1、toast，设置显示时间

lib/utils/toast_util.dart

@@ -3,17 +3,28 @@ import 'package:flutter_clx_base/common/extension.dart';
 import 'package:fluttertoast/fluttertoast.dart';
 
 class ToastUtil {
-  static void showToast(String? txt,{Toast toastLength = Toast.LENGTH_SHORT}) {
-    if(txt.isNullOrEmpty()){
+  static void showToast(String? txt,
+      {ToastDuration toastLength = ToastDuration.short}) {
+    if (txt.isNullOrEmpty()) {
       txt = "信息异常";
     }
     Fluttertoast.showToast(
         msg: txt ?? "",
-        toastLength: toastLength,
+        toastLength: toastLength == ToastDuration.long
+            ? Toast.LENGTH_LONG
+            : Toast.LENGTH_SHORT,
         gravity: ToastGravity.BOTTOM,
         // timeInSecForIos: 1,
         backgroundColor: Colors.grey,
         textColor: Colors.white,
         fontSize: 16.0);
   }
-}
\ No newline at end of file
+}
+
+enum ToastDuration {
+  /// Show Short toast for 1 sec
+  short,
+
+  /// Show Long toast for 5 sec
+  long
+}