我在使用Google地图V3 API时遇到了一些麻烦。重新加载数据时无法删除Google地图标记
这里是我的AngularJS指令:
;
(function() {
"use strict";
angular.module('LoVendoApp.directives')
.directive('map', ['SimpleRETS', 'InfoWindowService', 'McOptions', 'ModalOptions', '$rootScope', '$parse', '$uibModal', '$timeout', 'SafetyFilter',
function (SimpleRETS, InfoWindowService, McOptions, ModalOptions, $rootScope, $parse, $uibModal, $timeout, SafetyFilter) {
return {
restrict: 'A',
scope: {
requestObj: '='
},
link: function (scope, el, attrs) {
//Creating map instance with GoogleMaps API
var map = new google.maps.Map(el[0], {
center: {
lat: 25.7742700,
lng: -80.1936600
},
zoom: 8
});
//Markers array
var markers = [];
console.log('on init = ', markers.length);
/**
* Creates new google maps
* marker
*
* @param {Object} param
*
*/
function _newGoogleMapsMarker(param) {
var r = new google.maps.Marker({
map: param._map,
position: new google.maps.LatLng(param._lat, param._lng),
title: param._head,
icon: param._icon
});
if (param._data) {
google.maps.event.addListener(r, 'click', function() {
// this -> the marker on which the onclick event is being attached
if (!this.getMap()._infoWindow) {
this.getMap()._infoWindow = new google.maps.InfoWindow();
}
this.getMap()._infoWindow.close();
var content = InfoWindowService.getContent(param._data);
this.getMap()._infoWindow.setContent(content);
//Creates event listener for InfoWindow insances
google.maps.event.addListener(this.getMap()._infoWindow, 'domready', function() {
$("#iw_container")
.off("click")
.on("click", modalListener);
//Opens modal when click is listened
function modalListener() {
var modalOptions = ModalOptions.getHouseDetailOptions(param._data);
var modalInstance = $uibModal.open(modalOptions);
}
});
this.getMap()._infoWindow.open(this.getMap(), this);
});
}
return r;
}
//Handling request with SimpleRETS service factory
scope.$on('loadMap', function() {
SimpleRETS.requestHandler(scope.requestObj).then(dataReceived, dataError);
function dataReceived(res) {
if (markers.length > 0) {
for (var k = 0; k > markers.length; k++) {
markers[k].setMap(null);
console.log('removing! #', k);
}
markers = [];
console.log('removed!');
}
var results = res.filter(SafetyFilter.filterData);
$rootScope.globalHousesData = results;
if (markers.length == 0)
$timeout(loadMarkers(results), 1000);
}
function dataError(error) {
console.log('mapError', error);
}
});
//Randomizes position for matching coordinates
function randomPos() {
return Math.random() * (0.0001 - 0.00005) + 0.00005;
}
function loadMarkers(results) {
// Fetching marker options from service
var options = McOptions.getOptions;
for (var i = 0; i < results.length; i++) {
var marker = _newGoogleMapsMarker({
_map: map,
_icon: 'assets/images/icon.png',
_lat: results[i].geo.lat,
_lng: results[i].geo.lng,
_head: '|' + new google.maps.LatLng(results[i].geo.lat, results[i].geo.lng),
_data: results[i]
});
markers.push(marker);
}
var markerCluster = new MarkerClusterer(map, markers, options);
}
//Initializes event to load m
scope.$broadcast('loadMap');
}
}
}
]);
})();
正如你可以看到我已经要疯了与console.logs,看看有什么问题我的逻辑。它看起来有点压倒性,但我只有4个主要组件或行动。第一予初始化地图:
var map = new google.maps.Map(el[0], {
center: {
lat: 25.7742700,
lng: -80.1936600
},
zoom: 8
});
的I实例化一个标记阵列:var markers = [];
然后,我有2层主要的功能。一个创建新的标记:_newGoogleMapMarkers(param)
该函数接受一个param对象,该对象基本上包含地图对象,位置坐标,图标,标题以及InfoWindow中可用的一些内容。另外,我正在为所有InfoWindows提供onClick监听器,以在我的应用中打开外部模式。
其他功能时,应标记数组为空被触发,它从我使用(SimpleRETS)
这一切都是由事件触发外部API加载新的数据`$每当过滤器发生变化时触发$ broadcast('loadMap'),用户与某些东西交互等。
问题是,即使我在调用loadMarkers()
函数时标记数组为空在迭代和做标记[k] .setMap(null))之后,旧标记留在地图中,创建一个每个负载加载500个标记时会出现大量标记。我甚至试图在下一次加载之前marker数组为空后设置1000ms的超时时间,以查看它是否以任何方式提供帮助,但事实并非如此。
那么你们怎么看?我会很感激你的任何建议。