Jquery 谷歌地图v3自动刷新标记只

我正在使用Google Maps V3显示一些PIN。我希望能够在不影响地图位置或缩放级别的情况下刷新标记。我希望每x秒更新一次标记

我该怎么做呢？我在jQuery/ajax方面没有那么多经验

下面是我的地图的一个工作示例

var位置=[
[‘这里有一些随机信息’，-37.8139144.9634,1]，
[“这里有一些随机信息”，46.0553,14.5144,2]，
[‘这里有一些随机信息’，-33.7333151.0833,3]，
[这里有一些随机信息，27.9798，-81.731,4]，]；
var map=new google.maps.map（document.getElementById（'map_2385853'）{
缩放：1，
最大缩放：8，
minZoom:1，
街景控制：错误，
中心：新google.maps.LatLng（40,0），
mapTypeId:google.maps.mapTypeId.ROADMAP
});
var infowindow=new google.maps.infowindow（）；
var标记，i；
对于（i=0；i

---

谢谢你

好的，我有一些东西在工作——主要是对原始代码进行了大量重构——你会识别出各种块

$(function() {
    var locations = {};//A repository for markers (and the data from which they were constructed).

    //initial dataset for markers
    var locs = {
        1: { info:'11111. Some random info here', lat:-37.8139, lng:144.9634 },
        2: { info:'22222. Some random info here', lat:46.0553, lng:14.5144 },
        3: { info:'33333. Some random info here', lat:-33.7333, lng:151.0833 },
        4: { info:'44444. Some random info here', lat:27.9798, lng:-81.731 }
    };
    var map = new google.maps.Map(document.getElementById('map_2385853'), {
        zoom: 1,
        maxZoom: 8,
        minZoom: 1,
        streetViewControl: false,
        center: new google.maps.LatLng(40, 0),
        mapTypeId: google.maps.MapTypeId.ROADMAP
    });
    var infowindow = new google.maps.InfoWindow();

var auto_remove = true;//When true, markers for all unreported locs will be removed.

function setMarkers(locObj) {
    if(auto_remove) {
        //Remove markers for all unreported locs, and the corrsponding locations entry.
        $.each(locations, function(key) {
            if(!locObj[key]) {
                if(locations[key].marker) {
                    locations[key].marker.setMap(null);
                }
                delete locations[key];
            }
        });
    }

        $.each(locObj, function(key, loc) {
            if(!locations[key] && loc.lat!==undefined && loc.lng!==undefined) {
                //Marker has not yet been made (and there's enough data to create one).

                //Create marker
                loc.marker = new google.maps.Marker({
                    position: new google.maps.LatLng(loc.lat, loc.lng),
                    map: map
                });

                //Attach click listener to marker
                google.maps.event.addListener(loc.marker, 'click', (function(key) {
                    return function() {
                        infowindow.setContent(locations[key].info);
                        infowindow.open(map, locations[key].marker);
                    }
                })(key));

                //Remember loc in the `locations` so its info can be displayed and so its marker can be deleted.
                locations[key] = loc;
            }
            else if(locations[key] && loc.remove) {
                //Remove marker from map
                if(locations[key].marker) {
                    locations[key].marker.setMap(null);
                }
                //Remove element from `locations`
                delete locations[key];
            }
            else if(locations[key]) {
                //Update the previous data object with the latest data.
                $.extend(locations[key], loc);
                if(loc.lat!==undefined && loc.lng!==undefined) {
                    //Update marker position (maybe not necessary but doesn't hurt).
                    locations[key].marker.setPosition(
                        new google.maps.LatLng(loc.lat, loc.lng)
                    );
                }
                //locations[key].info looks after itself.
            }
        });
    }

    var ajaxObj = {//Object to save cluttering the namespace.
        options: {
            url: "........",//The resource that delivers loc data.
            dataType: "json"//The type of data tp be returned by the server.
        },
        delay: 10000,//(milliseconds) the interval between successive gets.
        errorCount: 0,//running total of ajax errors.
        errorThreshold: 5,//the number of ajax errors beyond which the get cycle should cease.
        ticker: null,//setTimeout reference - allows the get cycle to be cancelled with clearTimeout(ajaxObj.ticker);
        get: function() { //a function which initiates 
            if(ajaxObj.errorCount < ajaxObj.errorThreshold) {
                ajaxObj.ticker = setTimeout(getMarkerData, ajaxObj.delay);
            }
        },
        fail: function(jqXHR, textStatus, errorThrown) {
            console.log(errorThrown);
            ajaxObj.errorCount++;
        }
    };

    //Ajax master routine
    function getMarkerData() {
        $.ajax(ajaxObj.options)
          .done(setMarkers) //fires when ajax returns successfully
          .fail(ajaxObj.fail) //fires when an ajax error occurs
          .always(ajaxObj.get); //fires after ajax success or ajax error
    }

    setMarkers(locs);//Create markers from the initial dataset served with the document.
    //ajaxObj.get();//Start the get cycle.

    // *******************
    //test: simulated ajax
    /*
    var testLocs = {
        1: { info:'1. New Random info and new position', lat:-37, lng:124.9634 },//update info and position and 
        2: { lat:70, lng:14.5144 },//update position
        3: { info:'3. New Random info' },//update info
        4: { remove: true },//remove marker
        5: { info:'55555. Added', lat:-37, lng:0 }//add new marker
    };
    setTimeout(function() {
        setMarkers(testLocs);
    }, ajaxObj.delay);
    */
    // *******************
});

---

我不确定PHP是否能处理数字键。如果没有，请尝试字符串、

'1'

、

'2'

等。为所有键提供字母前缀可能是最安全的，例如

'loc1'

、

'loc2'

等。无论您选择做什么，请确保javascript

locs

对象中的键具有相同的类型和组成。

您想刷新标记吗（删除它们，然后添加新的）或者只是更新他们的位置？据我所知，你所要做的就是用新数据覆盖locations数组来更改现有的

位置
你需要安排每个位置都有一个唯一的id，通过这个id可以寻址。id需要由服务器生成。如果你不能这样做，那么你就没有了o在每次迭代时替换所有
位置（但不一定是所有相应的标记）。只要（a）您的1-4是ID，而不仅仅是索引，并且（b）服务器可以始终寻址每个位置（因此关联的标记）每次都通过相同的唯一id，那么你就有了进行选择性更新的基础，而不是完全替换。选择性更新需要更多的编程工作，因此如果位置数量较少，选择完全替换可能更现实。Daniel，是的，假设只有少数标记会被替换在每次迭代中都会受到影响，那么对于2000个标记，您肯定应该执行选择性更新。您所说的id生成很好。现有标记始终可以用相同的id重新寻址，新标记将收到一个新的以前未分配的id-完美。我现在没有时间帮助编写代码，但稍后会查看一天（几个小时后）。我想，如果我想更新特定的标记取决于json对象id，并保留其他标记的位置。不知何故，我从来没有让php部分工作。我看到php从服务器上拉出来，但它没有更新标记（只是删除所有标记）。我还将php输出作为test.json，再次，我看到它作为mime类型的json从Web服务器中提取，但在映射中没有发生任何事情。它不会在控制台中显示任何错误。
$(function() {
    var locations = {};//A repository for markers (and the data from which they were constructed).

    //initial dataset for markers
    var locs = {
        1: { info:'11111. Some random info here', lat:-37.8139, lng:144.9634 },
        2: { info:'22222. Some random info here', lat:46.0553, lng:14.5144 },
        3: { info:'33333. Some random info here', lat:-33.7333, lng:151.0833 },
        4: { info:'44444. Some random info here', lat:27.9798, lng:-81.731 }
    };
    var map = new google.maps.Map(document.getElementById('map_2385853'), {
        zoom: 1,
        maxZoom: 8,
        minZoom: 1,
        streetViewControl: false,
        center: new google.maps.LatLng(40, 0),
        mapTypeId: google.maps.MapTypeId.ROADMAP
    });
    var infowindow = new google.maps.InfoWindow();

var auto_remove = true;//When true, markers for all unreported locs will be removed.

function setMarkers(locObj) {
    if(auto_remove) {
        //Remove markers for all unreported locs, and the corrsponding locations entry.
        $.each(locations, function(key) {
            if(!locObj[key]) {
                if(locations[key].marker) {
                    locations[key].marker.setMap(null);
                }
                delete locations[key];
            }
        });
    }

        $.each(locObj, function(key, loc) {
            if(!locations[key] && loc.lat!==undefined && loc.lng!==undefined) {
                //Marker has not yet been made (and there's enough data to create one).

                //Create marker
                loc.marker = new google.maps.Marker({
                    position: new google.maps.LatLng(loc.lat, loc.lng),
                    map: map
                });

                //Attach click listener to marker
                google.maps.event.addListener(loc.marker, 'click', (function(key) {
                    return function() {
                        infowindow.setContent(locations[key].info);
                        infowindow.open(map, locations[key].marker);
                    }
                })(key));

                //Remember loc in the `locations` so its info can be displayed and so its marker can be deleted.
                locations[key] = loc;
            }
            else if(locations[key] && loc.remove) {
                //Remove marker from map
                if(locations[key].marker) {
                    locations[key].marker.setMap(null);
                }
                //Remove element from `locations`
                delete locations[key];
            }
            else if(locations[key]) {
                //Update the previous data object with the latest data.
                $.extend(locations[key], loc);
                if(loc.lat!==undefined && loc.lng!==undefined) {
                    //Update marker position (maybe not necessary but doesn't hurt).
                    locations[key].marker.setPosition(
                        new google.maps.LatLng(loc.lat, loc.lng)
                    );
                }
                //locations[key].info looks after itself.
            }
        });
    }

    var ajaxObj = {//Object to save cluttering the namespace.
        options: {
            url: "........",//The resource that delivers loc data.
            dataType: "json"//The type of data tp be returned by the server.
        },
        delay: 10000,//(milliseconds) the interval between successive gets.
        errorCount: 0,//running total of ajax errors.
        errorThreshold: 5,//the number of ajax errors beyond which the get cycle should cease.
        ticker: null,//setTimeout reference - allows the get cycle to be cancelled with clearTimeout(ajaxObj.ticker);
        get: function() { //a function which initiates 
            if(ajaxObj.errorCount < ajaxObj.errorThreshold) {
                ajaxObj.ticker = setTimeout(getMarkerData, ajaxObj.delay);
            }
        },
        fail: function(jqXHR, textStatus, errorThrown) {
            console.log(errorThrown);
            ajaxObj.errorCount++;
        }
    };

    //Ajax master routine
    function getMarkerData() {
        $.ajax(ajaxObj.options)
          .done(setMarkers) //fires when ajax returns successfully
          .fail(ajaxObj.fail) //fires when an ajax error occurs
          .always(ajaxObj.get); //fires after ajax success or ajax error
    }

    setMarkers(locs);//Create markers from the initial dataset served with the document.
    //ajaxObj.get();//Start the get cycle.

    // *******************
    //test: simulated ajax
    /*
    var testLocs = {
        1: { info:'1. New Random info and new position', lat:-37, lng:124.9634 },//update info and position and 
        2: { lat:70, lng:14.5144 },//update position
        3: { info:'3. New Random info' },//update info
        4: { remove: true },//remove marker
        5: { info:'55555. Added', lat:-37, lng:0 }//add new marker
    };
    setTimeout(function() {
        setMarkers(testLocs);
    }, ajaxObj.delay);
    */
    // *******************
});

<%php
$testLocs = array(
    'loc1' => array( 'info' => '1. New Random info and new position', 'lat' => 0, 'lng' => 144.9634 ),
    'loc2' => array( 'lat'  => 0, 'lng' => 14.5144 ),
    'loc3' => array( 'info' => '3. New Random info' ),
    'loc5' => array( 'info' => '55555. Added', 'lat' => 0, 'lng' => 60 )
);
echo json_encode($testLocs);
exit();
%>