我在使用Google地圖V3 API時遇到了一些麻煩。重新加載數據時無法刪除Google地圖標記
這裏是我的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經要瘋了與console.logs,看看有什麼問題我的邏輯。它看起來有點壓倒性,但我只有4個主要組件或行動。第一予初始化地圖:
var map = new google.maps.Map(el[0], {
center: {
lat: 25.7742700,
lng: -80.1936600
},
zoom: 8
});
的I實例化一個標記陣列:var markers = [];
然後,我有2層主要的功能。一個創建新的標記:_newGoogleMapMarkers(param)
該函數接受一個param對象,該對象基本上包含地圖對象,位置座標,圖標,標題以及InfoWindow中可用的一些內容。另外,我正在爲所有InfoWindows提供onClick監聽器,以在我的應用中打開外部模式。
其他功能時,應標記數組爲空被觸發,它從我使用(SimpleRETS)
這一切都是由事件觸發外部API加載新的數據`$每當過濾器發生變化時觸發$ broadcast('loadMap'),用戶與某些東西交互等。
問題是,即使我在調用loadMarkers()
函數時標記數組爲空在迭代和做標記[k] .setMap(null))之後,舊標記留在地圖中,創建一個每個負載加載500個標記時會出現大量標記。我甚至試圖在下一次加載之前marker數組爲空後設置1000ms的超時時間,以查看它是否以任何方式提供幫助,但事實並非如此。
那麼你們怎麼看?我會很感激你的任何建議。