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我正在建立一個小部件,用戶可以上傳一個Excel文件,並在谷歌地圖中標記的地方。谷歌地圖標記與angularjs大數據
下面的代碼有效,但是當我讀取一個具有10k數據量的大型excel文件時,問題就出現了,瀏覽器卡住了。我正在使用for循環並添加一些超時從Google API獲取數據。
我通過城市名稱並獲取經度和緯度並在地圖上標記它。 有沒有更好的方法可以實施?
下面是代碼:
function googleMapsInit(widId, $scope, $http, $rootScope, $mdDialog) {
$scope.finish = function() {
var objIndex = getRootObjectById(widId, $rootScope.dashboard.widgets);
$mdDialog.hide();
document.getElementById('map').innerHTML = "";
//excel data
var array = JSON.parse($rootScope.json_string);
$scope.locationData = [];
//dividing it to chunks
var k,j,temparray,chunk = 8;
for (k=0,j=array.length; k<j; k+=chunk) {
temparray = array.slice(k,k+chunk);
var i;
//getting the longitude and latitude from the google geo api
for(i=0;i < temparray.length ; i++){
Geocode(temparray[i].PLACE_OF_ACCIDENT);
}
}
//sometimes data gets delayed
setTimeout(function(){ googleMap(); }, 5000);
};
function Geocode(address) {
var obj = {};
var geocoder = new google.maps.Geocoder();
geocoder.geocode({'address': address}, function(results, status) {
if (status === google.maps.GeocoderStatus.OK) {
obj = {
lat : results[0].geometry.location.G,
lng : results[0].geometry.location.K
};
setTimeout(function(){ $scope.locationData.push(obj); }, 100);
}
else if (status === google.maps.GeocoderStatus.OVER_QUERY_LIMIT) {
setTimeout(function() {
Geocode(address);
}, 100);
}
else if (status === google.maps.GeocoderStatus.ZERO_LIMIT) {
setTimeout(function() {
Geocode(address);
}, 100);
}
else {
}
});
}
function googleMap() {
var dataStore = $scope.locationData;
var array = JSON.parse($rootScope.json_string);
var map = new google.maps.Map(document.getElementById('map'),{
center: {lat: 7.85, lng: 80.65},
zoom: 6 });
var pinImageGreen = new google.maps.MarkerImage("http://maps.google.com/mapfiles/ms/icons/green-dot.png");
var pinImageBlue = new google.maps.MarkerImage("http://maps.google.com/mapfiles/ms/icons/blue-dot.png");
var marker = [];
var k;
for(k=0; k < array.length; k++){
marker[k] = new google.maps.Marker({
position: {lat: $scope.locationData[k].lat, lng: $scope.locationData[k].lng},
map: map,
title: array[k].PLACE_OF_ACCIDENT,
icon: pinImageGreen,
VEHICLE_TYPE: array[k].VEHICLE_TYPE,
VEHICLE_USAGE: array[k].VEHICLE_USAGE,
VEHICLE_CLASS: array[k].VEHICLE_CLASS
});
marker[k].addListener('click', function(data) {
var j;
for(j=0;j<array.length;j++){
if(($scope.locationData[j].lat == data.latLng.G) && ($scope.locationData[j].lng == data.latLng.K)){
document.getElementById("details").innerHTML =
array[j].PLACE_OF_ACCIDENT + "</br>" +
array[j].VEHICLE_TYPE + "</br>" +
array[j].VEHICLE_USAGE + "</br>" +
array[j].VEHICLE_CLASS + "</br>" ;
}
}
});
}
}
$scope.cancel = function() {
$mdDialog.hide();
};
}
嘿,如果我的回答對你有所幫助,你會介意將它標記爲已接受的答案嗎? –