Google使用多个字符映射标记标签

Question

我正在尝试将4个字符的标签(例如"A123")添加到Google地图标记中,该标记具有使用自定义路径定义的宽图标.

var marker = new google.maps.Marker({
  position: latLon,
  label: { text: 'A123' },
  map: map,
  icon: {
    path: 'custom icon path',
    fillColor: '#000000',
    labelOrigin: new google.maps.Point(26.5, 20),
    anchor: new google.maps.Point(26.5, 43)
    scale: 1,
  }
});

所述标识标签API被限制为单个字符,所以只示出了具有在上面的例子中"A"的标记物.我尝试使用chrome开发人员工具来破解由gmaps创建的html并恢复更长的标签.它完美显示,无需修改所需的CSS,所以我只需要找到一种方法来恢复谷歌地图剥离的其他标签字符.

我提出了Google地图问题,要求取消此限制.请考虑通过访问上面的链接投票支持Google问题并主演该问题以鼓励Google修复它 - 谢谢!

但与此同时,我是否可以使用一种解决方法来删除一个char限制？

有没有办法我可以创建google.maps.Marker的自定义扩展程序来显示我更长的标签？

Answer 1

您可以将MarkerWithLabel与SVG图标一起使用.

更新: Google Maps Javascript API v3现在本身支持MarkerLabel中的多个字符

概念证明小提琴(你没有提供你的图标,所以我做了一个)

注意:此修复程序解决了重叠标记上的标签问题,感谢robd在评论中提出的问题.

代码段:

function initMap() {
  var latLng = new google.maps.LatLng(49.47805, -123.84716);
  var homeLatLng = new google.maps.LatLng(49.47805, -123.84716);

  var map = new google.maps.Map(document.getElementById('map_canvas'), {
    zoom: 12,
    center: latLng,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  });

  var marker = new MarkerWithLabel({
    position: homeLatLng,
    map: map,
    draggable: true,
    raiseOnDrag: true,
    labelContent: "ABCD",
    labelAnchor: new google.maps.Point(15, 65),
    labelClass: "labels", // the CSS class for the label
    labelInBackground: false,
    icon: pinSymbol('red')
  });

  var iw = new google.maps.InfoWindow({
    content: "Home For Sale"
  });
  google.maps.event.addListener(marker, "click", function(e) {
    iw.open(map, this);
  });
}

function pinSymbol(color) {
  return {
    path: 'M 0,0 C -2,-20 -10,-22 -10,-30 A 10,10 0 1,1 10,-30 C 10,-22 2,-20 0,0 z',
    fillColor: color,
    fillOpacity: 1,
    strokeColor: '#000',
    strokeWeight: 2,
    scale: 2
  };
}
google.maps.event.addDomListener(window, 'load', initMap);

html,
body,
#map_canvas {
  height: 500px;
  width: 500px;
  margin: 0px;
  padding: 0px
}
.labels {
  color: white;
  background-color: red;
  font-family: "Lucida Grande", "Arial", sans-serif;
  font-size: 10px;
  text-align: center;
  width: 30px;
  white-space: nowrap;
}

<script src="https://maps.googleapis.com/maps/api/js?sensor=false&libraries=geometry,places&ext=.js"></script>
<script src="https://cdn.rawgit.com/googlemaps/v3-utility-library/master/markerwithlabel/src/markerwithlabel.js"></script>
<div id="map_canvas" style="height: 400px; width: 100%;"></div>

Answer 2

首先,感谢代码作者!

我在google搜索时找到了以下链接,它非常简单,效果最好.除非SVG被弃用,否则永远不会失败.

https://codepen.io/moistpaint/pen/ywFDe/

这里的代码中有一些js加载错误,但它完全适用于提供的codepen.io链接.

var mapOptions = {
    zoom: 16,
    center: new google.maps.LatLng(-37.808846, 144.963435)
  };
  map = new google.maps.Map(document.getElementById('map-canvas'),
      mapOptions);


var pinz = [
    {
        'location':{
            'lat' : -37.807817,
            'lon' : 144.958377
        },
        'lable' : 2
    },
    {
        'location':{
            'lat' : -37.807885,
            'lon' : 144.965415
        },
        'lable' : 42
    },
    {
        'location':{
            'lat' : -37.811377,
            'lon' : 144.956596
        },
        'lable' : 87
    },
    {
        'location':{
            'lat' : -37.811293,
            'lon' : 144.962883
        },
        'lable' : 145
    },
    {
        'location':{
            'lat' : -37.808089,
            'lon' : 144.962089
        },
        'lable' : 999
    },
];

 

for(var i = 0; i <= pinz.length; i++){
   var image = 'data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2238%22%20height%3D%2238%22%20viewBox%3D%220%200%2038%2038%22%3E%3Cpath%20fill%3D%22%23808080%22%20stroke%3D%22%23ccc%22%20stroke-width%3D%22.5%22%20d%3D%22M34.305%2016.234c0%208.83-15.148%2019.158-15.148%2019.158S3.507%2025.065%203.507%2016.1c0-8.505%206.894-14.304%2015.4-14.304%208.504%200%2015.398%205.933%2015.398%2014.438z%22%2F%3E%3Ctext%20transform%3D%22translate%2819%2018.5%29%22%20fill%3D%22%23fff%22%20style%3D%22font-family%3A%20Arial%2C%20sans-serif%3Bfont-weight%3Abold%3Btext-align%3Acenter%3B%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%3E' + pinz[i].lable + '%3C%2Ftext%3E%3C%2Fsvg%3E';

  
   var myLatLng = new google.maps.LatLng(pinz[i].location.lat, pinz[i].location.lon);
   var marker = new google.maps.Marker({
      position: myLatLng,
      map: map,
      icon: image
  });
}

html, body, #map-canvas {
  height: 100%;
  margin: 0px;
  padding: 0px
}

<div id="map-canvas"></div>
<script async defer src="https://maps.googleapis.com/maps/api/js?key=AIzaSyDtc3qowwB96ObzSu2vvjEoM2pVhZRQNSA&signed_in=true&callback=initMap&libraries=drawing,places"></script>

您只需要对SVG html进行uri编码,并在for循环中的"data:image/svg + xml"之后替换图像变量中的那个.

对于uri编码,您可以使用uri-encoder-decoder

您可以先解码现有的svg代码,以便更好地理解所写的内容.

Answer 3

好的,这是我提出的一个解决方案,它很混乱.

我使用fontFamily标签属性将完整的标签文本放入div中.然后我使用querySelectorAll来匹配生成的样式属性以提取引用并在加载地图后重写标记:

var label = "A123";
var marker = new google.maps.Marker({
  position: latLon,
  label: {
    text: label,
    // Add in the custom label here
    fontFamily: 'Roboto, Arial, sans-serif, custom-label-' + label
  },
  map: map,
  icon: {
    path: 'custom icon path',
    fillColor: '#000000',
    labelOrigin: new google.maps.Point(26.5, 20),
    anchor: new google.maps.Point(26.5, 43), 
    scale: 1
  }
});

google.maps.event.addListener(map, 'idle', function() {
  var labels = document.querySelectorAll("[style*='custom-label']")
  for (var i = 0; i < labels.length; i++) {
    // Retrieve the custom labels and rewrite the tag content
    var matches = labels[i].getAttribute('style').match(/custom-label-(A\d\d\d)/);
    labels[i].innerHTML = matches[1];
  }
});

这看起来很脆弱.有什么方法不那么可怕吗？