add_menu_page( string $page_title, string $menu_title, string $capability, string $menu_slug, callable $function = '', string $icon_url = '', int $position = null )

class Kay_Menu {
	public function __construct () {
		// 添加菜单
		add_action('admin_menu', array($this, 'add_menu'));
	}
	// 
	function add_menu (){
		add_menu_page(__('Kay Options', 'show'), 'menu_title', 'manage_options', 'menu_slug', array($this, 'add_setting_page'), '
dashicons-chart-pie', 5);
	}
	// 
	function add_setting_page () {
		?>
		<h1>hello,Kay!</h1>
		<?php
	}
}