如何获取下拉菜单以显示Google地图?

时间:2018-09-05 01:54:03

标签: html css google-maps z-index

我试图在屏幕的右上角找到一个菜单,以下拉到Google地图上。我可以将其下拉,但它隐藏在Google地图的后面。

我一直在寻找并一直在寻找有关z-index的帖子,所以我假设它与此有关,但是我无法使其工作。我能完成的最好的工作就是显示下拉菜单,有点透明。

如果我将地图的z-index更改为-1,则菜单将起作用,但随后我将失去地图的功能。我还可以将下拉菜单的位置更改为绝对位置,然后将其放下,但是然后将其下拉到左侧,这不是我想要的。

我不确定我在做什么错。任何帮助是极大的赞赏。

谢谢

nav {
    text-align: center;
    width: 100%;
    height: 75px;
    background-color: #636363;
}
nav img {
    float: left;
    padding: 20px 20px;
}
nav span {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 20px;
    color: #ffffff;
    width: 400px;
}
nav ul {
    float: right;
}
nav ul li {
    float: left;
    list-style: none;
    position: relative;
}
nav ul li a {
    display: block;
    font-family: Arial, Helvetica, sans-serif;
    color: #ffffff;
    font-size: 28px;
    padding: 15px 14px;
    text-decoration: none;
    padding: 10px 10px 15px 0px;
    
}
nav ul li ul {
    display: none;
    position: absolute;
    background-color: #636363;
    padding: 10px;
    right: 0;
    border-radius: 0px 0px 4px 4px;
}
nav ul li:hover ul{
    display: block;
    
}
nav ul li ul li {
    width: 150px;
    border-radius: 4px;
    position: relative;
}
nav ul li ul li a  {
    padding: 8px 14px;
}

nav ul li ul li a:hover {
    background-color: #585656;
}

/* style the map box */
#map{
	  width:100%;
    height:500px;
}
<!DOCTYPE html>
<html>

<head>
	<title>Fargo Food Trucks</title>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<link rel="stylesheet" type="text/css" href="style.css">
</head>

<body>

<!-- Menu with dropdowns -->

<nav>
	<span>Fargo Food Trucks</span>
	<img src="images/badlogo.png" alt="">
	<ul>
		<li><a href="#">Menu</a>
		<ul>
			<li><a href="#">test</a></li>
			<li><a href="#">test</a></li>
			<li><a href="#">test</a></li>
			<li><a href="#">test</a></li>
		</ul>
		</li>
	</ul>
</nav>


<!-- map		-->
<div " id="map" >

<script>
	function startMap() {
		var location= {lat: 46.879603, lng: -96.787903};
    	var map=new google.maps.Map(document.getElementById("map"),{
    	zoom:13,
    	center: location
	});
    	var marker = new google.maps.Marker({
    		position: location,
    		map: map
    	});

}
</script>

<script async defer src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBjEzeWaDuillu5nCJnDug6ITpNiqt9I8Y&callback=startMap"></script>

</div>
</body>
</html>

3 个答案:

答案 0 :(得分:1)

在选择器处:nav ul li:hover ul

nav ul li:hover ul{
    display: flex;
    position: absolute;
    z-index: 2000;
    top: 58px; 
}

nav {
    text-align: center;
    width: 100%;
    height: 75px;
    background-color: #636363;
}
nav img {
    float: left;
    padding: 20px 20px;
}
nav span {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 20px;
    color: #ffffff;
    width: 400px;
}
nav ul {
    float: right;
}
nav ul li {
    float: left;
    list-style: none;
    position: relative;
}
nav ul li a {
    display: block;
    font-family: Arial, Helvetica, sans-serif;
    color: #ffffff;
    font-size: 28px;
    padding: 15px 14px;
    text-decoration: none;
    padding: 10px 10px 15px 0px;
    
}
nav ul li a.targetDrop{
    float: right;
}
nav ul li ul {
    display: none;
    position: absolute;
    background-color: #636363;
    padding: 10px;
    right: 0;
    border-radius: 0px 0px 4px 4px;
}
nav ul li:hover ul{
    display: flex;
    position: absolute;
    z-index: 2000;
    top: 58px;
    
}
nav ul li ul li {
    width: 150px;
    border-radius: 4px;
    position: relative;
}
nav ul li ul li a  {
    padding: 8px 14px;
}

nav ul li ul li a:hover {
    background-color: #585656;
}

/* style the map box */
#map{
	  width:100%;
    height:500px;
}
<!DOCTYPE html>
<html>

<head>
	<title>Fargo Food Trucks</title>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<link rel="stylesheet" type="text/css" href="style.css">
</head>

<body>

<!-- Menu with dropdowns -->

<nav>
	<span>Fargo Food Trucks</span>
	<img src="images/badlogo.png" alt="">
	<ul>
		<li><a href="#" class="targetDrop">Menu</a>
		<ul>
			<li><a href="#">test</a></li>
			<li><a href="#">test</a></li>
			<li><a href="#">test</a></li>
			<li><a href="#">test</a></li>
		</ul>
		</li>
	</ul>
</nav>


<!-- map		-->
<div " id="map" >

<script>
	function startMap() {
		var location= {lat: 46.879603, lng: -96.787903};
    	var map=new google.maps.Map(document.getElementById("map"),{
    	zoom:13,
    	center: location
	});
    	var marker = new google.maps.Marker({
    		position: location,
    		map: map
    	});

}
</script>

<script async defer src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBjEzeWaDuillu5nCJnDug6ITpNiqt9I8Y&callback=startMap"></script>

</div>
</body>
</html>

答案 1 :(得分:0)

您可以简单地添加以下行:

ILevellable

始终尝试将您的nav ul { z-index: 1; /* To keep the menu on top of the map */ } 保持在最低水平。

This codepen显示了添加该行后的外观,您可以看到现在您不会失去任何地图功能。

所以您的CSS看起来像这样:

z-index

答案 2 :(得分:0)

为nav ul li:hover ul更改以下内容:

display: block;
z-index: 1;

第一个规则使子元素彼此重叠放置,就像被堆叠的块一样。第二条规则使元素呈现在z索引较低的所有其他元素之上。

如果您想进一步了解展示广告,请访问此链接:

https://css-tricks.com/almanac/properties/d/display/

如果您想进一步了解z-index,请访问此链接:

https://developer.mozilla.org/en-US/docs/Web/CSS/z-index