JS设置页面下拉刷新

JS设置页面下拉刷新

//滑动动作  
// $('body').on('touchstart',touchStart);
// $('body').on('touchmove',touchMove);
// $('body').on('touchend',touchEnd);
document.body.addEventListener("touchstart", touchStart, false);
document.body.addEventListener("touchmove", touchMove, false);
document.body.addEventListener("touchend", touchEnd, false);
var canefresh = false;
function touchStart(e){
	if($(window).scrollTop() <= 0){
		canefresh = true;
	}
	// var touch = e.originalEvent.targetTouches[0];
	var touch = e.touches[0];
	startY = touch.pageY;
}  
function touchMove(e){
	// e.preventDefault();
	if(!canefresh){
		return;
	}
	// var touch = e.originalEvent.targetTouches[0];
	var touch = e.touches[0];
	endY = touch.pageY;
	$('body').css('padding-top',endY - startY);
}
function touchEnd(e){
	if(!canefresh){
		return;
	}
	console.log(endY - startY);
	if((endY - startY) > 50){
		location.reload();
	}
	$('body').css('padding-top','');
	canefresh = false;
}