iPad/iPhone定向体类

Posted 2021-02-24

This function will detect the orientation (portrait/landscape) of an ios device and set the body class to either portrait or landscape, as well as providing a global variable for use elsewhere in your JS.

If you require multiple classes on your body tag, simply alter the code to use jQuery's addClass() and removeClass() functions.

function orient() {  
    if (window.orientation == 0 || window.orientation == 180) {
    	$("body").attr("class", "portrait");
	orientation = 'portrait';
 
    	return false;
    }
	else if (window.orientation == 90 || window.orientation == -90) {
    	$("body").attr("class", "landscape");
    	orientation = 'landscape';
 
    	return false;
    }
}
 
/* Call orientation function on page load */
$(function(){
	orient();
});
 
/* Call orientation function on orientation change */
$(window).bind( 'orientationchange', function(e){
	orient();
});