获取元素(这里定位元素A)距离顶部的高度,接着设定scroll滚动的事件,比如超过那个高度,把A的位置设定为fixed,小于该高度,修改回relative. 方法一: $(function() { var elm = $('.nav'); var startPos = $(elm).offset().top; $.event.add(window, "scroll", function() { var p = $(window).scrollTop(); $(elm).css('pos
singleTouchView.getViewTreeObserver().addOnGlobalLayoutListener( new ViewTreeObserver.OnGlobalLayoutListener() { private int heightDifference; <a href="http://home.51cto.com/index.php?s=/space/5017954" target="_blank">@override&l