我一直在构建一个Cordova应用程序作为概念证明,以展示我的一个想法,到目前为止它一直很好,我已经从这次经历中学到了很多东西。
我的工作基于this project on GitHub,但我仍然缺乏使用ReactJS的经验。我还与ESRI的在线地图一起进一步探索Leaflet-land。
我目前已经绘制出一条路线并作为FeatureLayer发布,甚至设法成功导入并在应用程序中显示它,但当然所有样式的实际形状都消失了。 (例如,颜色。)这是一个非常关键的部分。我找到了一个名为Esri-Leaflet-Renderers的Esri-Leaflet插件,但我在进口/运行时遇到了巨大的困难。
当我将Esri-Leaflet-Renderers的路径添加到Require的路径配置并将其包含在页面上时,整个事情都会锁定,并且我收到以下错误消息,我不知道如何调试:< / p>
Uncaught TypeError: Cannot read property 'FeatureLayer' of undefined(…)
以下是我设置require.config的方法:
如果您查看/www/js/main.js,除了esri-leaflet和esri-leaflet-renderers 之外,它们应该是相同的
require.config({
paths: {
...
leaflet: '../lib/leaflet/leaflet-src',
'esri-leaflet': '../lib/leaflet/esri-leaflet',
'esri-leaflet-renderers': '../lib/leaflet/esri-leaflet-renderers'
},
shim: {
...
'leaflet': {
exports: 'L'
}
}
});
我正在使用最新版本的传单(1.0.1)和esri-leaflet(2.0.4)。
Maps.js文件,其中包含地图及其所有恶作剧:
define(function (require) {
// Required libs
var Backbone = require("backbone");
var Utils = require("utils");
// Leaflet + ESRI = ❤
var L = {};
L = require("leaflet");
L.esri = require("esri-leaflet");
var renderers = require("esri-leaflet-renderers");
// Extend page function to add new page
var Maps = Utils.Page.extend({
constructorName: "Maps",
initialize: function () {
this.listenTo(this, "inTheDOM", function () {
var map, ll = new L.LatLng(65.838639, 13.188832), marker, popup, track;
map = L.map('map', {center: ll, zoom: 14});
L.esri.basemapLayer("Topographic").addTo(map);
track = L.esri.featureLayer({
url: 'http://services.arcgis.com/KDnc9fQhk48mvI9Z/arcgis/rest/services/Snøscooter_Løyper_i_Vefsn_Kommune/FeatureServer/0'
}).addTo(map);
});
},
id: "map",
render: function () {
return this;
}
});
return Maps;
});
我似乎无法弄清楚我做错了什么或出了什么问题。我是否正确导入了所有内容?
自午餐以来,我一直在反对这一点,但我已经意识到我需要一些帮助。我不能试探太多,但我会牺牲我的长子来解决问题!
答案 0 :(得分:0)
我终于想通了,所以我正在回答我自己的问题,以防其他人出现并想知道类似的东西。
因为我知道Leaflet已经定义了一个全局变量 L ,所以在加载RequireJS中的源文件之前,我将一个空表变量定义为L.
L = {}
然后,当您将模块加载到Require中时,我将传单和 esri-leaflet 添加为L并将L分配给L.
<强>代码强>:
// Leaflet + ESRI-Leaflet fix.
L = {}
// here we put the paths to all the libraries and framework we will use
require.config({
paths: {
jquery: '../lib/zepto/zepto',
underscore: '../lib/underscore/underscore',
backbone: "../lib/backbone/backbone",
text: '../lib/require/text',
async: '../lib/require/async',
handlebars: '../lib/handlebars/handlebars',
templates: '../templates',
preloader: '../lib/preloader/pre-loader',
utils: '../lib/utils/utils',
leaflet: '../lib/leaflet/leaflet-src',
'esri-leaflet': '../lib/leaflet/esri-leaflet',
'esri-fullscreen': '../lib/leaflet/Leaflet.fullscreen.min',
'esri-renderers': '../lib/leaflet/esri-leaflet-renderers',
},
shim: {
'jquery': {
exports: '$'
}
, 'underscore': {
exports: '_'
}
, 'handlebars': {
exports: 'Handlebars'
}
, 'leaflet': {
exports: 'L'
}
}
});
// Launch the App
require(['backbone', 'utils'], function (Backbone, Utils) {
// Include Leaflet and Leaflet-esri on launch as L and assign it to the global variable.
require(['preloader', 'router', 'leaflet', 'esri-leaflet'], function (PreLoader, AppRouter, L) {
L = L; // Globalize on load
document.addEventListener("deviceready", run, false);
function run() {
// Precompile all templates for faster view switching
Utils.loadTemplates().once("templatesLoaded", function () {
var images = [
// Add images for preloading here. One image per line in an absolute path, e.g.:
// '/android_asset/www/img/myimage.png',
];
if (images.length) {
new PreLoader(images, {
onComplete: startRouter
});
}
else {
// start the router directly if there are no images to be preloaded
startRouter();
}
function startRouter() {
// launch the router
var router = new AppRouter();
Backbone.history.start();
}
});
}
});
});