1

CustomKeyboard/KeyboardViewController.m

@@ -100,6 +100,8 @@ static NSString *KBFormatMB(uint64_t bytes) {
   [self kb_consumePendingShopSkin];
   [self kb_applyDefaultSkinIfNeeded];
 
+  [self kb_startObservingAppGroupChanges];
+
   // 监听 App Group 配置变化，动态切换键盘布局
   [self kb_checkAndApplyLayoutIfNeeded];
 }
@@ -236,6 +238,7 @@ static NSString *KBFormatMB(uint64_t bytes) {
         removeObserver:self.kb_skinObserverToken];
     self.kb_skinObserverToken = nil;
   }
+  [self kb_stopObservingAppGroupChanges];
   [self kb_unregisterDarwinSkinInstallObserver];
 #if DEBUG
   if (_kb_debugDidCountAlive) {
@@ -275,10 +278,34 @@ static NSString *KBFormatMB(uint64_t bytes) {
 }
 
 - (void)kb_updateSuggestionEngineType:(NSString *)engineType {
-  // 根据 engineType 切换不同的联想引擎
-  // 例如：latin, pinyin_traditional, pinyin_simplified, bopomofo
   NSLog(@"[KeyboardViewController] Switching suggestion engine to: %@", engineType);
   [[KBSuggestionEngine shared] setEngineTypeFromString:engineType];
 }
 
+#pragma mark - App Group KVO
+
+- (void)kb_startObservingAppGroupChanges {
+  NSUserDefaults *appGroup = [[NSUserDefaults alloc] initWithSuiteName:AppGroup];
+  
+  __weak typeof(self) weakSelf = self;
+  self.kb_appGroupObserverToken = [[NSNotificationCenter defaultCenter]
+      addObserverForName:NSUserDefaultsDidChangeNotification
+                  object:appGroup
+                   queue:[NSOperationQueue mainQueue]
+              usingBlock:^(__unused NSNotification *_Nonnull note) {
+                __strong typeof(weakSelf) strongSelf = weakSelf;
+                if (!strongSelf) { return; }
+                [strongSelf kb_checkAndApplyLayoutIfNeeded];
+              }];
+  
+  NSLog(@"[KeyboardViewController] Started observing App Group changes");
+}
+
+- (void)kb_stopObservingAppGroupChanges {
+  if (self.kb_appGroupObserverToken) {
+    [[NSNotificationCenter defaultCenter] removeObserver:self.kb_appGroupObserverToken];
+    self.kb_appGroupObserverToken = nil;
+  }
+}
+
 @end