diff --git a/LEEThemeDemo/LEEThemeDemo/AppDelegate.m b/LEEThemeDemo/LEEThemeDemo/AppDelegate.m
index 7797e64..ad53478 100644
--- a/LEEThemeDemo/LEEThemeDemo/AppDelegate.m
+++ b/LEEThemeDemo/LEEThemeDemo/AppDelegate.m
@@ -42,6 +42,8 @@ - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(
     
     self.window = [[MainWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
     
+    self.window.backgroundColor = [UIColor whiteColor];
+    
     [self.window makeKeyAndVisible];
     
     self.window.rootViewController = [[TabBarController alloc] init];
diff --git a/LEEThemeDemo/LEEThemeDemo/MainWindow.m b/LEEThemeDemo/LEEThemeDemo/MainWindow.m
index 3615e9e..d636f03 100644
--- a/LEEThemeDemo/LEEThemeDemo/MainWindow.m
+++ b/LEEThemeDemo/LEEThemeDemo/MainWindow.m
@@ -39,7 +39,7 @@ - (instancetype)initWithFrame:(CGRect)frame
 
 - (void)traitCollectionDidChange:(UITraitCollection *)previousTraitCollection {
     [super traitCollectionDidChange:previousTraitCollection];
-    NSLog(@"%ld", (long)self.traitCollection.userInterfaceStyle);
+    
     // 根据系统样式变化 重新启用相应的主题 以达到同步的效果
     if (@available(iOS 13.0, *)) {
         switch (self.traitCollection.userInterfaceStyle) {