将 googlemaps 添加到 angular-cli [英] adding googlemaps to angular-cli
问题描述
我正在尝试将 googlemaps 实施到我的 angular-cli 项目中.我知道有一个angular2-google-maps"组件(github),但我需要路由和更多自定义功能.
I am trying to implement googlemaps to my angular-cli project. I know that there is a 'angular2-google-maps' component (github), but I need routes and more custom features.
我找到了两种将地图实施到项目中的方法:
I found two ways on implementing the map into an project:
1:stackoverflow:使用谷歌api 加载器 - 但我不知道如何初始化谷歌地图...
1: stackoverflow: with a google api loader - but I couldn't figure out how to initialise google-maps...
2:使用绝对类型 google.maps.d.ts.我将它与 --global (因为环境不推荐使用..)一起安装到我的项目中,并将 index.d.ts(用于全局)添加到 src/typings.d.ts 并且可以使用google.map..".ts 文件:
2: with an DefinitelyTyped google.maps.d.ts. I installed it with --global (since ambient ist deprecated..) into my project and added the index.d.ts (for global) to the src/typings.d.ts and can use "google.map.." in an .ts file:
myLatLng = {lat: -25.363, lng: 131.044};
map:any;
constructor() {
this.map = new google.maps.Map(document.getElementById('map'), {
center: this.myLatLng,
zoom: 4
});
}
但是如果我用 angular-cli 构建它会出错:参考错误:未定义谷歌"
but if I build it with angular-cli it errors: "ReferenceError: google is not defined"
有什么想法吗?
推荐答案
这里是将谷歌地图组件添加到 angular-cli 项目的分步指南.
Here a step by step guide to add a google maps component to angular-cli project.
步骤 1:从绝对类型安装 google.maps:
Step1 : install google.maps from DefinitelyTyped:
typings i dt~google.maps --global --save
第 2 步:如果您安装了较旧的类型,请添加
Step2 : if you have an older typings installed add
/// <reference path="../typings/index.d.ts" />
到你的 src/typings.d.ts
to your src/typings.d.ts
Step3:生成新组件
Step3 : generate new component
ng g component google-maps
将以下代码添加到:
.ts :
height = '100px';
myLatLng = {lat: -25.363, lng: 131.044};
map:any;
constructor(private googleApi:GoogleApiService) {}
ngOnInit() {
this.googleApi.initMap().then(() => {
let latlng = new google.maps.LatLng(this.myLatLng.lat, this.myLatLng.lng);
this.map = new google.maps.Map(document.getElementById('map'), {
center: latlng,
zoom: 4
});
new google.maps.Marker({
position: latlng,
map: this.map,
title: 'Hello World!'
});
});
}
.html:
<div id="map" [style.height]="height"></div>
Step4 : 生成新服务
Step4 : generate new service
ng g service google-maps/shared/google-api
将 GoogleApiService + HTTP_PROVIDERS 添加到 src/main.ts
Add GoogleApiService + HTTP_PROVIDERS to src/main.ts
代码:
const API_KEY = '[insert your code]';
const url = 'https://maps.googleapis.com/maps/api/js?key='+ API_KEY +'&callback=initMap';
@Injectable()
export class GoogleApiService {
private loadMap: Promise<any>;
constructor(private http:Http) {
this.loadMap = new Promise((resolve) => {
window['initMap'] = () => {
resolve();
};
this.loadScript()
});
}
public initMap():Promise<any> {
return this.loadMap;
}
private loadScript() {
let script = document.createElement('script');
script.src = url;
script.type = 'text/javascript';
if (document.body.contains(script)) {
return;
}
document.getElementsByTagName('head')[0].appendChild(script);
}
}
也许你需要从 spec.ts 文件中删除一些行.但随后您可以将 GoogleMapsComponent 添加为指令.
Maybe you need to delete some lines from the spec.ts files. But then you can add the GoogleMapsComponent as a directive.
- 使用路由等进行扩展非常容易.也许如果我有时间,我会将当前版本的 GoogleMapsComponent 上传到 github..
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