javascript - 谷歌地图api自定义折线

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我想创建两个输入框，它们将自动完成位置，然后创建一个提交按钮，单击该按钮将在 map 上的两个输入位置之间创建一条折线。我的代码完美地完成了自动完成，但无法在单击提交按钮时标记站点之间的线。请帮忙。帮助我调试。

<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&libraries=places"></script>

<script>
function initialize() {
   var mapOptions = {
center: new google.maps.LatLng(-33.8688, 151.2195),
zoom: 13
};
     var map = new google.maps.Map(document.getElementById('map-canvas'),


 mapOptions);

  var input = /** @type {HTMLInputElement} */(
      document.getElementById('pac-input'));

  var input1=(document.getElementById('pac-input1'));

  //var types = document.getElementById('type-selector');
  map.controls[google.maps.ControlPosition.TOP_LEFT].push(input);
  map.controls[google.maps.ControlPosition.TOP_LEFT].push(input1);

  var autocomplete = new google.maps.places.Autocomplete(input);
  autocomplete.bindTo('bounds', map);

  var autocomplete = new google.maps.places.Autocomplete(input1);
  autocomplete.bindTo('bounds', map);

  var infowindow = new google.maps.InfoWindow();
  var marker = new google.maps.Marker({
    map: map,
    anchorPoint: new google.maps.Point(0, -29)
  });

   var polyOptions = {
    strokeColor: '#000000',
    strokeOpacity: 1.0,
    strokeWeight: 3
  };
  poly = new google.maps.Polyline(polyOptions);
  poly.setMap(map);
google.maps.event.addListener(submit, 'click', addLatLng);


/**
 * Handles click events on a map, and adds a new point to the Polyline.
 * @param {google.maps.MouseEvent} event
 */
function addLatLng(event) {

  var path = poly.getPath();

  // Because path is an MVCArray, we can simply append a new coordinate
  // and it will automatically appear.
  path.push(event.latLng);

  // Add a new marker at the new plotted point on the polyline.
  var marker = new google.maps.Marker({
    position: event.latLng,
    title: '#' + path.getLength(),
    map: map
  });
}


  google.maps.event.addListener(autocomplete, 'place_changed', function() {
    infowindow.close();
    marker.setVisible(false);
    var place = autocomplete.getPlace();
    if (!place.geometry) {
      return;
    }

    // If the place has a geometry, then present it on a map.
    if (place.geometry.viewport) {
      map.fitBounds(place.geometry.viewport);
    } else {
      map.setCenter(place.geometry.location);
      map.setZoom(17);  // Why 17? Because it looks good.
    }
    marker.setIcon(/** @type {google.maps.Icon} */({
      url: place.icon,
      size: new google.maps.Size(71, 71),
      origin: new google.maps.Point(0, 0),
      anchor: new google.maps.Point(17, 34),
      scaledSize: new google.maps.Size(35, 35)
    }));
    marker.setPosition(place.geometry.location);
    marker.setVisible(true);

    var address = '';
    if (place.address_components) {
      address = [
        (place.address_components[0] && place.address_components[0].short_name || ''),
        (place.address_components[1] && place.address_components[1].short_name || ''),
        (place.address_components[2] && place.address_components[2].short_name || '')
      ].join(' ');
    }

    infowindow.setContent('<div><strong>' + place.name + '</strong><br>' + address);
    infowindow.open(map, marker);
  });


 }

google.maps.event.addDomListener(window, 'load', initialize);

</script> 

我的 html 文件的正文如下:

<input id="pac-input" class="controls" type="text" placeholder="Enter a location">
<input id="pac-input1" class="controls" type="text" placeholder="Enter another location">

<div id="type-selector" class="controls">
  <input  type="submit" name="submit" value="SUBMIT">
</div>
<div id="map-canvas"></div>

Answer 1

我在您的代码中遇到了 JavaScript 错误:Uncaught ReferenceError:提交未定义

google.maps.event.addListener(submit, 'click', addLatLng);

应该是:

google.maps.event.addListener(document.getElementById('submit'), 'click', addLatLng);

(但事实证明你不需要那个)

一旦我解决了这个问题，我就只能得到一个标记。因为你只有一个自动完成功能:

var autocomplete = new google.maps.places.Autocomplete(input);
autocomplete.bindTo('bounds', map);

var autocomplete = new google.maps.places.Autocomplete(input1);
autocomplete.bindTo('bounds', map);

应该是:

var autocomplete = new google.maps.places.Autocomplete(input);
autocomplete.bindTo('bounds', map);

var autocomplete1 = new google.maps.places.Autocomplete(input1);
autocomplete.bindTo('bounds', map);

那么您需要一个用于 autocomplete1 的“place_changed”监听器。

如果您希望这些位置成为折线的末端，则必须将它们添加到路径中:

poly.getPath().setAt(0, marker.getPosition());

working fiddle

工作代码片段:

function initialize() {
    var mapOptions = {
        center: new google.maps.LatLng(-33.8688, 151.2195),
        zoom: 13
    };
    var map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);

    var input = /** @type {HTMLInputElement} */
    (
    document.getElementById('pac-input'));

    var input1 = (document.getElementById('pac-input1'));

    //var types = document.getElementById('type-selector');
    map.controls[google.maps.ControlPosition.TOP_LEFT].push(input);
    map.controls[google.maps.ControlPosition.TOP_LEFT].push(input1);

    var autocomplete = new google.maps.places.Autocomplete(input);
    autocomplete.bindTo('bounds', map);

    var autocomplete1 = new google.maps.places.Autocomplete(input1);
    autocomplete.bindTo('bounds', map);

    var infowindow = new google.maps.InfoWindow();
    var marker = new google.maps.Marker({
        map: map,
        anchorPoint: new google.maps.Point(0, -29)
    });

    var marker1 = new google.maps.Marker({
        map: map,
        anchorPoint: new google.maps.Point(0, -29)
    });
    var polyOptions = {
        strokeColor: '#000000',
        strokeOpacity: 1.0,
        strokeWeight: 3
    };
    poly = new google.maps.Polyline(polyOptions);
    poly.setMap(map);

    google.maps.event.addListener(autocomplete, 'place_changed', function () {
        infowindow.close();
        marker.setVisible(false);
        var place = autocomplete.getPlace();
        if (!place.geometry) {
            return;
        }

        // If the place has a geometry, then present it on a map.
        if (place.geometry.viewport) {
            map.fitBounds(place.geometry.viewport);
        } else {
            map.setCenter(place.geometry.location);
            map.setZoom(17); // Why 17? Because it looks good.
        }
        marker.setIcon( /** @type {google.maps.Icon} */ ({
            url: place.icon,
            size: new google.maps.Size(71, 71),
            origin: new google.maps.Point(0, 0),
            anchor: new google.maps.Point(17, 34),
            scaledSize: new google.maps.Size(35, 35)
        }));
        marker.setPosition(place.geometry.location);
        marker.setVisible(true);
        poly.getPath().setAt(0, marker.getPosition());

        var address = '';
        if (place.address_components) {
            address = [
            (place.address_components[0] && place.address_components[0].short_name || ''), (place.address_components[1] && place.address_components[1].short_name || ''), (place.address_components[2] && place.address_components[2].short_name || '')].join(' ');
        }

        infowindow.setContent('<div><strong>' + place.name + '</strong><br>' + address);
        infowindow.open(map, marker);
    });

    google.maps.event.addListener(autocomplete1, 'place_changed', function () {
        infowindow.close();
        marker1.setVisible(false);
        var place = autocomplete1.getPlace();
        if (!place.geometry) {
            return;
        }

        // If the place has a geometry, then present it on a map.
        if (place.geometry.viewport) {
            map.fitBounds(place.geometry.viewport);
        } else {
            map.setCenter(place.geometry.location);
            map.setZoom(17); // Why 17? Because it looks good.
        }
        marker1.setIcon( /** @type {google.maps.Icon} */ ({
            url: place.icon,
            size: new google.maps.Size(71, 71),
            origin: new google.maps.Point(0, 0),
            anchor: new google.maps.Point(17, 34),
            scaledSize: new google.maps.Size(35, 35)
        }));
        marker1.setPosition(place.geometry.location);
        marker1.setVisible(true);
        poly.getPath().setAt(1, marker1.getPosition());

        var address = '';
        if (place.address_components) {
            address = [
            (place.address_components[0] && place.address_components[0].short_name || ''), (place.address_components[1] && place.address_components[1].short_name || ''), (place.address_components[2] && place.address_components[2].short_name || '')].join(' ');
        }

        infowindow.setContent('<div><strong>' + place.name + '</strong><br>' + address);
        infowindow.open(map, marker1);
    });
}

google.maps.event.addDomListener(window, 'load', initialize);

html, body, #map-canvas {
    width: 100%;
    height: 100%;
}

<script src="https://maps.googleapis.com/maps/api/js?libraries=places"></script>
<input id="pac-input" class="controls" type="text" placeholder="Enter a location" />
<input id="pac-input1" class="controls" type="text" placeholder="Enter another location" />
<div id="type-selector" class="controls">
    <input type="submit" name="submit" id="submit" value="SUBMIT" />
</div>
<div id="map-canvas"></div>