在我的導航欄中,我有一個可滾動的下拉列表。一旦用戶將鼠標懸停在它上面,它就會出現,並且他可以上下滾動以選擇鏈接。 它適用於所有桌面瀏覽器,但在iPad上顯示下拉菜單後,它會卡住,用戶無法上下滾動。下拉菜單與滾動不工作在iPad上
這裏是我使用的JS:
VAR maxHeight = 400; $(功能(){
$(".dropdown > li").hover(function() {
var $container = $(this),
$list = $container.find("ul"),
$anchor = $container.find("a"),
height = $list.height() * 1.1, // make sure there is enough room at the bottom
multiplier = height/maxHeight; // needs to move faster if list is taller
// need to save height here so it can revert on mouseout
$container.data("origHeight", $container.height());
// so it can retain it's rollover color all the while the dropdown is open
$anchor.addClass("hover");
// make sure dropdown appears directly below parent list item
$list
.show()
.css({
paddingTop: $container.data("origHeight")
});
// don't do any animation if list shorter than max
if (multiplier > 1) {
$container
.css({
height: maxHeight,
overflow: "hidden"
})
.mousemove(function(e) {
var offset = $container.offset();
var relativeY = ((e.pageY - offset.top) * multiplier) - ($container.data("origHeight") * multiplier);
if (relativeY > $container.data("origHeight")) {
$list.css("top", -relativeY + $container.data("origHeight"));
};
});
}
}, function() {
var $el = $(this);
// put things back to normal
$el
.height($(this).data("origHeight"))
.find("ul")
.css({ top: 0 })
.hide()
.end()
.find("a")
.removeClass("hover");
});
});
我不知道我做了解釋它正確(英文心不是我的第一語言),但你可以明白我的意思的https://jsfiddle.net/x7L4zgfk/1/
的可能重複[JavaScript的 - 不觸發的iPad/iPhone mousemove事件](http://stackoverflow.com/questions/14071285/javascript-mousemove-event-not- ipad-iphone) – twill