标记未显示在谷歌地图中答案

【问题标题】：Markers are not showing in google map标记未显示在谷歌地图中
【发布时间】：2020-06-08 20:59:46
【问题描述】：

我正在尝试在 larvel 项目中的 Google Map 中的多个位置显示标记。我在控制器中添加了代码并将locations 传递给查看页面。

以下是我的刀片中的代码

@extends('user.layout.app')

@section('content')
    <script src="{{ url('js/user/location.js') }}"></script>
    <div class="container-fluid add-location">
        <div class="row">
            <div class="col-md-12">
                <div class="card">
                    <form method="post" action="" name="clinicssview" id="clinicssview" enctype="multipart/form-data" novalidate>
                        {{ csrf_field() }}
                        <div class="card-header">
                            <h4 class="card-title"> View Clinics </h4>
                        </div>
                        @if(!empty($errors->all()))
                            <div class="row"> 
                                @foreach ($errors->all() as $error)
                                    <div class="col-lg-12">
                                        <div class="alert alert-danger"> <span>{{ $error }}</span> </div>
                                    </div>
                                @endforeach 
                            </div>
                        @endif
                        <div class="card-content">
                            <div class="row">
                                <div class="col-xs-12 col-sm-12 col-md-6">
                                    <div class="form-group hide">
                                        <label class="control-label">Location
                                            <star>*</star>
                                        </label>
                                        <input id="pac-input" name="location" class="controls form-control" type="text" placeholder="Search Box">
                                        <!-- <div id="map" height="1000" width="1000"></div> -->
                                    </div>
                                    <h4 >Preview</h4>
                                    <div class="form-group">
                                        <div id="regularMap" class="map"></div>
                                    </div>
                                </div>
                                <div class="col-xs-12 col-sm-12 col-md-12">
                                    <div class="form-group">
                                        <label class="control-label">Clinic Name
                                            <star>*</star>
                                        </label>
                                        <input disabled id="user_name" name="user_name" class="controls form-control" type="text" placeholder="Clinc Name" value="{{$clinic->clinicName}}">
                                    </div>
                                </div>

                                <div class="col-xs-12 col-sm-12 col-md-12">
                                    <div class="form-group">
                                        <label class="control-label">Contact First Name
                                            <star>*</star>
                                        </label>
                                        <input disabled id="contact_fname" name="contact_fname" class="controls form-control" type="text" placeholder="Contact First Name" value="{{$clinic->clinicFname}}">
                                    </div>
                                </div>

                                <div class="col-xs-12 col-sm-12 col-md-12">
                                    <div class="form-group">
                                        <label class="control-label">Contact Second Name
                                            <star>*</star>
                                        </label>
                                        <input disabled id="contact_sname" name="contact_sname" class="controls form-control" type="text" placeholder="Contact Second Name" value="{{$clinic->clinicLname}}">
                                    </div>
                                </div>

                                <div class="col-xs-12 col-sm-12 col-md-12">
                                    <div class="form-group">
                                        <label class="control-label">Contact Address
                                            <star>*</star>
                                        </label>
                                        <input disabled id="contact_address" name="contact_adress" class="controls form-control" type="text" placeholder="Contact Address" value="{{$clinic->clinicAddress}}">
                                    </div>
                                </div>

                                <div class="col-xs-12 col-sm-12 col-md-12">
                                    <div class="form-group">
                                        <label class="control-label">Contact City
                                            <star>*</star>
                                        </label>
                                        <input disabled id="contact_city" name="contact_city" class="controls form-control" type="text" placeholder="City" value="{{$clinic->clinicCity}}">
                                    </div>
                                </div>

                                <div class="col-xs-12 col-sm-12 col-md-12">
                                    <div class="form-group">
                                        <label class="control-label">Contact State
                                            <star>*</star>
                                        </label>
                                        <input disabled id="contact_state" name="contact_state" class="controls form-control" type="text" placeholder="State" value="{{$clinic->clinicState}}">
                                    </div>
                                </div>

                                <div class="col-xs-12 col-sm-12 col-md-12">
                                    <div class="form-group">
                                        <label class="control-label">Clinic Zip
                                            <star>*</star>
                                        </label>
                                        <input disabled id="zip" name="zip" class="controls form-control" type="text" placeholder="Zip" value="{{$clinic->clinicZip}}">
                                    </div>
                                </div>

                                <div class="col-xs-12 col-sm-12 col-md-12">
                                    <div class="form-group{{ $errors->has('email') ? ' has-error' : '' }}">
                                        <label for="email" class="control-label">Email
                                            <star>*</star>
                                        </label>
                                        <input disabled id="email" type="email" class="form-control" name="email" placeholder="Email" value="{{$clinic->clinicEmail}}">
                                    </div>
                                </div>

                                <div class="col-xs-12 col-sm-12 col-md-12">
                                    <div class="form-group">
                                        <label class="control-label">Clinic Phone Number
                                            <star>*</star>
                                        </label>
                                        <input disabled id="phone" name="phone" class="controls form-control" type="text" placeholder="Phone Number" value="{{$clinic->clinicPhone}}">
                                    </div>
                                </div>

                                <div class="col-xs-12 col-sm-12 col-md-12">
                                    <div class="form-group">
                                        <label class="control-label">Clinic Website
                                            <star>*</star>
                                        </label>
                                        <input disabled id="clinic_website" name="clinic_website" class="controls form-control" type="text" placeholder="Website" value="{{$clinic->clinicURL}}">
                                    </div>
                                </div>
                            </div>
                            <div class="row"></div>   
                    </form>
                </div>
            </div>
        </div>
    </div>

    <script async defer src="https://maps.googleapis.com/maps/api/jskey=API_KEY">
    </script>
    <script type="text/javascript">
    var locations = <?php echo $locations ?>;
    var map = new google.maps.Map(document.getElementById('regularMap'), {
        zoom: 10,
        center: new google.maps.LatLng(-33.92, 151.25),
        mapTypeId: google.maps.MapTypeId.ROADMAP
    });

    var infowindow = new google.maps.InfoWindow();

    var marker, i;
    for (i = 0; i < locations.length; i++) {
        marker = new google.maps.Marker({
            position: new google.maps.LatLng(locations[i]['locationLat'], locations[i]['locationLong']),
            visible: true,
            map: map
        });
        marker.setMap(map);
    }
</script>
@endsection

但标记未显示在位置中。我正在从数据库中加载纬度和经度。请帮帮我

【问题讨论】：

将你的谷歌地图和标记的javascript代码放入window.onload = function(e){ }函数中
你能给我看看吗
请提供console.log(locations); 的输出。这确实是要调试的第一件事。附带说明一下，marker.setMap(map) 是不必要的，因为您已经在标记选项中使用了map: map。另外，请编辑您的问题以包含控制台中的任何 JS 错误。

标签： javascript laravel google-maps

【解决方案1】：

你的谷歌地图和标记的javascript代码应该在window.onload函数内

<script type="text/javascript">
    var locations = <?php echo $locations ?>;

    window.onload = function(e){

        var map = new google.maps.Map(document.getElementById('regularMap'), {
            zoom: 10,
            center: new google.maps.LatLng(-33.92, 151.25),
            mapTypeId: google.maps.MapTypeId.ROADMAP
        });

        var infowindow = new google.maps.InfoWindow();

        var marker, i;
        for (i = 0; i < locations.length; i++) {
            marker = new google.maps.Marker({
                position: new google.maps.LatLng(locations[i]['locationLat'], locations[i]['locationLong']),
                visible: true,
                map: map
            });
            marker.setMap(map);
        }

     }   
</script>

更新： https://developers.google.com/maps/documentation/javascript/adding-a-google-map

你也可以在你的谷歌库加载中使用回调参数。

     <script>
     function initMap (){

            var map = new google.maps.Map(document.getElementById('regularMap'), {
                zoom: 10,
                center: new google.maps.LatLng(-33.92, 151.25),
                mapTypeId: google.maps.MapTypeId.ROADMAP
            });

            var infowindow = new google.maps.InfoWindow();

            var marker, i;
            for (i = 0; i < locations.length; i++) {
                marker = new google.maps.Marker({
                    position: new google.maps.LatLng(locations[i]['locationLat'], locations[i]['locationLong']),
                    visible: true,
                    map: map
                });
                marker.setMap(map);
            }

         }   
</script>

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

【讨论】：