Ios Can'；t与iCloud同步域

我正在尝试将我的应用程序中的领域与iCloud/CloudKit同步，但没有成功

这是我的源代码：

-(void)sync
{
    NSURL *baseURL = [[NSFileManager defaultManager] URLForUbiquityContainerIdentifier:nil];

    if (baseURL) //iCloud is active
    {
        NSURL *serverURL = [NSURL URLWithString:@"http://myMacBookNwtworkIP:9080"]; //Realm Object Server is up and running at this URL
        RLMSyncCredential *usernameCredential = [RLMSyncCredential credentialWithUsername:@"myUsername"
                                                                                 password:@"myPassword"
                                                                                  actions:RLMAuthenticationActionsUseExistingAccount];
        RLMSyncCredential *iCloudCredential = [RLMSyncCredential credentialWithICloudToken:@"myiCloudToken"];

        [RLMSyncUser authenticateWithCredential:usernameCredential
                                  authServerURL:serverURL
                                   onCompletion:^(RLMSyncUser *user, NSError *error) {
                                       if (user) { //user recognized in my real object server
                                           // can now open a synchronized RLMRealm with this user
                                           RLMRealmConfiguration *config = [RLMRealmConfiguration defaultConfiguration];
        /* CRASH AT THIS LINE! */          config.syncConfiguration = [[RLMSyncConfiguration alloc] initWithUser:user realmURL:serverURL];
                                           RLMRealm *realm = [RLMRealm realmWithConfiguration:config error:nil];// Any changes made to this Realm will be synced across all devices!
                                       } else if (error) {
                                           // handle error
                                           NSLog(@"error %@",error);
                                       }
                                   }];
    }
}

当我试图执行

config.syncConfiguration = [[RLMSyncConfiguration alloc] initWithUser:user realmURL:serverURL];

我得到这个错误

提供的URL（）不是有效的域URL

我怎样才能解决它

此外，由于这是我第一次尝试在iCloud中保存内容，我应该如何使用

iCloudCredential

？事实上，如果我用它替换

usernamecdential

，那么

user

总是为零

我在这些链接中遵循了以下步骤：

---

为了防止崩溃，有必要指定“realm”协议而不是“http”，如下所示

config.syncConfiguration = [[RLMSyncConfiguration alloc] initWithUser:user realmURL:[NSURL URLWithString:@"realm://myMacBookNwtworkIP:9080"]];

多亏了