feat(LoadMore): add LoadMore widget

Author: 2534290808

lib/flutter_weui.dart

@@ -8,4 +8,4 @@ export 'picker.dart';
 export 'slider.dart';
 export 'switch.dart';
 export 'weui_icon.dart';
-
+export 'load_more.dart';

lib/load_more.dart

@@ -0,0 +1,90 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/cupertino.dart';
+
+enum LoadType {
+  loading,
+  noData,
+  dot,
+}
+
+class LoadMore extends StatelessWidget {
+  LoadMore({Key key, this.type = LoadType.noData}) : super(key: key);
+
+  final LoadType type;
+  @override
+  Widget build(BuildContext context) {
+    double screenWidth = MediaQuery.of(context).size.width;
+    return Row(
+      mainAxisAlignment: MainAxisAlignment.center,
+      crossAxisAlignment: CrossAxisAlignment.center,
+      children: <Widget>[
+        Container(
+          width: screenWidth * 0.65,
+          margin: const EdgeInsets.symmetric(vertical: 15),
+          child: Row(
+            children: <Widget>[
+              Expanded(
+                  child: Divider(
+                height: 1,
+              )),
+              Padding(
+                padding: const EdgeInsets.symmetric(horizontal: 5),
+                child: Row(
+                  children: <Widget>[
+                    Offstage(
+                      child: CupertinoActivityIndicator(),
+                      offstage: type != LoadType.loading,
+                    ),
+                    type == LoadType.dot
+                        ? Container(
+                            width: 4,
+                            height: 4,
+                            child: Text(""),
+                            decoration: BoxDecoration(
+                              color: Color(0xFFE5E5E5),
+                              borderRadius: BorderRadius.all(Radius.circular(2))
+                            ),
+                          )
+                        : Text(type == LoadType.loading ? "正在加载" : "暂无数据",style: TextStyle(fontSize: 14),),
+                  ],
+                ),
+              ),
+              Expanded(
+                  child: Divider(
+                height: 1,
+              )),
+            ],
+          ),
+        )
+      ],
+    );
+    // TODO: implement build
+    return Container(
+      child: Row(
+        crossAxisAlignment: CrossAxisAlignment.center,
+        children: <Widget>[
+          Expanded(
+            child: Text(""),
+            flex: 4,
+          ),
+          Expanded(
+            flex: 12,
+            child: Row(
+              children: <Widget>[
+                Expanded(child: Divider()),
+                Row(
+                  children: <Widget>[CupertinoActivityIndicator(), Text("正在加载")],
+                ),
+                Expanded(child: Divider()),
+              ],
+            ),
+          ),
+          Expanded(
+            child: Text(""),
+            flex: 4,
+          )
+        ],
+      ),
+    );
+  }
+}