将参数传递给JavaScript中的url回调函数

Pau*_*ine 5 javascript google-maps callback

我有以下一段代码,当用户单击“提交”按钮时,它将显示一个地图。

目前,函数initialize()没有任何参数,并且地图以固定的纬度和经度为中心。我希望能够将纬度和经度作为参数,以便地图以此为中心。

我已经有了经度和纬度,因此获取这些参数不是问题;我的问题是我不知道如何将它们传递给函数。

完整代码:

<!DOCTYPE html>
<html>
    <head>
      <link rel="stylesheet" type="text/css" href="stylesheet.css">
      <title>Simple Map</title>
      <meta name="viewport" content="initial-scale=1.0">
      <meta charset="utf-8">
    </head>
<body>
    <div id="map">

        <button type="button" onclick="loadScript()">submit</button>

    </div>


    <script>

        function initialize() {
            var latlng = new google.maps.LatLng(-34.397, 150.644);
            var myOptions = {
                zoom: 10,
                center: latlng,
                mapTypeId: google.maps.MapTypeId.ROADMAP
            };
            var map = new google.maps.Map(document.getElementById("map"),
        myOptions);
        }


        function loadScript() {
            var myKey = "myAPIKey";
            var script = document.createElement('script');
            script.type = 'text/javascript';
            script.src = "https://maps.googleapis.com/maps/api/js?key=" + myKey + "&sensor=false&callback=initialize";
            document.body.appendChild(script);
        }

    </script>

</body>
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仅JavaScript:

        function initialize() {
            var latlng = new google.maps.LatLng(-34.397, 150.644);
            var myOptions = {
                zoom: 10,
                center: latlng,
                mapTypeId: google.maps.MapTypeId.ROADMAP
            };
            var map = new google.maps.Map(document.getElementById("map"),
        myOptions);
        }


        function loadScript() {
            var myKey = "myAPIKey";
            var script = document.createElement('script');
            script.type = 'text/javascript';
            script.src = "https://maps.googleapis.com/maps/api/js?key=" + myKey + "&sensor=false&callback=initialize";
            document.body.appendChild(script);
        }
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小智 4

只需在脚本之前启动变量即可。在“loadScript”函数中更新变量并在“initialize”函数中使用它们。对我来说,它有效。

<script>
    var string = "";   // initialize variables here. You need var lat and var lng 

    function initialize() {
        var latlng = new google.maps.LatLng(-34.397, 150.644);
        console.log(string);  // just checking, if it does work in "initialize" function
        var myOptions = { 
            zoom: 10,
            center: latlng,
            mapTypeId: google.maps.MapTypeId.ROADMAP
        };
        var map = new google.maps.Map(document.getElementById("map"),
    myOptions);
    }


    function loadScript() {
        var myKey = "myAPIKey";
        var script = document.createElement('script');
        script.type = 'text/javascript';
        string = "hey it works";   //////////// here take the coordinates
        script.src = "https://maps.googleapis.com/maps/api/js?&sensor=false&callback=initialize";
        document.body.appendChild(script);
    }

</script>
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另外,我认为稍后可以使用以下命令更改位置:

map.setCenter(new google.maps.LatLng( 45, 19 ) );
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我希望它有帮助