如何导入单张路由机到Ionic2项目？(How to import leaflet-routing-

我不完全得到如何导入LRM成TS文件。通过安装完成后npm install leaflet-routing-machine ，我定义的路由是这样的：

var Routing = require('leaflet-routing-machine');
var newRoute = Routing.control({Options});

这并没有帮助我，我得到：

Error caused by: Routing.control is not a function

这里是我的离子信息：

Cordova CLI: 6.4.0
Ionic Framework Version: 2.0.1
Ionic CLI Version: 2.2.1
Ionic App Lib Version: 2.2.0
Ionic App Scripts Version: 1.1.0
Node Version: v6.3.1

顺便说一句，我没有与小叶本身的任何问题。

Answer 1:

我们通过声明我们的组件之前，将下面的行解决了这个问题。

declare var L: any;

myclass.component.ts

import { Component, OnInit } from '@angular/core';
...

// Leaflet and Leaflet Routing Machine have been installed with npm
import 'leaflet-routing-machine';
import 'leaflet-easybutton';

// Add this line to remove typescript errors
declare var L: any;

@Component({
  ...
})
export class MyClass extends OnInit {
  ...

  constructor(...) {
    ...
  }

  ngOnInit() {

    ...

    // The example snippet is now working
    L.Routing.control({
      waypoints: [
        L.latLng(57.74, 11.94),
        L.latLng(57.6792, 11.949)
      ]
    }).addTo(myMap);

    ...

  }

  ...

}

正如提到的这个帖子，打字稿似乎导致问题将属性添加到单张的全球大号对象，但在我们的例子声明类型L的任何足以使其工作。

Answer 2:

不知道如果单张铣机插件直接出口本身。

通常，它至少应该有连接到的副作用L全局命名空间。

打完电话后require('leaflet-routing-machine')你尝试实例化与控制L.routing.control ？（注意起始L ）

Answer 3:

好。如何使用它！

1） npm i leaflet-routing-machine https://www.npmjs.com/package/leaflet-routing-machine

2） npm i leaflet-easybutton https://www.npmjs.com/package/leaflet-easybutton

3）在工作页面导入模块：

import leaflet from 'leaflet'; 
import 'leaflet-routing-machine'; 
import 'leaflet-easybutton';

4）声明大号declare var L:any;

添加代码内容

var maptt = leaflet.map('mapId2');
leaflet.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', { 
    attribution: '©suwitbb' 
}).addTo(maptt);

leaflet.Routing.control({ 
    waypoints: [ 
        leaflet.latLng(57.74, 11.94), 
        leaflet.latLng(57.6792, 11.949) 
    ], routeWhileDragging: true 
}).addTo(maptt);

6）添加标签，以查看HTML

Answer 4:

在离子4，试试吧。

1）NPM我小叶。
2）NPM我小叶路由机。
3）进口的 “的index.html” 的JS和CSS。

<!-- Leaflet CDN JS and Css-->
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.4.0/dist/leaflet.css" integrity="sha512-puBpdR0798OZvTTbP4A8Ix/l+A4dHDD0DGqYW6RQ+9jxkRFclaxxQb/SJAWZfWAkuyeQUytO7+7N4QKrDh+drA==" crossorigin="" />
<script src="https://unpkg.com/leaflet@1.4.0/dist/leaflet.js" integrity="sha512-QVftwZFqvtRNi0ZyCtsznlKSWOStnDORoefr1enyq5mVL4tmKB3S/EnC3rRJcxCPavG10IcrVGSmPh6Qw5lwrg==" crossorigin=""></script>

<!-- Leaflet Machine. path: 'node_modules/leaflet-routing-machine/dist/leaflet-routing-machine.js' the same to css-->
<link rel="stylesheet" href="./assets/css/leaflet-routing-machine.css">
<script src="./assets/js/leaflet-routing-machine.js"></script>

4）在your_component.ts

import Leaflet from 'leaflet';
import 'leaflet-routing-machine';

// Add this line to remove typescript errors
declare var L: any;

export class FullScreenMapPage implements OnInit { 
  // mapa
  mapa: any;

  ionViewDidEnter() {
    this.drawMap();
  }

drawMap(): void {
    // marcador del mapa
    const markerGroup = Leaflet.featureGroup();
    const marker = Leaflet.marker([lat, lng]);

    this.mapa = Leaflet.map('map').setView([lat, lng], 11);

    Leaflet.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
    attribution: '© Open Street Map',
    zoom: 8,
    maxZoom: 18,
    minZoom: 4,
    minResolution: 4891.96981025128,
    maxResolution: 39135.75848201024,
    doubleClickZoom: true,
    center: [lat, lng]
    }).addTo(this.mapa);

    Leaflet.Routing.control({
      waypoints: [
        Leaflet.latLng(PointA_lat, PointB_lng),
        Leaflet.latLng(PointB_lat, PointB_lng)
      ], routeWhileDragging: true
    }).addTo(this.mapa);

  }

}