我正在使用 leaflet.js 包进行流星工作，在初始渲染时无法让地图默认为我的当前位置。setView 方法可以很好地处理硬数字，但它不喜欢我的变量。我对 js 还很陌生，所以错误可能很明显。这是我的：

 Template.map.rendered = function() {
 L.Icon.Default.imagePath = 'packages/bevanhunt_leaflet/images';

 if (navigator.geolocation) {
  navigator.geolocation.getCurrentPosition(function(position) {
    console.log('--- Your Position: ---');
    console.log('Lat: ' + position.coords.latitude);
    latit = position.coords.latitude;
    console.log('Long: ' + position.coords.longitude);
    longit = position.coords.longitude;
    console.log('---------------------');
    var abc = L.marker([position.coords.latitude, position.coords.longitude]).addTo(map);
} 
)}

map = L.map('map', {
  doubleClickZoom: false
}).setView([latit, longit], 13);

我不断收到的错误是

Uncaught TypeError: Cannot read property 'addLayer' of undefined
L.Marker.L.Class.extend.addTo @ leaflet-src.js:3511
(anonymous function) @ client.js?ea76789cca0ff64d5985320ec2127d5de1fb802f:28

当我 console.log(latit) 或 console.log(longit) 时，它会返回数字，以及后面的“未定义”。在此先感谢任何能提供帮助的人！

编辑：

初始渲染时的精确控制台输出：

Exception from Tracker afterFlush function:
debug.js:41 ReferenceError: latit is not defined
    at Template.map.rendered (client.js?    ea76789cca0ff64d5985320ec2127d5de1fb802f:36)
    at template.js:116
    at Function.Template._withTemplateInstanceFunc (template.js:437)
    at fireCallbacks (template.js:112)
    at null.<anonymous> (template.js:205)
    at view.js:104
    at Object.Blaze._withCurrentView (view.js:523)
    at view.js:103
at Object.Tracker._runFlush (tracker.js:468)
at onGlobalMessage (setimmediate.js:102)
client.js?ea76789cca0ff64d5985320ec2127d5de1fb802f:22 --- Your Position: ---
client.js?ea76789cca0ff64d5985320ec2127d5de1fb802f:23 Lat: 41.0525926
client.js?ea76789cca0ff64d5985320ec2127d5de1fb802f:25 Long: -73.5398427
client.js?ea76789cca0ff64d5985320ec2127d5de1fb802f:27 ---------------------
leaflet-src.js:3511 Uncaught TypeError: Cannot read property 'addLayer' of     undefinedL.Marker.L.Class.extend.addTo @ leaflet-src.js:3511(anonymous function)     @ client.js?ea76789cca0ff64d5985320ec2127d5de1fb802f:28

编辑 2： 我想保持简单，但这是我的完整 js：

var map;
var latit;
var longit;

// on startup run resizing event
Meteor.startup(function() {
$(window).resize(function() {
$('#map').css('height', window.innerHeight - 82 - 45);
});
$(window).resize(); // trigger resize event 
});

// create marker collection
var Markers = new Meteor.Collection('markers');

Meteor.subscribe('markers');

 Template.map.rendered = function() {
 L.Icon.Default.imagePath = 'packages/bevanhunt_leaflet/images';

 if (navigator.geolocation) {
  navigator.geolocation.getCurrentPosition(function(position) {
    console.log('--- Your Position: ---');
    console.log('Lat: ' + position.coords.latitude);
    latit = position.coords.latitude;
    console.log('Long: ' + position.coords.longitude);
    longit = position.coords.longitude;
    console.log('---------------------');
    var abc = L.marker([position.coords.latitude, position.coords.longitude]).addTo(map);
} 
)}

map = L.map('map', {
  doubleClickZoom: false
}).setView([latit, longit], 13); //Error is somewhere before here!!

L.tileLayer.provider('Thunderforest.Outdoors').addTo(map);


map.on('dblclick', function(event) {
 Markers.insert({latlng: event.latlng});
});

//add markers
var query = Markers.find();
query.observe({
added: function (document) {
  var marker = L.marker(document.latlng).addTo(map)
    .on('click', function(event) {
      map.removeLayer(marker);
      Markers.remove({_id: document._id});
    });
},
//remove markers
removed: function (oldDocument) {
  layers = map._layers;
  var key, val;
  for (key in layers) {
    val = layers[key];
    if (val._latlng) {
      if (val._latlng.lat === oldDocument.latlng.lat && val._latlng.lng === oldDocument.latlng.lng) {
        map.removeLayer(val);
      }
    }
  }
}
});
};