我想知道如何在移动和桌面视图中将下拉列表视为http://www.brotherbots.com/上的下拉列表。我结合了w3schools的一些例子。它适用于桌面视图，但不适用于移动设备。我不喜欢造型，但我想我可以自己解决它。这也是最好的方法吗？
我有一个jsfiddle here。
function myFunction() {
var x = document.getElementById("myTopnav");
if (x.className === "topnav") {
x.className += " responsive";
} else {
x.className = "topnav";
}
}ul {
list-style-type: none;
margin: 0;
padding: 0;
overflow: hidden;
background-color: #333;
}
li {
float: left;
}
li a,
.dropbtn {
display: inline-block;
color: white;
text-align: center;
padding: 14px 16px;
text-decoration: none;
}
li.dropdown {
display: inline-block;
}
.dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
}
.dropdown-content a {
color: black;
padding: 12px 16px;
text-decoration: none;
display: block;
text-align: left;
}
.dropdown-content a:hover {
background-color: #f1f1f1
}
.dropdown:hover .dropdown-content {
display: block;
}
ul.topnav li a:hover {
background-color: #555;
}
ul.topnav li.icon {
display: none;
}
@media screen and (max-width: 460px) {
ul.topnav li:not(:first-child) {
display: none;
}
ul.topnav li.icon {
float: right;
display: inline-block;
}
}
@media screen and (max-width: 460px) {
ul.topnav.responsive {
position: relative;
}
ul.topnav.responsive li.icon {
position: absolute;
right: 0;
top: 0;
}
ul.topnav.responsive li {
float: none;
display: inline;
}
ul.topnav.responsive li a {
display: block;
text-align: left;
}
}<ul class="topnav" id="myTopnav">
<li><a class="active" href="#home">Home</a>
</li>
<li><a href="#news">News</a>
</li>
<li><a href="#contact">Contact</a>
</li>
<li><a href="#about">About</a>
</li>
<li class="dropdown">
<a href="javascript:void(0)" class="dropbtn">Dropdown</a>
<div class="dropdown-content">
<a href="#">Link 1</a>
<a href="#">Link 2</a>
<a href="#">Link 3</a>
</div>
</li>
<li class="icon">
<a href="javascript:void(0);" style="font-size:15px;" onclick="myFunction()">☰</a>
</li>
</ul>
<div style="padding-left:16px">
<h2>Responsive Topnav Example</h2>
<p>Resize the browser window to see how it works.</p>
</div>
答案 0 :(得分：0)
你可以使用meterialised drop down ....
例如 CSS
$grey: #9e9e9e;
$plum: #8e44ad;
$shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.16), 0 2px 8px 0 rgba(0, 0, 0, 0.12);
h1, a, li {
font-family: Roboto, sans-serif;
}
h1 {
font-size: 26px;
background: lighten($plum, 5%);
color: white;
padding: 40px 0 40px 20%;
margin-bottom: 50px;
}
a, li {
color: darken($grey, 20%);
text-decoration: none;
}
.nav {
margin-left: 20%;
> li {
display: inline-block;
padding: 1em 18px;
cursor: pointer;
&:hover {
background: lighten($grey, 30%);
}
}
}
.drop {
position: relative;
ul {
position: absolute;
left: 0;
top: 3em;
transition: all 0.3s ease;
transform: scale(0);
transform-origin: 0 0;
box-shadow: $shadow;
li {
display: block;
width: 100%;
a {
width: 100%;
padding: 1em 18px;
display: inline-block;
white-space: pre;
box-sizing: border-box;
&:hover {
background: lighten($grey, 30%);
}
}
}
}
&:hover {
ul {
transform: scale(1);
}
}
}
//---------------------------------------------
.follow {
width: 42px;
height: 42px;
border-radius: 50px;
background: #03A9F4;
display: block;
margin: 300px auto 0;
white-space: nowrap;
padding: 13px;
box-sizing: border-box;
color: white;
transition: all 0.2s ease;
font-family: Roboto, sans-serif;
text-decoration: none;
box-shadow: 0 5px 6px 0 rgba(0,0,0,0.2);
i {
margin-right: 20px;
transition: margin-right 0.2s ease;
}
&:hover {
width: 134px;
i {
margin-right: 10px;
}
}
}
@media screen and (max-width: 800px) {
.follow {
margin: 400px auto 0;
}
}
HTML
<h1>Material Design CSS Only Dropdown Menu</h1>
<ul class="nav">
<li><a href="http://www.g.com">Home</a></li>
<li><a href="http://www.g.com">Portfolio</a></li>
<li class="drop">Drop
<ul>
<li><a href="http://www.g.com">Art</a></li>
<li><a href="http://www.g.com">Coding</a></li>
<li><a href="http://www.g.com">Design</a></li>
<li><a href="http://www.g.com">Web Development</a></li>
</ul>
</li>
<li><a href="http://www.g.com">Contact</a></li>
</ul>
<a class="follow" href="https://twitter.com/mildrenben" target="_blank"><i class="fa fa-twitter"></i>Follow Me</a>
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">
<link href='http://fonts.googleapis.com/css?family=Roboto:400,500,300,700' rel='stylesheet' type='text/css'>
答案 1 :(得分：0)
我建议您查看Bootstrap。如果您不是造型的粉丝并且他们的网站上有navbar section的良好文档，那将会有所帮助。不幸的是，他们没有“快速响应能力”。你正在寻找，但我找到了一个JSFiddle，有人为此添加了CSS。
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *CellIdentifier = @"cell";
customCell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
customCell.oneYear.tag = indexPath.row;
customCell.threeYearButton.tag = indexPath.row + 50;
[customCell.oneYear addTarget:self
action:@selector(oneYearButtonAction)
forControlEvents:UIControlEventTouchUpInside];
[customCell.threeYearButton addTarget:self
action:@selector(threeYearButtonAction)
forControlEvents:UIControlEventTouchUpInside];
[customCell setSelectionStyle:UITableViewCellSelectionStyleNone];
.sidebar-nav {
padding: 9px 0;
}
.dropdown-menu .sub-menu {
left: 100%;
position: absolute;
top: 0;
visibility: hidden;
margin-top: -1px;
}
.dropdown-menu li:hover .sub-menu {
visibility: visible;
}
.dropdown:hover .dropdown-menu {
display: block;
}
.nav-tabs .dropdown-menu, .nav-pills .dropdown-menu, .navbar .dropdown-menu {
margin-top: 0;
}
.navbar .sub-menu:before {
border-bottom: 7px solid transparent;
border-left: none;
border-right: 7px solid rgba(0, 0, 0, 0.2);
border-top: 7px solid transparent;
left: -7px;
top: 10px;
}
.navbar .sub-menu:after {
border-top: 6px solid transparent;
border-left: none;
border-right: 6px solid #fff;
border-bottom: 6px solid transparent;
left: 10px;
top: 11px;
left: -6px;
}
希望这有帮助。