优化代码逻辑

lib/flutter_union_ad_stream.dart

@@ -1,7 +1,5 @@
 import 'dart:async';
-
 import 'package:flutter/services.dart';
-
 import 'flutter_union_ad.dart';
 
 /// @Description: dart类作用描述
@@ -9,15 +7,13 @@ const EventChannel tencentAdEventEvent =
     EventChannel("com.example.union_ad_ssgf/adevent");
 
 class FlutterUnionAdStream {
-  ///
-  /// # 注册stream监听原生返回的信息
+  /// 注册stream监听原生返回的信息
   /// [rewardAdCallBack] 激励广告回调
   /// [interactionAdCallBack] 插屏广告回调
-  ///
   static StreamSubscription initAdStream(
       {FlutterUnionAdRewardCallBack? flutterTencentadRewardCallBack,
       FlutterUnionAdInteractionCallBack? flutterTencentadInteractionCallBack}) {
-    StreamSubscription _adStream =
+    StreamSubscription adStream =
         tencentAdEventEvent.receiveBroadcastStream().listen((data) {
       switch (data[FlutterUnionAdCode.adType]) {
         ///激励广告
@@ -134,7 +130,7 @@ class FlutterUnionAdStream {
           break;
       }
     });
-    return _adStream;
+    return adStream;
   }
 
   static void deleteAdStream(StreamSubscription stream) {