1、优化软键盘遮挡toast问题-设置中心位置展示；

lib/utils/toast_util.dart

+import 'dart:io';
 import 'package:flutter/material.dart';
 import 'package:flutter_clx_base/common/extension.dart';
 import 'package:fluttertoast/fluttertoast.dart';
@@ -13,7 +14,8 @@ class ToastUtil {
         toastLength: toastDuration == ToastDuration.long
             ? Toast.LENGTH_LONG
             : Toast.LENGTH_SHORT,
-        gravity: ToastGravity.BOTTOM,
+        // ios 软键盘遮挡toast，设置中心展示
+        gravity: Platform.isIOS ? ToastGravity.CENTER : ToastGravity.BOTTOM,
         // timeInSecForIos: 1,
         backgroundColor: const Color(0xB3000000),
         textColor: Colors.white,