diff --git a/ui/lib/providers/APIs.dart b/ui/lib/providers/APIs.dart
index 98579d0..0ed646b 100644
--- a/ui/lib/providers/APIs.dart
+++ b/ui/lib/providers/APIs.dart
@@ -131,7 +131,7 @@ class APIs {
     if (sp.code != 0) {
       throw sp.message;
     }
-    return sp.data as List<String>;
+    return sp.data==null? []:sp.data as List<String>;
   }
 
   static Future<List<String>> downloadAllMovies() async {
@@ -142,7 +142,7 @@ class APIs {
     if (sp.code != 0) {
       throw sp.message;
     }
-    return sp.data as List<String>;
+    return sp.data==null? []:sp.data as List<String>;
   }
 
   static Future<String> parseTvName(String s) async {
diff --git a/ui/lib/welcome_page.dart b/ui/lib/welcome_page.dart
index 17c1350..e538423 100644
--- a/ui/lib/welcome_page.dart
+++ b/ui/lib/welcome_page.dart
@@ -123,11 +123,15 @@ class WelcomePageState extends ConsumerState<WelcomePage> {
       onPressed: () async {
         if (uri == WelcomePage.routeMoivie) {
           await APIs.downloadAllMovies().then((v) {
-            showSnakeBar("开始下载电影：$v");
+            if (v.isNotEmpty) {
+              showSnakeBar("开始下载电影：$v");
+            }
           });
         } else {
           await APIs.downloadAllTv().then((v) {
-            showSnakeBar("开始下载剧集：$v");
+            if (v.isNotEmpty) {
+              showSnakeBar("开始下载剧集：$v");
+            }
           });
         }
       },