How to Fix Drop Down Menu not Working on iPad

jQuery(document).ready(function($){

    if((navigator.userAgent.match(/iPhone/i)) || (navigator.userAgent.match(/iPod/i)) || (navigator.userAgent.match(/iPad/i))) {
     $(".main-navigation li:has(ul) > a").bind('touchstart',function(e){

        e.stopPropagation();
    	e.preventDefault();

		if($(this).hasClass("oneTouch")){
  			$(this).removeClass("oneTouch");
  			window.location = $(this).attr("href");
  		}
		else{
			$(this).addClass("oneTouch");
		}

     });
    }

});

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