清除所有历史版本以减少仓库大小

lib/views/widgets/RenderObjectWidget/SingleChildRenderObjectWidget/ConstrainedBox.dart

@@ -0,0 +1,71 @@
+import 'package:flutter/material.dart';
+//    {
+//      "widgetId": 80,
+//      "name": 'BoxConstraints基本使用',
+//      "priority": 1,
+//      "subtitle":
+//          "【child】 : 孩子组件   【Widget】\n"
+//          "【minWidth】 : 最小宽   【double】\n"
+//          "【minHeight】 : 最小高   【double】\n"
+//          "【maxHeight】 : 最大高   【double】\n"
+//          "【maxWidth】 : 最大宽   【double】",
+//    }
+class CustomConstrainedBox extends StatefulWidget {
+  @override
+  _CustomConstrainedBoxState createState() => _CustomConstrainedBoxState();
+}
+
+class _CustomConstrainedBoxState extends State<CustomConstrainedBox> {
+  var _text = '';
+
+  @override
+  Widget build(BuildContext context) {
+    var child = Container(
+      alignment: Alignment.center,
+      color: Colors.cyanAccent,
+      width: 40,
+      height: 40,
+      child: Text("Static"),
+    );
+
+    var box = ConstrainedBox(
+      constraints: BoxConstraints(
+        minHeight: 50,
+        minWidth: 20,
+        maxHeight: 80,
+        maxWidth: 150,
+      ),
+      child: Container(color: Colors.orange, child: Text(_text)),
+    );
+    return Column(
+      children: <Widget>[
+        Container(
+          color: Colors.grey.withAlpha(22),
+          width: 300,
+          height: 100,
+          child: Row(
+            children: <Widget>[child, UnconstrainedBox(child: box), child],
+          ),
+        ),
+        _buildInput(),
+      ],
+    );
+  }
+
+  Widget _buildInput() {
+    return Padding(
+      padding: const EdgeInsets.all(18.0),
+      child: TextField(
+        decoration: InputDecoration(
+          border: OutlineInputBorder(),
+          hintText: '请输入',
+        ),
+        onChanged: (v) {
+          setState(() {
+            _text = v;
+          });
+        },
+      ),
+    );
+  }
+}