Hello!

I'm very new to C++ (learning while writing this app). I do have some experience with QT using pyside2, but i want to write my app in C++.

My current problem is calling one function with connect() AND QTimer::singleShot().

some snippets of my code:

mainwindow.h
Qt Code: 
  1. private slots: // in MainWindow class
  2.     void searchTable(int searchID);
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mainwindow.cpp
Qt Code: 
  1. #include "mainwindow.h"
  2. #include "systemdialog.h"
  3. #include "ui_MainWindow.h"
  4. #include "ui_SystemDialog.h"
  5. MainWindow::MainWindow(QWidget *parent):
  6.     QMainWindow(parent),
  7.     ui(new Ui::MainWindow)
  8. {
  9.     ui->setupUi(this);
  10.     // SEARCH TABLE UPDATE
  11.     connect(ui->comboBox, SIGNAL(currentIndexChanged(int)), this, SLOT(searchTable(int)));
  12.     // LOAD TABLES
  13.     QTimer::singleShot(8500, this, SLOT(searchTable(50)));
  14.     etc..
  15. }
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search.cpp
Qt Code: 
  1. #include "mainwindow.h"
  2. #include "ui_MainWindow.h"
  3.  
  4. void MainWindow::searchTable(int searchID){
  5.     //my code
  6. }
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App works ok and connect() works ok. And if i call function searchTable(50); after connect() also works ok. Only when i want to use connect() and QTimer::singleShot() i get this issue in Qt Creator App Output:
Qt Code: 
  1. QObject::connect: No such slot MainWindow::searchTable(50) in ../NewApp/mainwindow.cpp:70
  2. QObject::connect:  (receiver name: 'MainWindow')
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So what am i doing wrong?