hyzp_ybqx-Commit101：已经添加试用版本水印

lib/pages/tabs/Tabs.dart

@@ -1,4 +1,5 @@
 import 'package:badges/badges.dart';
+import 'package:disable_screenshots/disable_screenshots.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_screenutil/flutter_screenutil.dart';
 import 'package:hyzp_ybqx/pages/tabs/page4_myMsics_new.dart';
@@ -18,10 +19,19 @@ class Tabs extends StatefulWidget {
 }
 
 class _TabsState extends State<Tabs> {
+  // 初始化插件
+  DisableScreenshots _watermarkPlugin = DisableScreenshots();
+
   //try_setState();   //避免如下异常报错
   try_setState() {
     try {
-      setState(() {});
+      if (mounted) {
+        setState(() {});
+        // 添加默认样式的水印
+        _watermarkPlugin.addWatermark(context, "试用版本水印", rowCount: 4, columnCount: 8);
+        // _watermarkPlugin必须放在这里，放在Widget build(BuildContext context)函数中会报错：
+        // Dart Unhandled Exception: setState() or markNeedsBuild() called during build.
+      }
     } catch (e) {
       print('setState(() {})异常：${e}');
     }