如何在IOS绑定中使用ResultBuffer公开Objective-C指针方法

Question

I'm trying to Invoke Objective-C Method

   -(nabto_status_t)nabtoRpcInvoke:(NSString *)url withResultBuffer:(char 
    **)jsonResponse;

I used Objective-Sharpie Tool to generate the follow Method

 [Export("nabtoRpcInvoke:withResultBuffer:")]
 unsafe nabto_status_t RpcInvoke(string url, ref byte jsonResponse);

Please help expose me it correctly so i can get the JsonResponse String which i can use in IOS app.

Answer 1

I Made these changes to Generated Method

 [Export("nabtoRpcInvoke:withResultBuffer:")]
        unsafe nabto_status_t RpcInvoke(string url, ref IntPtr 
       jsonResponse);

and then I got the JsonResonse as follow.

        IntPtr buff=new IntPtr() ;
        status = Client.RpcInvoke(URL, ref buff);

        byte[] newArray = new byte[buff.ToInt32() + 1];

        for (int m = 0; m < buff.ToInt32(); m++)
        {
            byte b = Marshal.ReadByte(buff,m);
            newArray[m] = b;
        }


        var JsonResponse = System.Text.Encoding.UTF8.GetString(newArray);