Question

当我使用特定的坐标加载我的谷歌地图导航时，地图不会将显示中心放在我设置的位置。为什么这样做？我该如何解决它？

我的脚本代码：这是一个功能齐全的网页，但是当您将谷歌地图放在手风琴中由于某种原因时，地图的位置不起作用。

<!doctype html> 
<html>
<head>
    <meta http-equiv="content-type" content="text/html; charset=utf-8"/>
    <meta charset = "utf-8">
    <title>London Tour Guide</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.6.3/css/font-awesome.min.css">

    <script src="jquery.js"></script>

    <style>
        div.container { position: absolute; top: 10px; left: 400px; width: 720px; height: 1300px;
            background-color: white; }

        div.content {
            width: 700px; height: 1200px;
            background-color: lightblue; padding: 5px; }

        h1.welcome {font-family: Verdana, sans-serif; color: orangered;
            text-align: center; text-shadow: 2px 2px Grey;
            transition: 4s;}

        h1.stpauls{font-family: Verdana, sans-serif; color: orangered;
            text-align: center;
        }

        h1.welcome:hover{transform: rotateX(360deg); color:yellow; }

        p.medium {
    font-size: 12pt;
    font-family: "Palatino Linotype", "Book Antiqua", Palatino, serif;
    color: #333;
        }

        p.small {
    font-size: 12pt;
    font-family: "Palatino Linotype", "Book Antiqua", Palatino, serif;
    color: #333;
        }

        img {
            display: block;
            margin: auto;
        }


        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 a:hover, .dropdown:hover .dropbtn {
            background-color: red;
        }

        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;
        }


        .dropbtn1 {
            background-color: #4CAF50;
            color: white;
            padding: 16px;
            font-size: 16px;
            border: none;
            cursor: pointer;
        }


        .dropbtn1:hover, .dropbtn1:focus {
            background-color: #3e8e41;
        }


        .dropdown1 {
            position: relative;
            display: inline-block;
        }


        .dropdown1-content {
            display: none;
            position: absolute;
            background-color: #f9f9f9;
            min-width: 160px;
            box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
        }


        .dropdown1-content a {
            color: black;
            padding: 12px 16px;
            text-decoration: none;
            display: block;
        }


        .dropdown1-content a:hover {background-color: #f1f1f1}

        .show{display:block;}

        button.accordion {
            background-color: #eee;
            color: #444;
            cursor: pointer;
            padding: 18px;
            width: 100%;
            border: none;
            text-align: left;
            outline: none;
            font-size: 15px;
            transition: 0.4s;
        }

        button.accordion.active, button.accordion:hover {
            background-color: #ddd;
        }

        div.panel {
            padding: 0 18px;
            display: none;
            background-color: white;
        }

        div.panel.show {
            display: block;
        }




    </style>
</head>
<body>

<div class="container">
<div class = "content">

    <div class = "header">
        <img src = "headerlondon.jpg" alt = "header"></div>

    <ul>
        <li><a class="active" href="Project.html">Home</a></li>
        <li><a href="Map.html">Maps </a></li>
        <li class="dropdown">
            <a href="#" class="travel">Travel <i class="fa fa-caret-down"></i></a>
            <div class="dropdown-content">
                <a href="Bus.html">Bus</a>
                <a href="Taxi.html">Taxi</a>
                <a href="Tube.html">Tube</a>
            </div>
        </li>
        <li class="dropdown">
            <a href="#" class="sightseeing">SightSeeing <i class="fa fa-caret-down"></i></a>
            <div class="dropdown-content">
                <a href="LondonEye.html">London Eye</a>
                <a href="TowerofLondon.html">Tower of London</a>
                <a href="BigBen.html">Big Ben</a>
                <a href="StPaulsCathedral.html">St Pauls Cathedral</a>
                <a href="BuckinghamPalace.html">Buckingham Palace</a>
                <a href="WestMinister.html">WestMinister</a>
            </div>
        </li>
        <li class="dropdown">
            <a href="#" class="Museums">Museums <i class="fa fa-caret-down"></i></a>
            <div class="dropdown-content">
                <a href="BritishMuseum.html">British Museum</a>
                <a href="ScienceMuseum.html">Science Museum</a>
                <a href="NationalHistoryMuseum.html">National History Museumm</a>

            </div>

        </li>
    </ul>

  <h1 class = "stpauls"> St Pauls Cathedral</h1>





    <button class="accordion">Navigation</button>
    <div class="panel">
        <div id="map" style="left:150px;width:60%;height:300px"></div>

        </div>





</div>

    <script>
        var acc = document.getElementsByClassName("accordion");
        var i;

        for (i = 0; i < acc.length; i++) {
            acc[i].onclick = function(){
                this.classList.toggle("active");
                this.nextElementSibling.classList.toggle("show");
            }
        }
    </script>

    <script>
        var acc = document.getElementsByClassName("accordion");
        var i;

        for (i = 0; i < acc.length; i++) {
            acc[i].onclick = function() {
                this.classList.toggle("active");
                this.nextElementSibling.classList.toggle("show");
                google.maps.event.trigger(map, "resize");
            }
        }

        function myMap() {
            var mapCanvas = document.getElementById("map");
            var myCenter = new google.maps.LatLng(51.508742, -0.120850);
            var mapOptions = {
                center: myCenter,
                zoom: 10
            };
            var map = new google.maps.Map(mapCanvas, mapOptions);
            var marker = new google.maps.Marker({
                position: myCenter
            });
            marker.setMap(map);
            setTimeout(function () {
                console.log(1);
                google.maps.event.trigger(map, "resize");
            }, 1000);
        }

        </script>
    <script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyB37us778WYnwNjHftUm3oL2oduV_WOt_E&callback=myMap"></script>

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

Answer 1

我认为你应该在功能之前加载google map api脚本。

Answer 2

我通过向onclick函数添加map.panTo(myCenter);来解决了您的问题（并将mapCanvas和myCenter的声明移到了顶部：

<script>
var mapCanvas = document.getElementById("map");
var myCenter = new google.maps.LatLng(51.508742, -0.12000);

var acc = document.getElementsByClassName("accordion");
var i;
for (i = 0; i < acc.length; i++) {
   acc[i].onclick = function(){
      this.classList.toggle("active");
      this.nextElementSibling.classList.toggle("show");
      //I get a grey block where the map should be unless I add resize here
      google.maps.event.trigger(map, "resize");
      //comment out this line to recreate your issue
      map.panTo(myCenter);
   }
}

var mapOptions = {
     center: myCenter,
     zoom: 16
};
var map = new google.maps.Map(mapCanvas, mapOptions);

var marker = new google.maps.Marker({
  position: myCenter,
});
marker.setMap(map);
setTimeout(function () {
    console.log(1);
    google.maps.event.trigger(map, "resize");
}, 1000);
</script>

看看jsfiddle here
单击“导航”按钮以显示地图。

为什么当我加载谷歌地图时，它不会显示我想要的位置

2 个答案: