code-index-mcp

#import "UserManager.h" @implementation UserManager + (UserManager *)sharedManager { static UserManager *sharedInstance = nil; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ sharedInstance = [[UserManager alloc] init]; sharedInstance.users = [[NSMutableArray alloc] init]; }); return sharedInstance; } - (void)addUser:(Person *)user { if (user) { [self.users addObject:user]; NSLog(@"Added user: %@", user.name); } } - (Person *)findUserByName:(NSString *)name { for (Person *user in self.users) { if ([user.name isEqualToString:name]) { return user; } } return nil; } - (void)removeUser:(Person *)user { if (user) { [self.users removeObject:user]; NSLog(@"Removed user: %@", user.name); } } - (NSInteger)userCount { return self.users.count; } @end