将传单 Draw 导入 Angular 2 项目

Question

我是 Angular2 的新手。用 Cli 构建。尽管我能够在没有任何 Angular2 指令的情况下将 Leaflet 导入到这个 Angular2 项目中。我想对 Leaflet Draw 扩展做同样的事情。我无法让 Draw 工作。基本上，我想导入一个在同一个命名空间上扩展另一个模块的模块。在这种情况下传单。没有人知道该怎么做吗？

这是我的 package.json

{
"name": "amscm-web",
  "version": "2.0.31c",
  "license": "",
  "angular-cli": {},
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "lint": "tslint \"src/**/*.ts\" --project src/tsconfig.json --type-check && tslint \"e2e/**/*.ts\" --project e2e/tsconfig.json --type-check",
    "test": "ng test",
    "pree2e": "webdriver-manager update --standalone false --gecko false",
    "e2e": "protractor"
  },
  "private": true,
  "dependencies": {
    "@angular/common": "^4.2.3",
    "@angular/compiler": "^4.2.3",
    "@angular/core": "^4.2.3",
    "@angular/forms": "^4.2.3",
    "@angular/http": "^4.2.3",
    "@angular/platform-browser": "^4.2.3",
    "@angular/platform-browser-dynamic": "^4.2.3",
    "@angular/router": "^4.2.3",
    "@asymmetrik/angular2-leaflet": "^2.1.5",
    "@ng-bootstrap/ng-bootstrap": "^1.0.0-alpha.26",
    "@qontu/ngx-inline-editor": "^0.2.0-alpha.4",
    "@types/leaflet-draw": "^0.4.5",
    "angular-oauth2-oidc": "^1.0.20",
    "angular-sortablejs": "^2.0.6",
    "angular2-uuid": "^1.1.1",
    "core-js": "^2.4.1",
    "karma-chrome-launcher": "^2.1.1",
    "karma-jasmine-html-reporter": "^0.2.2",
    "leaflet": "^1.0.3",
    "leaflet-draw": "^0.4.9",
    "ng-select": "^1.0.0-beta.5",
    "ng2-dnd": "^4.2.0",
    "rxjs": "^5.4.1",
    "sortablejs": "^1.6.0",
    "ts-helpers": "^1.1.1",
    "webpack": "^3.0.0",
    "webpack-dev-server": "^2.4.5",
    "zone.js": "^0.8.12"
  },
  "devDependencies": {
    "@angular/cli": "^1.1.2",
    "@angular/compiler-cli": "^4.2.3",
    "@types/gapi": "0.0.33",
    "@types/gapi.auth2": "0.0.39",
    "@types/jasmine": "2.5.53",
    "@types/leaflet": "^1.0.63",
    "@types/node": "^8.0.3",
    "codelyzer": "~3.1.1",
    "jasmine-core": "2.6.4",
    "jasmine-spec-reporter": "4.1.1",
    "karma": "1.7.0",
    "karma-chrome-launcher": "^2.2.0",
    "karma-cli": "^1.0.1",
    "karma-coverage-istanbul-reporter": "^1.3.0",
    "karma-jasmine": "^1.0.2",
    "karma-remap-istanbul": "^0.6.0",
    "protractor": "~5.1.2",
    "ts-node": "3.1.0",
    "tslint": "^5.4.3",
    "typescript": "latest",
    "webpack": "^3.0.0",
    "webpack-dev-server": "^2.5.0"
  }
}

这也是我的 map.model.ts

import * as L from 'leaflet';
import 'leaflet.draw'

export class LeafletMapModel {

  constructor(
    public baseLayers: {
      id: string,
      name: string,
      enabled: boolean,
      layer: L.Layer
    }[],
    public baseLayer: string,
    public overlayLayers: {
      id: string,
      name: string,
      enabled: boolean,
      layer: L.Layer
    }[] = []
  ) { }

}

Answer 1

这对我有用：

import { Component } from '@angular/core';
import { Leaflet } from 'leaflet';
import { Draw } from 'leaflet-draw';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  title = 'app';
  _layer = Leaflet.layer;
  _draw = Draw.drawLocal;
}

Answer 2

以下方法对我很有效：

npm install leaflet@latest --save

在 Angular 组件中：

       import * as L from 'leaflet';
...
        @ViewChild('map') mapElement;
          ngOnInit() {
    const myMap = this.mapElement.nativeElement;
    const map = L.map(myMap).setView([51.505, -0.09], 13);

    L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
        attribution: '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
    }).addTo(map);

    L.marker([51.5, -0.09]).addTo(map)
        .bindPopup('A pretty CSS3 popup.<br> Easily customizable.')
        .openPopup();

}