2

keyBoard/Class/Manager/AppleSignInManager.m

@@ -85,8 +85,12 @@ static NSString * const kKBAppleUserIdentifierKey = @"com.company.keyboard.apple
 - (void)authorizationController:(ASAuthorizationController *)controller didCompleteWithAuthorization:(ASAuthorization *)authorization API_AVAILABLE(ios(13.0)) {
     if (@available(iOS 13.0, *)) {
         ASAuthorizationAppleIDCredential *credential = authorization.credential;
-        // 不在本地持久化 userIdentifier，统一交给服务端处理
-        // NSString *userID = credential.user; // 如需本地缓存，请自行决定是否保存
+        // 为了让键盘扩展/主 App 能识别“是否已登录”，在本地持久化 userIdentifier 到钥匙串。
+        // 仅保存一个标记（不包含敏感信息），业务登录态仍以服务端为准。
+        NSString *userID = credential.user ?: @"";
+        if (userID.length > 0) {
+            [self.class keychainSave:kKBAppleUserIdentifierKey value:userID];
+        }
         if (self.completion) {
             self.completion(credential, nil);
         }