When setting up a UITableView, my return rows cannot be executed no matter how many they are. Even when running, they are all the same.. There are only a few rows.

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    
    return 20;
}

return 20 or 50. Or more or less is the same.. The results displayed on the simulator are the same, only a few lines, and when I operate the Cell later, it is also displayed on the tableView Not coming out.