我已经构建了一个地理位置服务,希望在home.page上使用getUserPosition()方法
location.service.ts
import { Injectable } from '@angular/core';
import { Geolocation, GeolocationOptions, Geoposition, PositionError } from '@ionic-native/geolocation/ngx';
@Injectable({
providedIn: 'root'
})
export class LocationService {
options: GeolocationOptions;
currentPos: Geoposition;
loc: any;
constructor( private geolocation: Geolocation ) { }
getUserPosition() {
return new Promise((resolve, reject) => {
this.options = {
maximumAge: 3000,
enableHighAccuracy: true
};
this.geolocation.getCurrentPosition(this.options).then((pos: Geoposition) => {
this.currentPos = pos;
const location = {
lat: pos.coords.latitude,
lng: pos.coords.longitude,
time: new Date(),
};
console.log('loc', location);
resolve(pos);
}, (err: PositionError) => {
console.log("error : " + err.message);
reject(err.message);
});
});
}
}
我在home.page中访问该服务
home.ts
import { Component, OnInit } from '@angular/core';
import { LocationService } from '../../services/geolocation/location.service';
@Component({
selector: 'app-home',
templateUrl: './home.page.html',
styleUrls: ['./home.page.scss'],
})
export class WorkalonePage implements OnInit {
getPosition: any;
constructor(
private LocationService: LocationService
) {}
ngOnInit() {
this.getPosition = this.LocationService.getUserPosition;
}
}
home.html
<ion-content>
<ion-button expand="full" color="primary" (click)="getUserPosition()">Get Location Sevice</ion-button>
</ion-content>
但是当我在HTML上单击(click)=“ getUserPosition()”时,出现错误getUserPosition()不是函数。我一直在网上寻找答案,但是所有答案都涉及使用home.ts文件中的地理位置。任何帮助将不胜感激。
根据我在home.ts
中看到的内容,您尚未定义名为getUserPosition
的函数。
将以下内容添加到home.ts
:
getUserPosition() {
this.LocationService.getUserPosition().then((pos) => {
this.getPosition = pos;
});
}
您可以像这样直接在html中调用您的服务方法
在home.ts中定义服务对象
constructor(public ls:LocationService){}
At home.html
<ion-button expand="full" color="primary" (click)="ls.getUserPosition()">
Get Location Sevice
</ion-button>