IOS 账号在另一个设备上登录，为什么不回调？

需要在当前页面调用registerNotifications方法注册代理
-(void)registerNotifications
{
    [self unregisterNotifications];
    
    [[EaseMob sharedInstance].chatManager addDelegate:self delegateQueue:nil];
    //[[EaseMob sharedInstance].callManager addDelegate:self delegateQueue:nil];
}

-(void)unregisterNotifications
{
    [[EaseMob sharedInstance].chatManager removeDelegate:self];
    //[[EaseMob sharedInstance].callManager removeDelegate:self];
}