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javascript - 如何在谷歌地图上显示方向后隐藏其他标记

问题描述

这个谷歌地图是为了获取到由客户坐标指定的位置作为目的地的路线。

为了从选择中的数据中获取它google.maps.LatLng，我将其设为对象，并将坐标保存为值中的字符串，然后解析出纬度和经度以创建LatLng对象。

步骤是：

1-保存选项值中的坐标：

for (var i = 0; i < data.length; i++) {
  displayLocation(data[i]);
  addOption(selectBox, data[i]['CodeClient'], data[i].Latitude + "," + data[i].Longitude);
}

2-解析这些坐标并google.maps.LatLng在方向请求中创建一个对象：

function calculateRoute() {

  var start = document.getElementById('start').value;
  var destination = document.getElementById('destination').value;
  console.log("selected option value=" + destination);
  var destPt = destination.split(",");
  var destination = new google.maps.LatLng(destPt[0], destPt[1]);
  if (start == '') {
    start = center;
  }
  // ....

（以上所有工作正常）

-----这是我卡住的地方：-----

即使显示到指定标记的方向，问题是所有标记仍在地图中，对我来说，我尝试让我的函数只显示方向和标记与我选择的代码客户端的两件事，以及所有其他标记将隐藏。

这是我在代码中添加的注释，

**1--***一旦我添加了这个函数来将所有标记推送到一个变量中*

    makeRequest('https://gist.githubusercontent.com/abdelhakimsalama/3cce25789f00c1b84ccb5b231ec455b7/raw/393220f08a02b962e3e764d2b497b318353828db/gistfile1.txt', function(data) {

    for (var i = 0; i < data.length; i++) {

      var marker = new google.maps.Marker({
        position: new google.maps.LatLng(data[i].Latitude, data[i].Longitude),
        title: data[i].CodeClient,
        map: map
        });

        gmarkers.push(marker);
    }

  });

**2--***我添加了这个函数来隐藏其他标记*

 function toggleMarkers() {
  for (i = 0; i < gmarkers.length; i++) {
    if (gmarkers[i].getMap() != null) gmarkers[i].setMap(null);
    else gmarkers[i].setMap(map);
  }
}

这个问题我已经面临了好几天并且似乎无法解决，即使我已经尝试在这里和 Google Maps API 文档中查看各种各样的代码块，但仍然无法弄清楚如何隐藏其他标记。

任何建议、想法和帮助将不胜感激！

这是一个截图：

在此处输入图像描述

-------------------------------------------------- -------------------------------------------------- ------------------------------

这是我更新后的代码

在您的建议之后，这是我的代码的更新。

它工作得很好，在我点击按钮（清除标记）后，所有标记都会删除。

现在我想知道如何制作函数toggleMarkers()，删除所有标记，但它会将标记保留在我选择的代码客户端中，

var gmarkers = [];

var map;
var directionsService;
var directionsDisplay;
var geocoder;
var infowindow;

						/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
function init() {
  directionsService = new google.maps.DirectionsService();
  directionsDisplay = new google.maps.DirectionsRenderer();
  geocoder = new google.maps.Geocoder();
  infowindow = new google.maps.InfoWindow();
  
						/*++++++++++++++++++*/
						
  var mapOptions = {
    zoom: 6,
    center: center = new google.maps.LatLng(32, -6),
    mapTypeId: google.maps.MapTypeId.ROADMAP
  }

  						/*++++++++++++++++++*/

  map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);

  directionsDisplay.setMap(map);
  directionsDisplay.setPanel(document.getElementById('directions_panel'));

  // Detect user location
  if (navigator.geolocation) {
	  
    navigator.geolocation.getCurrentPosition(function(position) {
      var userLocation = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
      geocoder.geocode({
        'latLng': userLocation
      }, function(results, status) {
        if (status == google.maps.GeocoderStatus.OK) {
          document.getElementById('start').value = results[0].formatted_address
        }
      });

    }, function() {
      alert('Geolocation is supported, but it failed');
    });
  }
  
						/*++++++++++++++++++*/

  makeRequest('https://gist.githubusercontent.com/abdelhakimsalama/3cce25789f00c1b84ccb5b231ec455b7/raw/393220f08a02b962e3e764d2b497b318353828db/gistfile1.txt', function(data) {

    var data = JSON.parse(data.responseText);
    var selectBox = document.getElementById('destination');

    for (var i = 0; i < data.length; i++) {
      displayLocation(data[i]);
      addOption(selectBox, data[i]['CodeClient'], data[i].Latitude + "," + data[i].Longitude);
    }

  }); 
  

}

						/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
function toggleMarkers() {
  for (i = 0; i < gmarkers.length; i++) {
    if (gmarkers[i].getMap() != null) gmarkers[i].setMap(null);
    else gmarkers[i].setMap(map);
  }
}	
						/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/

function addOption(selectBox, text, value) {
  var option = document.createElement("OPTION");
  option.text = text;
  option.value = value;
  selectBox.options.add(option);
}

						/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/

function calculateRoute() {
  var start = document.getElementById('start').value;
  var destination = document.getElementById('destination').value;
  var hakim = document.getElementById('destination');
  console.log("selected option value=" + destination);
  console.log(" value=" + hakim);
  var destPt = destination.split(",");
  var destination = new google.maps.LatLng(destPt[0], destPt[1]);
  if (start == '') {
    start = center;
  }

  var request = {
    origin: start,
    destination: destination,
    travelMode: google.maps.DirectionsTravelMode.DRIVING
  };
  console.log("origin:" + start);
  console.log("dest:" + destination.toUrlValue(12));
  directionsService.route(request, function(response, status) {
    if (status == google.maps.DirectionsStatus.OK) {
      directionsDisplay.setDirections(response);
    }
  });
  alert("???");
  displayLocation(hakim);
}

						/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/

function makeRequest(url, callback) {
  var request;
  if (window.XMLHttpRequest) {
    request = new XMLHttpRequest(); // IE7+, Firefox, Chrome, Opera, Safari
  } else {
    request = new ActiveXObject("Microsoft.XMLHTTP"); // IE6, IE5
  }
  request.onreadystatechange = function() {
    if (request.readyState == 4 && request.status == 200) {
      callback(request);
    }
  }
  request.open("GET", url, true);
  request.send();
}

						/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/


function displayLocation(rythmstu_innotec) {
  var content = '<div class="infoWindow"><strong> Code Client : ' + rythmstu_innotec.CodeClient + '</strong>' +
    '<br />Latitude : ' + rythmstu_innotec.Latitude +
    '<br />Longitude : ' + rythmstu_innotec.Longitude +
    '<br />Route : ' + rythmstu_innotec.Route +
    '<br />Secteur : ' + rythmstu_innotec.Secteur +
    '<br />Agence : ' + rythmstu_innotec.Agence +
    '<br />prenom de Client : ' + rythmstu_innotec.PrenomClient +
    '<br />Num Adresse : ' + rythmstu_innotec.NumAdresse +
    '<br />GeoAdresse : ' + rythmstu_innotec.GeoAdresse +
    '<br />Téléphone : ' + rythmstu_innotec.Tel +
    '<br />Whatsapp : ' + rythmstu_innotec.Whatsapp +
    '<br />Nbr Frigos : ' + rythmstu_innotec.NbrFrigo +
    '<br />Ouverture Matin : ' + rythmstu_innotec.OpenAm +
    '<br />Fermeture Matin : ' + rythmstu_innotec.CloseAm +
    '<br />Ouverture après-midi : ' + rythmstu_innotec.OpenPm +
    '<br />Fermeture Après-midi : ' + rythmstu_innotec.ClosePm + '</div>';

  if (parseInt(rythmstu_innotec.Latitude) == 0) {
    geocoder.geocode({
      'GeoAdresse': rythmstu_innotec.GeoAdresse
    }, function(results, status) {
      if (status == google.maps.GeocoderStatus.OK) {
        var marker = new google.maps.Marker({
          map: map,
          position: results[0].geometry.rythmstu_innotec,
          title: rythmstu_innotec.name
        });

        google.maps.event.addListener(marker, 'click', function() {
          infowindow.setContent(content);
          infowindow.open(map, marker);
        });
      }
    });
  } else {
    var position = new google.maps.LatLng(parseFloat(rythmstu_innotec.Latitude), parseFloat(rythmstu_innotec.Longitude));
    var marker = new google.maps.Marker({
      map: map,
      position: position,
      title: rythmstu_innotec.name
    });
	gmarkers.push(marker);

    google.maps.event.addListener(marker, 'click', function() {
      infowindow.setContent(content);
      infowindow.open(map, marker);
    });
  }
}
body {
  font: normal 14px Verdana;
}

h1 {
  font-size: 24px;
}

h2 {
  font-size: 18px;
}

#sidebar {
  float: right;
  width: 30%;
}

#main {
  padding-right: 15px;
}

.infoWindow {
  width: 220px;
}
<title>MAP itinéraire </title>
<meta charset="utf-8">
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js"></script>

<body onload="init();">



  <form id="services">
    Location: <input type="text" id="start" value="Midar" /> Destination:
    <select id="destination" onchange="calculateRoute();"></select>
    <input type="button" value="clear map" onclick="toggleMarkers();" />
  </form>

  <section id="sidebar">
    <div id="directions_panel"></div>
  </section>

  <section id="main">
    <div id="map_canvas" style="width: 70%; height: 750px;"></div>
  </section>

</body>

标签： javascriptphpgoogle-mapsgoogle-maps-api-3xmlhttprequest

解决方案

您永远不会调用该toggleMarkers函数。

  1. 修改为hideMarkers：
function hideMarkers() {
  for (i = 0; i < gmarkers.length; i++) {
    gmarkers[i].setMap(null);
  }
}
  1. 然后在成功的方向服务回调函数中调用它：
function calculateRoute() {
  var start = document.getElementById('start').value;
  var destination = document.getElementById('destination').value;
  var hakim = document.getElementById('destination');
  var destPt = destination.split(",");
  var destination = new google.maps.LatLng(destPt[0], destPt[1]);
  if (start == '') {
    start = center;
  }

  var request = {
    origin: start,
    destination: destination,
    travelMode: google.maps.DirectionsTravelMode.DRIVING
  };
  directionsService.route(request, function(response, status) {
    if (status == google.maps.DirectionsStatus.OK) {
      directionsDisplay.setDirections(response);
      hideMarkers();  // <========================= call it here
    }
  });
  displayLocation(hakim);
}

代码片段：

var gmarkers = [];

var map;
var directionsService;
var directionsDisplay;
var geocoder;
var infowindow;

/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
function init() {
  directionsService = new google.maps.DirectionsService();
  directionsDisplay = new google.maps.DirectionsRenderer();
  geocoder = new google.maps.Geocoder();
  infowindow = new google.maps.InfoWindow();

  /*++++++++++++++++++*/

  var mapOptions = {
    zoom: 6,
    center: center = new google.maps.LatLng(32, -6),
    mapTypeId: google.maps.MapTypeId.ROADMAP
  }

  /*++++++++++++++++++*/

  map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);

  directionsDisplay.setMap(map);
  directionsDisplay.setPanel(document.getElementById('directions_panel'));

  // Detect user location
  if (navigator.geolocation) {

    navigator.geolocation.getCurrentPosition(function(position) {
      var userLocation = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
      geocoder.geocode({
        'latLng': userLocation
      }, function(results, status) {
        if (status == google.maps.GeocoderStatus.OK) {
          document.getElementById('start').value = results[0].formatted_address
        }
      });

    }, function() {
      alert('Geolocation is supported, but it failed');
    });
  }

  /*++++++++++++++++++*/

  makeRequest('https://gist.githubusercontent.com/abdelhakimsalama/3cce25789f00c1b84ccb5b231ec455b7/raw/393220f08a02b962e3e764d2b497b318353828db/gistfile1.txt', function(data) {

    var data = JSON.parse(data.responseText);
    var selectBox = document.getElementById('destination');

    for (var i = 0; i < data.length; i++) {
      displayLocation(data[i]);
      addOption(selectBox, data[i]['CodeClient'], data[i].Latitude + "," + data[i].Longitude);
    }
  });
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
function hideMarkers() {
  console.log("gmarkers.length=" + gmarkers.length);
  for (i = 0; i < gmarkers.length; i++) {
    gmarkers[i].setMap(null);
  }
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/

function addOption(selectBox, text, value) {
  var option = document.createElement("OPTION");
  option.text = text;
  option.value = value;
  selectBox.options.add(option);
}
/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/

function calculateRoute() {
  var start = document.getElementById('start').value;
  var destination = document.getElementById('destination').value;
  var hakim = document.getElementById('destination');
  console.log("selected option value=" + destination);
  console.log(" value=" + hakim);
  var destPt = destination.split(",");
  var destination = new google.maps.LatLng(destPt[0], destPt[1]);
  if (start == '') {
    start = center;
  }

  var request = {
    origin: start,
    destination: destination,
    travelMode: google.maps.DirectionsTravelMode.DRIVING
  };
  console.log("origin:" + start);
  console.log("dest:" + destination.toUrlValue(12));
  directionsService.route(request, function(response, status) {
    if (status == google.maps.DirectionsStatus.OK) {
      directionsDisplay.setDirections(response);
      hideMarkers();
    }
  });
  displayLocation(hakim);
}

/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/

function makeRequest(url, callback) {
  var request;
  if (window.XMLHttpRequest) {
    request = new XMLHttpRequest(); // IE7+, Firefox, Chrome, Opera, Safari
  } else {
    request = new ActiveXObject("Microsoft.XMLHTTP"); // IE6, IE5
  }
  request.onreadystatechange = function() {
    if (request.readyState == 4 && request.status == 200) {
      callback(request);
    }
  }
  request.open("GET", url, true);
  request.send();
}

/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/


function displayLocation(rythmstu_innotec) {
  var content = '<div class="infoWindow"><strong> Code Client : ' + rythmstu_innotec.CodeClient + '</strong>' +
    '<br />Latitude : ' + rythmstu_innotec.Latitude +
    '<br />Longitude : ' + rythmstu_innotec.Longitude +
    '<br />Route : ' + rythmstu_innotec.Route +
    '<br />Secteur : ' + rythmstu_innotec.Secteur +
    '<br />Agence : ' + rythmstu_innotec.Agence +
    '<br />prenom de Client : ' + rythmstu_innotec.PrenomClient +
    '<br />Num Adresse : ' + rythmstu_innotec.NumAdresse +
    '<br />GeoAdresse : ' + rythmstu_innotec.GeoAdresse +
    '<br />Téléphone : ' + rythmstu_innotec.Tel +
    '<br />Whatsapp : ' + rythmstu_innotec.Whatsapp +
    '<br />Nbr Frigos : ' + rythmstu_innotec.NbrFrigo +
    '<br />Ouverture Matin : ' + rythmstu_innotec.OpenAm +
    '<br />Fermeture Matin : ' + rythmstu_innotec.CloseAm +
    '<br />Ouverture après-midi : ' + rythmstu_innotec.OpenPm +
    '<br />Fermeture Après-midi : ' + rythmstu_innotec.ClosePm + '</div>';

  if (parseInt(rythmstu_innotec.Latitude) == 0) {
    geocoder.geocode({
      'GeoAdresse': rythmstu_innotec.GeoAdresse
    }, function(results, status) {
      if (status == google.maps.GeocoderStatus.OK) {
        var marker = new google.maps.Marker({
          map: map,
          position: results[0].geometry.rythmstu_innotec,
          title: rythmstu_innotec.name
        });

        google.maps.event.addListener(marker, 'click', function() {
          infowindow.setContent(content);
          infowindow.open(map, marker);
        });
      }
    });
  } else {
    var position = new google.maps.LatLng(parseFloat(rythmstu_innotec.Latitude), parseFloat(rythmstu_innotec.Longitude));
    var marker = new google.maps.Marker({
      map: map,
      position: position,
      title: rythmstu_innotec.name
    });
    gmarkers.push(marker);

    google.maps.event.addListener(marker, 'click', function() {
      infowindow.setContent(content);
      infowindow.open(map, marker);
    });
  }
}
body {
  font: normal 14px Verdana;
}

h1 {
  font-size: 24px;
}

h2 {
  font-size: 18px;
}

#sidebar {
  float: right;
  width: 30%;
}

#main {
  padding-right: 15px;
}

.infoWindow {
  width: 220px;
}
<title>MAP itinéraire </title>
<meta charset="utf-8">
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js"></script>

<body onload="init();">

  <form id="services">
    Location: <input type="text" id="start" value="Midar" /> Destination:
    <select id="destination" onchange="calculateRoute();"></select>
    <input type="button" value="clear map" onclick="toggleMarkers();" />
  </form>

  <section id="sidebar">
    <div id="directions_panel"></div>
  </section>

  <section id="main">
    <div id="map_canvas" style="width: 70%; height: 750px;"></div>
  </section>

</body>

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