switch_button.clicked.connect (on_switch_button_clicked);
search_button.clicked.connect (on_search_button_clicked);
my_info.clicked.connect (on_my_info_clicked);
switch_button.clicked.connect (on_switch_button_clicked);
search_button.clicked.connect (on_search_button_clicked);
my_info.clicked.connect (on_my_info_clicked);