidthDemoState extends State<IntrinsicWidthDemo> {
+  var _height =120.0;
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      child: Column(
+        children: <Widget>[
+          buildChild(_height),
+          SizedBox(height: 10),
+          _buildSlider()
+        ],
+      ),
+    );
+  }
+
+  Widget buildChild(double leftWidth) {
+    return IntrinsicWidth(
+      child: Column(
+        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: <Widget>[
+          Container(
+            height: 50,
+            width: leftWidth,
+            color: Colors.yellow,
+            alignment: Alignment.center,
+            child: Text("width:${leftWidth.toStringAsFixed(1)}"),
+          ),
+          Container(
+            color: Colors.blue,
+            width: 150,
+            height: 60,
+            alignment: Alignment.center,
+            child: Text("固定宽"),
+          ),
+          Container(
+            color: Colors.red,
+            height: 40,
+            alignment: Alignment.center,
+            child: Text("最宽"),
+          )
+        ],
+      ),
+    );
+  }
+
+  Widget _buildSlider() =>Slider(
+    value: _height,
+    max: 200.0,
+    min: 80.0,
+    divisions: 17,
+    onChanged: (v)=> setState(() => _height= v),
+  );
+}