Merge branch 'master' into null_safety

* master:
  update tag example, add loading toast

example/lib/main_home.dart

@@ -13,6 +13,7 @@ import 'package:example/widgets/example_style_color.dart';
 import 'package:example/widgets/example_tab_bar.dart';
 import 'package:example/widgets/example_tag.dart';
 import 'package:example/widgets/example_text_field.dart';
+import 'package:example/widgets/example_toast.dart';
 import 'package:flutter/material.dart';
 import 'package:get/get.dart';
 
@@ -104,6 +105,10 @@ class _MainHomeState extends State<MainHome> {
           title: 'Pop Up Menu',
           onPressed: () => Get.to(ExamplePopUpMenu()),
         ),
+        _innerButton(
+          title: 'Toast',
+          onPressed: () => Get.to(ExampleToast()),
+        ),
       ],
     );
   }

example/lib/widgets/example_tag.dart

@@ -1,9 +1,8 @@
 import 'package:ansu_ui/ansu_ui.dart';
 import 'package:example/codeviewer/code_segments.dart';
-import 'package:example/common/code_view.dart';
+import 'package:example/component/example_scaffold.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_screenutil/flutter_screenutil.dart';
-import 'package:get/get.dart';
 import 'package:velocity_x/velocity_x.dart';
 
 class ExampleTag extends StatefulWidget {
@@ -17,22 +16,9 @@ class _ExampaleTagState extends State<ExampleTag> {
   bool _checked = false;
   @override
   Widget build(BuildContext context) {
-    return ASScaffold(
+    return ExampleScaffold(
       title: 'ASTag',
-        actions: [
-          IconButton(
-            icon: Icon(
-              Icons.code,
-              color: Colors.black54,
-            ),
-            onPressed: () => Get.to(
-              CodeView(
       text: (context) => CodeSegments.tag(context),
-              ),
-            ),
-          )
-        ],
-        body: Column(
       children: [
         // BEGIN tag
         ListTile(
@@ -84,8 +70,8 @@ class _ExampaleTagState extends State<ExampleTag> {
             text: 'TAG'.text.make(),
           ),
         ),
-            // END
       ],
-        ));
+      // END
+    );
   }
 }

example/lib/widgets/example_toast.dart

@@ -0,0 +1,32 @@
+import 'package:ansu_ui/toast/as_toast.dart';
+import 'package:example/codeviewer/code_segments.dart';
+import 'package:example/component/example_scaffold.dart';
+import 'package:flutter/material.dart';
+import 'package:velocity_x/velocity_x.dart';
+
+class ExampleToast extends StatelessWidget {
+  const ExampleToast({Key key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return ExampleScaffold(
+      title: 'Toast',
+      text: (context) => CodeSegments.toast(context),
+      children: [
+        // BEGIN toast
+        ListTile(
+          title: 'Toast'.text.make(),
+          onTap: () => ASToast.show('Toast!'),
+        ),
+        ListTile(
+          title: 'Toast'.text.make(),
+          onTap: () {
+            Function cancel = ASToast.loading;
+            Future.delayed(Duration(seconds: 2), () => cancel());
+          },
+        ),
+        // END
+      ],
+    );
+  }
+}

lib/pop_up_menu/pop_up_menu.dart

@@ -3,12 +3,12 @@ import 'package:flutter/material.dart';
 
 /// ## 弹框菜单
 ///```dart
-/// showASPopUpMenu<int>(
+/// int result = await showASPopUpMenu<int>(
 ///   context: context,
 ///   items: [
-///     PopupMenuItem(child: 'test'.text, value: 1),
+///     PopupMenuItem(child: Text('test'), value: 1),
 ///   ],
-/// ).then((value) {});
+/// );
 /// ```
 Future<T> showASPopUpMenu<T>({
   @required BuildContext context,

lib/toast/as_toast.dart

@@ -1,7 +1,30 @@
+import 'dart:ui';
+
 import 'package:bot_toast/bot_toast.dart';
+import 'package:flutter/material.dart';
 
 class ASToast {
   static show(String text) {
-    BotToast.showText(text: text);
+    BotToast.showText(
+      text: text,
+      borderRadius: BorderRadius.circular(20),
+    );
+  }
+
+  static Function get loading {
+    return BotToast.showCustomLoading(
+      toastBuilder: (cancel) {
+        return Center(
+          child: Material(
+            clipBehavior: Clip.antiAlias,
+            shape: StadiumBorder(),
+            child: Padding(
+              padding: const EdgeInsets.all(8.0),
+              child: CircularProgressIndicator(),
+            ),
+          ),
+        );
+      },
+    );
   }
 }