基于display属性的切换. 将需要不可见的二级菜单ul元素的display元素设为none,当需要可见的时候改为block. .menu ul li ul { display: none; } .menu ul li:hover ul { display: block; width: 100px; position: absolute; }
添加四个控件 TToolbar Alignment: alTop TSpeedButton Alignment: alRight StyleLookUp: detailstoolbutton Margin, Right: 5 (this is set in case you want to carry this UI over to iOS as well, to account for both bordered (iOS6) and non-bordered (iOS7) button si