invocationDidComplete: always give me nil object - iOS about signalr-client-swift HOT 17 CLOSED

How does the hub method look like on the server side?

from signalr-client-swift.

i'm getting response here "createHubMessage(payload: Data)" but in invocationDidComplete always nil.

and then said "No handler registered for method 'market'"

from signalr-client-swift.

Because I don't know how the server side hub method looks like I can only speculate. I think your server side hub method is void and it invokes the client method. If this is the case your handler does not have any value because it is void on the server side and is invoked to let you know that the server side hub method invocation completed without error. The error: "No handler registered for method 'market'" indicates you invoked a client side method from the server but you have not registered any handler to handle this invocation.
If this is not the case or you need more information you need to show me code - a simplified repro (remove as much logic as you can) is the best.

from signalr-client-swift.

public async Task MarketRefresh(int baseCurrencyId) {
   object[] param = {
    new SqlParameter("@BaseCurrencyId", baseCurrencyId)
   };
   var dr = await SqlHelper.SqlHelper.ExecuteReaderAsync(
    this.connectionStrings.Value.BuucoinExchange,
    "GetMarketData",
    param);
   var lst = new List<Dictionary<string, object>>();
   while (await dr.ReadAsync()) {
    var obj = new Dictionary<string, object>();
    for (var i = 0; i < dr.FieldCount; i++) {
     obj[dr.GetName(i)] = dr[i].GetType().Name == "DBNull" ? null : dr[i];
    }
    lst.Add(obj);
   }

   await this.Clients.All.SendAsync("marketRefresh", lst);
  }

this is my method.

from signalr-client-swift.

So, the server method does not return any value (it returns a Task which is an async equivalent to void). This explains why you never see any result in your handler. Since the hub method does not return value you should use the invoke overload that does not take the return type.
To see data sent by await this.Clients.All.SendAsync("marketRefresh", lst); you need to register a handler on the client. It would look something like that:

chatHubConnection!.on(method:"marketRefresh", callback: { args, _ in 
...
})

One caveat is that I don't think it will work with the values you are sending. From the server side you are sending a Dictionary of objects and I am pretty sure that the client will not know how to handle the data it returns. I have started looking at the Codable protocol (#35) but have not implemented it yet and the client only recognizes primitive types by itself. You can make it work wit complex types if you implement the TypeConverter protocol.

from signalr-client-swift.

thank you @moozzyk now it's working using
chatHubConnection!.on(method:"marketRefresh", callback: { args, _ in
...
})

from signalr-client-swift.

No problem! Out of curiosity - how do you handle the argument? Did NSDictionary actually work?

from signalr-client-swift.

chatHubConnection!.on(method:"marketRefresh", callback: { args, _ in
...
})

chatHubConnection?.invoke(method: "marketRefresh", arguments: [OrderID], returnType: Any.self, invocationDidComplete: { (args, error) in

})

call method like this. both at a time.

from signalr-client-swift.

Thanks! I will close the issue now since the question has been answered.

from signalr-client-swift.

I am not able to send Any.self as result type

Getting Below Error, Please help

Protocol type 'Any' cannot conform to 'Decodable' because only concrete types can conform to protocols

    self.liveSpaceHubConnection!.invoke(method: "getlatestspacecount", 1, resultType: Any.self, invocationDidComplete: { (args, error) in
        if error == nil {
            print(args ?? "Not Found")
        } else {
            print(error?.localizedDescription ?? "Error")
        }
    })

from signalr-client-swift.

from signalr-client-swift.

Message received: {"type":1,"target":"getlatestspacecount","arguments":[[{"spaceTypeId":2,"spaceTypeName":"MeetingRoom","totalCount":4,"availableCount":4},{"spaceTypeId":1,"spaceTypeName":"Workstation","totalCount":4,"availableCount":4},{"spaceTypeId":3,"spaceTypeName":"JITRoom","totalCount":4,"availableCount":3},{"spaceTypeId":4,"spaceTypeName":"FocusArea","totalCount":4,"availableCount":4}]]}

The above is the response that I received from server,

I am quite confuse, how I can read/parse this response

Please help!!

from signalr-client-swift.

Your server is sending a collection of structured object. You need to create a corresponding struct/class in Swift so that the client could materialize this payload. For instance if you look at the tests the following hub method on the server side returns a collection of structural objects:

Here is how the type is defined on the server side:

on the client side the corresponding type looks like this:

(as a side note, I believe you don't need to explicitly mark that the struct is Codable - I think if all members are Codable the struct will automatically be Codable) and is invoked as follows:

This seems to be exactly what you are after - even the return type is an array.

P.S. Next time please open a new issue instead of hijacking an existing issue which is not only unrelated but also closed.

from signalr-client-swift.

Sorry about the inconvenience, will definitely take care next time

Able to do solve the issue from above snippets, however getting this below error

error: No handler registered for method 'getlatestspacecount'
It's not possible to set callback with invoke method, Please clarify

Thanks for help.. :)

from signalr-client-swift.

Handlers are registered like this:

from signalr-client-swift.

Got it thanks for help, already did that, just wondered , if I can pass with invoke method

from signalr-client-swift.

These are two different scenarios. If your server hub method returns a result you will get it as an input to the invocation completion handler. If the server is invoking a client hub method you will get it as an argument in the client method handler.

from signalr-client-swift.