Google Maps API JS使用输入字段的多个标记吗？

Question

I want to be able to show multiple markers when I insert something in to searchboxes on the website. Right now I have 3 input fields which I want to increase. This is what I currently have, I have tried storing multiple searchBox values in a var like so: var markers = searchBox.getPlaces(), searchBox.getPlaces1(), searchBox.getPlaces2()

How do I extend this code to additional input fields?

<input id="pac-input" class="controls" type="text" placeholder="Search Box" /><br />
<input id="pac-input1" class="controls" type="text" placeholder="Search Box" />
<input id="pac-input2" class="controls" type="text" placeholder="Search box" />
<div id="map"></div>
<script>
    function initAutocomplete() {
        var map = new google.maps.Map(document.getElementById('map'), {
            center: { lat: 52.728616, lng: 6.4901 },
            zoom: 13,
            mapTypeId: 'roadmap'
        });

        // Create the search box and link it to the UI element.
        var input = document.getElementById('pac-input');
        var input1 = document.getElementById('pac-input1');
        var input2 = document.getElementById('pac-input2');
        var searchBox = new google.maps.places.SearchBox(input);
        var searchBox1 = new google.maps.places.SearchBox(input1);
        var searchBox2 = new google.maps.places.SearchBox(input2);
        map.controls[google.maps.ControlPosition.TOP_LEFT].push(input);
        map.controls[google.maps.ControlPosition.TOP_LEFT].push(input1);

        // Bias the SearchBox results towards current map's viewport.
        map.addListener('bounds_changed', function () {
            searchBox.setBounds(map.getBounds());
            searchBox1.setBounds(map.getBounds());
            searchBox2.setBounds(map.getBounds());
        });

        var markers = [];

        searchBox.addListener('places_changed', function () {
            var places = searchBox.getPlaces();

            if (places.length == 0) {
                return;
            }

            // Clear out the old markers.
            markers.forEach(function (marker) {
                marker.setMap(null);
            });
            markers = [];

            // For each place, get the icon, name and location.
            var bounds = new google.maps.LatLngBounds();
            places.forEach(function (place) {
                if (!place.geometry) {
                    console.log("Returned place contains no geometry");
                    return;
                }
                var 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(25, 25)
                };

                // Create a marker for each place.
                markers.push(new google.maps.Marker({
                    map: map,
                    icon: icon,
                    title: place.name,
                    position: place.geometry.location
                }));

                if (place.geometry.viewport) {
                    // Only geocodes have viewport.
                    bounds.union(place.geometry.viewport);
                } else {
                    bounds.extend(place.geometry.location);
                }
            });
            map.fitBounds(bounds);
        });
    }

</script>
<script src="https://maps.googleapis.com/maps/api/js?key=[APIKEY]&libraries=places&callback=initAutocomplete"
        async defer></script>

Answer 1

related question (for autocomplete): Google Maps API autocomplete 2nd address fields on same page

Get the array of <input> elements you want to use for the SearchBox , use those to create the SearchBox objects, create a function that takes the unique identifier for the SearchBox and a reference to the SearchBox object. Use that function to process the events from each of the SearchBox objects.

var searchBoxes = document.getElementsByClassName('controls');
for (var i=0; i<searchBoxes.length;i++) {
  var searchBox = new google.maps.places.SearchBox(searchBoxes[i]);
  map.controls[google.maps.ControlPosition.TOP_LEFT].push(searchBoxes[i]);
  map.addListener('bounds_changed', function() {
    searchBox.setBounds(map.getBounds());
  });
  markers.push([]);
  searchBox.addListener('places_changed', (function(i) {
    return function() {
      processSearch(i, this)
    }
  }(i)));
}

processSearch function:

function processSearch(uniqueId, searchBox) {
  var places = searchBox.getPlaces();

  if (places.length == 0) {
    return;
  }

  // Clear out the old markers.
  markers[uniqueId].forEach(function(marker) {
    marker.setMap(null);
  });
  markers[uniqueId] = [];

  // For each place, get the icon, name and location.
  var bounds = new google.maps.LatLngBounds();
  places.forEach(function(place) {
    if (!place.geometry) {
      console.log("Returned place contains no geometry");
      return;
    }
    var 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(25, 25)
    };

    // Create a marker for each place.
    if (!markers[uniqueId]) markers.push([]);
    markers[uniqueId].push(new google.maps.Marker({
      map: map,
      icon: icon,
      title: place.name,
      position: place.geometry.location
    }));

    if (place.geometry.viewport) {
      // Only geocodes have viewport.
      bounds.union(place.geometry.viewport);
    } else {
      bounds.extend(place.geometry.location);
    }
  });
  map.fitBounds(bounds);
}

proof of concept fiddle

code snippet:

 html, body, #map { height: 100%; width: 100%; margin: 0px; padding: 0px } .controls { width: 100px; } 

 <input id="pac-input" class="controls" type="text" placeholder="Search Box" /> <input id="pac-input1" class="controls" type="text" placeholder="Search Box" /> <input id="pac-input2" class="controls" type="text" placeholder="Search box" /> <input id="pac-input3" class="controls" type="text" placeholder="Search box" /> <input id="pac-input4" class="controls" type="text" placeholder="Search box" /> <input id="pac-input5" class="controls" type="text" placeholder="Search box" /> <div id="map"></div> <script> function initAutocomplete() { var map = new google.maps.Map(document.getElementById('map'), { center: { lat: 52.728616, lng: 6.4901 }, zoom: 13, mapTypeId: 'roadmap' }); var markers = []; // Create the search boxs and link them to the UI elements. var searchBoxes = document.getElementsByClassName('controls'); for (var i = 0; i < searchBoxes.length; i++) { var searchBox = new google.maps.places.SearchBox(searchBoxes[i]); map.controls[google.maps.ControlPosition.TOP_LEFT].push(searchBoxes[i]); map.addListener('bounds_changed', function() { searchBox.setBounds(map.getBounds()); }); markers.push([]); searchBox.addListener('places_changed', (function(i) { return function() { processSearch(i, this) } }(i))); } function processSearch(uniqueId, searchBox) { var places = searchBox.getPlaces(); if (places.length == 0) { return; } // Clear out the old markers. markers[uniqueId].forEach(function(marker) { marker.setMap(null); }); markers[uniqueId] = []; // For each place, get the icon, name and location. var bounds = new google.maps.LatLngBounds(); places.forEach(function(place) { if (!place.geometry) { console.log("Returned place contains no geometry"); return; } var 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(25, 25) }; // Create a marker for each place. if (!markers[uniqueId]) markers.push([]); markers[uniqueId].push(new google.maps.Marker({ map: map, icon: icon, title: place.name, position: place.geometry.location })); if (place.geometry.viewport) { // Only geocodes have viewport. bounds.union(place.geometry.viewport); } else { bounds.extend(place.geometry.location); } }); map.fitBounds(bounds); } } </script> <script src="https://maps.googleapis.com/maps/api/js?libraries=places&callback=initAutocomplete" async defer></script>